diff --git a/htdocs/js/PGCodeMirror/PG.js b/htdocs/js/PGCodeMirror/PG.js
deleted file mode 100644
index e003158379..0000000000
--- a/htdocs/js/PGCodeMirror/PG.js
+++ /dev/null
@@ -1,1567 +0,0 @@
-// Bassed off of CodeMirror mode perl file:
-// https://github.com/codemirror/CodeMirror/blob/master/mode/perl/perl.js
-
-'use strict';
-
-(() => {
-	CodeMirror.defineMode('PG', function () {
-		// http://perldoc.perl.org
-		const PERL = {
-			//   null - magic touch
-			//   1 - keyword
-			//   2 - def
-			//   3 - atom
-			//   4 - operator
-			//   5 - variable-2 (predefined)
-			//   [x,y] - x=1,2,3; y=must be defined if x{...}
-			//	PERL operators
-			'->': 4,
-			'++': 4,
-			'--': 4,
-			'**': 4,
-			//   ! ~ \ and unary + and -
-			'=~': 4,
-			'!~': 4,
-			'*': 4,
-			'/': 4,
-			'%': 4,
-			x: 4,
-			'+': 4,
-			'-': 4,
-			'.': 4,
-			'<<': 4,
-			'>>': 4,
-			//   named unary operators
-			'<': 4,
-			'>': 4,
-			'<=': 4,
-			'>=': 4,
-			lt: 4,
-			gt: 4,
-			le: 4,
-			ge: 4,
-			'==': 4,
-			'!=': 4,
-			'<=>': 4,
-			eq: 4,
-			ne: 4,
-			cmp: 4,
-			'~~': 4,
-			'&': 4,
-			'|': 4,
-			'^': 4,
-			'&&': 4,
-			'||': 4,
-			'//': 4,
-			'..': 4,
-			'...': 4,
-			'?': 4,
-			':': 4,
-			'=': 4,
-			'+=': 4,
-			'-=': 4,
-			'*=': 4, //   etc. ???
-			',': 4,
-			'=>': 4,
-			'::': 4,
-			//   list operators (rightward)
-			not: 4,
-			and: 4,
-			or: 4,
-			xor: 4,
-			//	PERL predefined variables (I know, what this is a paranoid idea, but may be needed for people, who learn PERL, and for me as well, ...and may be for you?;)
-			BEGIN: [5, 1],
-			END: [5, 1],
-			PRINT: [5, 1],
-			PRINTF: [5, 1],
-			GETC: [5, 1],
-			READ: [5, 1],
-			READLINE: [5, 1],
-			DESTROY: [5, 1],
-			TIE: [5, 1],
-			TIEHANDLE: [5, 1],
-			UNTIE: [5, 1],
-			STDIN: 5,
-			STDIN_TOP: 5,
-			STDOUT: 5,
-			STDOUT_TOP: 5,
-			STDERR: 5,
-			STDERR_TOP: 5,
-			$ARG: 5,
-			$_: 5,
-			'@ARG': 5,
-			'@_': 5,
-			$LIST_SEPARATOR: 5,
-			'$"': 5,
-			$PROCESS_ID: 5,
-			$PID: 5,
-			$$: 5,
-			$REAL_GROUP_ID: 5,
-			$GID: 5,
-			'$(': 5,
-			$EFFECTIVE_GROUP_ID: 5,
-			$EGID: 5,
-			'$)': 5,
-			$PROGRAM_NAME: 5,
-			$0: 5,
-			$SUBSCRIPT_SEPARATOR: 5,
-			$SUBSEP: 5,
-			'$;': 5,
-			$REAL_USER_ID: 5,
-			$UID: 5,
-			'$<': 5,
-			$EFFECTIVE_USER_ID: 5,
-			$EUID: 5,
-			'$>': 5,
-			//			'$a'				:    5,
-			//			'$b'				:    5,
-			$COMPILING: 5,
-			'$^C': 5,
-			$DEBUGGING: 5,
-			'$^D': 5,
-			'${^ENCODING}': 5,
-			$ENV: 5,
-			'%ENV': 5,
-			$SYSTEM_FD_MAX: 5,
-			'$^F': 5,
-			'@F': 5,
-			'${^GLOBAL_PHASE}': 5,
-			'$^H': 5,
-			'%^H': 5,
-			'@INC': 5,
-			'%INC': 5,
-			$INPLACE_EDIT: 5,
-			'$^I': 5,
-			'$^M': 5,
-			$OSNAME: 5,
-			'$^O': 5,
-			'${^OPEN}': 5,
-			$PERLDB: 5,
-			'$^P': 5,
-			$SIG: 5,
-			'%SIG': 5,
-			$BASETIME: 5,
-			'$^T': 5,
-			'${^TAINT}': 5,
-			'${^UNICODE}': 5,
-			'${^UTF8CACHE}': 5,
-			'${^UTF8LOCALE}': 5,
-			$PERL_VERSION: 5,
-			'$^V': 5,
-			'${^WIN32_SLOPPY_STAT}': 5,
-			$EXECUTABLE_NAME: 5,
-			'$^X': 5,
-			$1: 5, // - regexp $1, $2...
-			$MATCH: 5,
-			'$&': 5,
-			'${^MATCH}': 5,
-			$PREMATCH: 5,
-			'$`': 5,
-			'${^PREMATCH}': 5,
-			$POSTMATCH: 5,
-			"$'": 5,
-			'${^POSTMATCH}': 5,
-			$LAST_PAREN_MATCH: 5,
-			'$+': 5,
-			$LAST_SUBMATCH_RESULT: 5,
-			'$^N': 5,
-			'@LAST_MATCH_END': 5,
-			'@+': 5,
-			'%LAST_PAREN_MATCH': 5,
-			'%+': 5,
-			'@LAST_MATCH_START': 5,
-			'@-': 5,
-			'%LAST_MATCH_START': 5,
-			'%-': 5,
-			$LAST_REGEXP_CODE_RESULT: 5,
-			'$^R': 5,
-			'${^RE_DEBUG_FLAGS}': 5,
-			'${^RE_TRIE_MAXBUF}': 5,
-			$ARGV: 5,
-			'@ARGV': 5,
-			ARGV: 5,
-			ARGVOUT: 5,
-			$OUTPUT_FIELD_SEPARATOR: 5,
-			$OFS: 5,
-			'$,': 5,
-			$INPUT_LINE_NUMBER: 5,
-			$NR: 5,
-			'$.': 5,
-			$INPUT_RECORD_SEPARATOR: 5,
-			$RS: 5,
-			'$/': 5,
-			$OUTPUT_RECORD_SEPARATOR: 5,
-			$ORS: 5,
-			'$\\': 5,
-			$OUTPUT_AUTOFLUSH: 5,
-			'$|': 5,
-			$ACCUMULATOR: 5,
-			'$^A': 5,
-			$FORMAT_FORMFEED: 5,
-			'$^L': 5,
-			$FORMAT_PAGE_NUMBER: 5,
-			'$%': 5,
-			$FORMAT_LINES_LEFT: 5,
-			'$-': 5,
-			$FORMAT_LINE_BREAK_CHARACTERS: 5,
-			'$:': 5,
-			$FORMAT_LINES_PER_PAGE: 5,
-			'$=': 5,
-			$FORMAT_TOP_NAME: 5,
-			'$^': 5,
-			$FORMAT_NAME: 5,
-			'$~': 5,
-			'${^CHILD_ERROR_NATIVE}': 5,
-			$EXTENDED_OS_ERROR: 5,
-			'$^E': 5,
-			$EXCEPTIONS_BEING_CAUGHT: 5,
-			'$^S': 5,
-			$WARNING: 5,
-			'$^W': 5,
-			'${^WARNING_BITS}': 5,
-			$OS_ERROR: 5,
-			$ERRNO: 5,
-			'$!': 5,
-			'%OS_ERROR': 5,
-			'%ERRNO': 5,
-			'%!': 5,
-			$CHILD_ERROR: 5,
-			'$?': 5,
-			$EVAL_ERROR: 5,
-			'$@': 5,
-			$OFMT: 5,
-			'$#': 5,
-			'$*': 5,
-			$ARRAY_BASE: 5,
-			'$[': 5,
-			$OLD_PERL_VERSION: 5,
-			'$]': 5,
-			//	PERL blocks
-			if: [1, 1],
-			elsif: [1, 1],
-			else: [1, 1],
-			while: [1, 1],
-			unless: [1, 1],
-			until: [1, 1],
-			for: [1, 1],
-			foreach: [1, 1],
-			//	PERL functions
-			abs: 1, // - absolute value function
-			accept: 1, // - accept an incoming socket connect
-			alarm: 1, // - schedule a SIGALRM
-			atan2: 1, // - arctangent of Y/X in the range -PI to PI
-			bind: 1, // - binds an address to a socket
-			binmode: 1, // - prepare binary files for I/O
-			bless: 1, // - create an object
-			bootstrap: 1, //
-			break: 1, // - break out of a "given" block
-			caller: 1, // - get context of the current subroutine call
-			chdir: 1, // - change your current working directory
-			chmod: 1, // - changes the permissions on a list of files
-			chomp: 1, // - remove a trailing record separator from a string
-			chop: 1, // - remove the last character from a string
-			chown: 1, // - change the ownership on a list of files
-			chr: 1, // - get character this number represents
-			chroot: 1, // - make directory new root for path lookups
-			close: 1, // - close file (or pipe or socket) handle
-			closedir: 1, // - close directory handle
-			connect: 1, // - connect to a remote socket
-			continue: [1, 1], // - optional trailing block in a while or foreach
-			cos: 1, // - cosine function
-			crypt: 1, // - one-way passwd-style encryption
-			dbmclose: 1, // - breaks binding on a tied dbm file
-			dbmopen: 1, // - create binding on a tied dbm file
-			default: 1, //
-			defined: 1, // - test whether a value, variable, or function is defined
-			delete: 1, // - deletes a value from a hash
-			die: 1, // - raise an exception or bail out
-			do: 1, // - turn a BLOCK into a TERM
-			dump: 1, // - create an immediate core dump
-			each: 1, // - retrieve the next key/value pair from a hash
-			endgrent: 1, // - be done using group file
-			endhostent: 1, // - be done using hosts file
-			endnetent: 1, // - be done using networks file
-			endprotoent: 1, // - be done using protocols file
-			endpwent: 1, // - be done using passwd file
-			endservent: 1, // - be done using services file
-			eof: 1, // - test a filehandle for its end
-			eval: 1, // - catch exceptions or compile and run code
-			exec: 1, // - abandon this program to run another
-			exists: 1, // - test whether a hash key is present
-			exit: 1, // - terminate this program
-			exp: 1, // - raise I to a power
-			fcntl: 1, // - file control system call
-			fileno: 1, // - return file descriptor from filehandle
-			flock: 1, // - lock an entire file with an advisory lock
-			fork: 1, // - create a new process just like this one
-			format: 1, // - declare a picture format with use by the write() function
-			formline: 1, // - internal function used for formats
-			getc: 1, // - get the next character from the filehandle
-			getgrent: 1, // - get next group record
-			getgrgid: 1, // - get group record given group user ID
-			getgrnam: 1, // - get group record given group name
-			gethostbyaddr: 1, // - get host record given its address
-			gethostbyname: 1, // - get host record given name
-			gethostent: 1, // - get next hosts record
-			getlogin: 1, // - return who logged in at this tty
-			getnetbyaddr: 1, // - get network record given its address
-			getnetbyname: 1, // - get networks record given name
-			getnetent: 1, // - get next networks record
-			getpeername: 1, // - find the other end of a socket connection
-			getpgrp: 1, // - get process group
-			getppid: 1, // - get parent process ID
-			getpriority: 1, // - get current nice value
-			getprotobyname: 1, // - get protocol record given name
-			getprotobynumber: 1, // - get protocol record numeric protocol
-			getprotoent: 1, // - get next protocols record
-			getpwent: 1, // - get next passwd record
-			getpwnam: 1, // - get passwd record given user login name
-			getpwuid: 1, // - get passwd record given user ID
-			getservbyname: 1, // - get services record given its name
-			getservbyport: 1, // - get services record given numeric port
-			getservent: 1, // - get next services record
-			getsockname: 1, // - retrieve the sockaddr for a given socket
-			getsockopt: 1, // - get socket options on a given socket
-			given: 1, //
-			glob: 1, // - expand filenames using wildcards
-			gmtime: 1, // - convert UNIX time into record or string using Greenwich time
-			goto: 1, // - create spaghetti code
-			grep: 1, // - locate elements in a list test true against a given criterion
-			hex: 1, // - convert a string to a hexadecimal number
-			import: 1, // - patch a module's namespace into your own
-			index: 1, // - find a substring within a string
-			int: 1, // - get the integer portion of a number
-			ioctl: 1, // - system-dependent device control system call
-			join: 1, // - join a list into a string using a separator
-			keys: 1, // - retrieve list of indices from a hash
-			kill: 1, // - send a signal to a process or process group
-			last: 1, // - exit a block prematurely
-			lc: 1, // - return lower-case version of a string
-			lcfirst: 1, // - return a string with just the next letter in lower case
-			length: 1, // - return the number of bytes in a string
-			link: 1, // - create a hard link in the filesystem
-			listen: 1, // - register your socket as a server
-			local: 2, // - create a temporary value for a global variable (dynamic scoping)
-			localtime: 1, // - convert UNIX time into record or string using local time
-			lock: 1, // - get a thread lock on a variable, subroutine, or method
-			log: 1, // - retrieve the natural logarithm for a number
-			lstat: 1, // - stat a symbolic link
-			m: null, // - match a string with a regular expression pattern
-			map: 1, // - apply a change to a list to get back a new list with the changes
-			mkdir: 1, // - create a directory
-			msgctl: 1, // - SysV IPC message control operations
-			msgget: 1, // - get SysV IPC message queue
-			msgrcv: 1, // - receive a SysV IPC message from a message queue
-			msgsnd: 1, // - send a SysV IPC message to a message queue
-			my: 2, // - declare and assign a local variable (lexical scoping)
-			new: 1, //
-			next: 1, // - iterate a block prematurely
-			no: 1, // - unimport some module symbols or semantics at compile time
-			oct: 1, // - convert a string to an octal number
-			open: 1, // - open a file, pipe, or descriptor
-			opendir: 1, // - open a directory
-			ord: 1, // - find a character's numeric representation
-			our: 2, // - declare and assign a package variable (lexical scoping)
-			pack: 1, // - convert a list into a binary representation
-			package: 1, // - declare a separate global namespace
-			pipe: 1, // - open a pair of connected filehandles
-			pop: 1, // - remove the last element from an array and return it
-			pos: 1, // - find or set the offset for the last/next m//g search
-			print: 1, // - output a list to a filehandle
-			printf: 1, // - output a formatted list to a filehandle
-			prototype: 1, // - get the prototype (if any) of a subroutine
-			push: 1, // - append one or more elements to an array
-			q: null, // - singly quote a string
-			qq: null, // - doubly quote a string
-			qr: null, // - Compile pattern
-			quotemeta: null, // - quote regular expression magic characters
-			qw: null, // - quote a list of words
-			qx: null, // - backquote quote a string
-			rand: 1, // - retrieve the next pseudorandom number
-			read: 1, // - fixed-length buffered input from a filehandle
-			readdir: 1, // - get a directory from a directory handle
-			readline: 1, // - fetch a record from a file
-			readlink: 1, // - determine where a symbolic link is pointing
-			readpipe: 1, // - execute a system command and collect standard output
-			recv: 1, // - receive a message over a Socket
-			redo: 1, // - start this loop iteration over again
-			ref: 1, // - find out the type of thing being referenced
-			rename: 1, // - change a filename
-			require: 1, // - load in external functions from a library at runtime
-			reset: 1, // - clear all variables of a given name
-			return: 1, // - get out of a function early
-			reverse: 1, // - flip a string or a list
-			rewinddir: 1, // - reset directory handle
-			rindex: 1, // - right-to-left substring search
-			rmdir: 1, // - remove a directory
-			s: null, // - replace a pattern with a string
-			say: 1, // - print with newline
-			scalar: 1, // - force a scalar context
-			seek: 1, // - reposition file pointer for random-access I/O
-			seekdir: 1, // - reposition directory pointer
-			select: 1, // - reset default output or do I/O multiplexing
-			semctl: 1, // - SysV semaphore control operations
-			semget: 1, // - get set of SysV semaphores
-			semop: 1, // - SysV semaphore operations
-			send: 1, // - send a message over a socket
-			setgrent: 1, // - prepare group file for use
-			sethostent: 1, // - prepare hosts file for use
-			setnetent: 1, // - prepare networks file for use
-			setpgrp: 1, // - set the process group of a process
-			setpriority: 1, // - set a process's nice value
-			setprotoent: 1, // - prepare protocols file for use
-			setpwent: 1, // - prepare passwd file for use
-			setservent: 1, // - prepare services file for use
-			setsockopt: 1, // - set some socket options
-			shift: 1, // - remove the first element of an array, and return it
-			shmctl: 1, // - SysV shared memory operations
-			shmget: 1, // - get SysV shared memory segment identifier
-			shmread: 1, // - read SysV shared memory
-			shmwrite: 1, // - write SysV shared memory
-			shutdown: 1, // - close down just half of a socket connection
-			sin: 1, // - return the sine of a number
-			sleep: 1, // - block for some number of seconds
-			socket: 1, // - create a socket
-			socketpair: 1, // - create a pair of sockets
-			sort: 1, // - sort a list of values
-			splice: 1, // - add or remove elements anywhere in an array
-			split: 1, // - split up a string using a regexp delimiter
-			sprintf: 1, // - formatted print into a string
-			sqrt: 1, // - square root function
-			srand: 1, // - seed the random number generator
-			stat: 1, // - get a file's status information
-			state: 1, // - declare and assign a state variable (persistent lexical scoping)
-			study: 1, // - optimize input data for repeated searches
-			sub: 1, // - declare a subroutine, possibly anonymously
-			substr: 1, // - get or alter a portion of a string
-			symlink: 1, // - create a symbolic link to a file
-			syscall: 1, // - execute an arbitrary system call
-			sysopen: 1, // - open a file, pipe, or descriptor
-			sysread: 1, // - fixed-length unbuffered input from a filehandle
-			sysseek: 1, // - position I/O pointer on handle used with sysread and syswrite
-			system: 1, // - run a separate program
-			syswrite: 1, // - fixed-length unbuffered output to a filehandle
-			tell: 1, // - get current seekpointer on a filehandle
-			telldir: 1, // - get current seekpointer on a directory handle
-			tie: 1, // - bind a variable to an object class
-			tied: 1, // - get a reference to the object underlying a tied variable
-			time: 1, // - return number of seconds since 1970
-			times: 1, // - return elapsed time for self and child processes
-			tr: null, // - transliterate a string
-			truncate: 1, // - shorten a file
-			uc: 1, // - return upper-case version of a string
-			ucfirst: 1, // - return a string with just the next letter in upper case
-			umask: 1, // - set file creation mode mask
-			undef: 1, // - remove a variable or function definition
-			unlink: 1, // - remove one link to a file
-			unpack: 1, // - convert binary structure into normal perl variables
-			unshift: 1, // - prepend more elements to the beginning of a list
-			untie: 1, // - break a tie binding to a variable
-			use: 1, // - load in a module at compile time
-			utime: 1, // - set a file's last access and modify times
-			values: 1, // - return a list of the values in a hash
-			vec: 1, // - test or set particular bits in a string
-			wait: 1, // - wait for any child process to die
-			waitpid: 1, // - wait for a particular child process to die
-			wantarray: 1, // - get void vs scalar vs list context of current subroutine call
-			warn: 1, // - print debugging info
-			when: 1, //
-			write: 1, // - print a picture record
-			y: null // - transliterate a string
-		};
-		//	PG Keywords and Variables
-		const PGstyle = 'atom';
-		const PGkeyword = 'keyword';
-		const PGcmds = new Set([
-			'DOCUMENT',
-			'ENDDOCUMENT',
-			'loadMacros',
-			'TEXT',
-			'SOLUTION',
-			'HINT',
-			'STATEMENT',
-			'COMMENT',
-			'MODES',
-			'htmlLink',
-			'helpLink',
-			'knowlLink',
-			'image',
-			'Context',
-			'Compute',
-			'Real',
-			'Formula',
-			'String',
-			'List',
-			'Complex',
-			'Point',
-			'Vector',
-			'Matrix',
-			'Interval',
-			'Set',
-			'Fraction',
-			'ANS',
-			'NAMED_ANS',
-			'WEIGHTED_ANS',
-			'MultiAnswer',
-			'Value',
-			'random',
-			'list_random',
-			'non_zero_random',
-			'NchooseK'
-		]);
-		const PGvars = new Set([
-			'BR',
-			'RBR',
-			'PAR',
-			'LQ',
-			'RQ',
-			'BM',
-			'EM',
-			'BDM',
-			'EDM',
-			'LTS',
-			'GTS',
-			'LTE',
-			'GTE',
-			'BEGIN_ONE_COLUMN',
-			'END_ONE_COLUMN',
-			'SOL',
-			'SOLUTION',
-			'HINT',
-			'COMMENT',
-			'US',
-			'SPACE',
-			'NBSP',
-			'NDASH',
-			'MDASH',
-			'BLABEL',
-			'ELABEL',
-			'BBOLD',
-			'EBOLD',
-			'BITALIC',
-			'EITALIC',
-			'BUL',
-			'EUL',
-			'BCENTER',
-			'ECENTER',
-			'BLTR',
-			'ELTR',
-			'BKBD',
-			'EKBD',
-			'HR',
-			'LBRACE',
-			'RBRACE',
-			'LB',
-			'RB',
-			'DOLLAR',
-			'PERCENT',
-			'CARET',
-			'PI',
-			'E',
-			'LATEX',
-			'TEX',
-			'APOS',
-			'showPartialCorrectAnswers',
-			'refreshCachedImages',
-			'ITEM',
-			'ITEMSEP'
-		]);
-
-		const RXstyle = 'string-2';
-		const RXmodifiers = /[goseximacplud]/; // NOTE: "m", "s", "y" and "tr" need to correct real modifiers for each regexp type
-
-		function tokenChain(stream, state, chain, style, tail, tokener) {
-			// NOTE: chain.length > 2 is not working now (it's for s[...][...]geos;)
-			state.chain = null; //							    12	 3tail
-			state.style = null;
-			state.tail = null;
-			state.tokenize = function (stream, state) {
-				var e = false,
-					c,
-					i = 0;
-				while ((c = stream.next())) {
-					if (c === chain[i] && !e) {
-						if (chain[++i] !== undefined) {
-							state.chain = chain[i];
-							state.style = style;
-							state.tail = tail;
-						} else if (tail) stream.eatWhile(tail);
-						state.tokenize = tokener || tokenPerl;
-						return style;
-					}
-					e = !e && c == '\\';
-				}
-				return style;
-			};
-			return state.tokenize(stream, state);
-		}
-
-		function tokenSOMETHING(stream, state, string) {
-			state.tokenize = function (stream, state) {
-				if (stream.string == string) state.tokenize = tokenPerl;
-				stream.skipToEnd();
-				return 'string';
-			};
-			return state.tokenize(stream, state);
-		}
-
-		// EV3 block formatting
-		function tokenEV3(stream, state, string, style, prevState) {
-			state.tokenize = function (stream, state) {
-				if (prevState && prevState.mode == 'math') {
-					var reg = new RegExp('^\\\\' + string);
-				} else {
-					var reg = new RegExp('^' + string);
-				}
-				if (stream.match(reg)) {
-					if (!prevState) {
-						state.tokenize = tokenPerl;
-						return PGstyle;
-					} else {
-						state.tokenize = function (stream, state) {
-							return tokenEV3(stream, state, prevState.string, prevState.style, prevState.prevState);
-						};
-					}
-					if (string.includes('BOLD')) return PGstyle + ' strong';
-					if (string.includes('ITALIC')) return PGstyle + ' em';
-					if (prevState.endstyle) return prevState.endstyle;
-					return style;
-				} else {
-					state.tokenize = function (stream, state) {
-						return tokenEV3(stream, state, string, style, prevState);
-					};
-				}
-
-				const newPrevState = {};
-				if (prevState) {
-					newPrevState.prevState = JSON.parse(JSON.stringify(prevState));
-				} else {
-					newPrevState.prevState = null;
-				}
-				newPrevState.style = style;
-				newPrevState.string = string;
-
-				if (prevState && prevState.mode == 'cmd') {
-					// Some additional formatting for perl code blocks
-					newPrevState.mode = 'cmd';
-					if (stream.match(/^[$@%]{/)) {
-						// ${, @{, %{ nested blocks
-						style = 'variable';
-						state.tokenize = function (stream, state) {
-							return tokenEV3(stream, state, '\\}', style, newPrevState);
-						};
-						return style;
-					}
-					if (stream.match(/^\(/)) {
-						// Nested ( ) blocks
-						newPrevState.endstyle = 'variable';
-						state.tokenize = function (stream, state) {
-							return tokenEV3(stream, state, '\\)', style, newPrevState);
-						};
-						return 'variable';
-					}
-					if (stream.match(/^\[/)) {
-						// Nested [ ] blocks
-						newPrevState.endstyle = 'variable';
-						state.tokenize = function (stream, state) {
-							return tokenEV3(stream, state, '\\]', style, newPrevState);
-						};
-						return 'variable';
-					}
-					if (stream.match(/^\{/)) {
-						// Nested { } blocks
-						newPrevState.endstyle = 'variable';
-						state.tokenize = function (stream, state) {
-							return tokenEV3(stream, state, '\\}', style, newPrevState);
-						};
-						return 'variable';
-					}
-					if (stream.match(/^\w+/)) {
-						// Check for PG keywords
-						if (PGcmds.has(stream.current())) return PGkeyword;
-						else return style;
-					}
-					if (stream.match(/^['"]/)) {
-						// Quotes
-						return tokenChain(stream, state, [stream.current()], 'string', null, function (stream, state) {
-							tokenEV3(stream, state, string, style, prevState);
-						});
-					}
-					if (stream.match(/^[=,;/\*><%&|.~?:+/-]/)) {
-						// Catch some perl operators
-						return 'variable';
-					}
-				}
-
-				if (stream.match(/^\\\(/)) {
-					// \(...\) TeX block
-					if (prevState) {
-						style = 'error';
-					} else {
-						style = 'comment';
-					}
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'math';
-						return tokenEV3(stream, state, '\\)', style, newPrevState);
-					};
-				} else if (stream.match(/^\\\[/)) {
-					// \[...\] TeX block
-					if (prevState) {
-						style = 'error';
-					} else {
-						style = 'comment';
-					}
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'math';
-						return tokenEV3(stream, state, '\\]', style, newPrevState);
-					};
-				} else if (stream.match(/^\\{/)) {
-					// \{...\} Perl code block
-					if (prevState) {
-						style = 'error';
-					} else {
-						style = 'variable-2';
-					}
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'cmd';
-						return tokenEV3(stream, state, '\\\\}', style, newPrevState);
-					};
-				} else if (stream.match(/^``/)) {
-					// ``...`` math object math
-					if (prevState && prevState.mode != 'math') {
-						style = 'error';
-					} else {
-						style = 'variable-3';
-					}
-					state.tokenize = function (stream, state) {
-						return tokenEV3(stream, state, '``', style, newPrevState);
-					};
-				} else if (stream.match(/^`/)) {
-					// `...` math object math
-					if (prevState && prevState.mode != 'math') {
-						style = 'error';
-					} else {
-						style = 'variable-3';
-					}
-					state.tokenize = function (stream, state) {
-						return tokenEV3(stream, state, '`([^`]|$)', style, newPrevState, 'tick');
-					};
-				} else if (stream.match(/^(\$BBOLD|\${BBOLD})/)) {
-					// Bold
-					style = style = ' strong';
-					state.tokenize = function (stream, state) {
-						return tokenEV3(stream, state, '(\\$EBOLD|\\${EBOLD})', style, newPrevState);
-					};
-					return PGstyle + ' strong';
-				} else if (stream.match(/^(\$BITALIC|\${BITALIC})/)) {
-					// Italic
-					style = style + ' em';
-					state.tokenize = function (stream, state) {
-						return tokenEV3(stream, state, '(\\$EITALIC|\\${EITALIC})', style, newPrevState);
-					};
-					return PGstyle + ' em';
-				} else if (stream.match(/^[$@%]\w+/)) {
-					// PG Variables
-					if (PGvars.has(stream.current().substring(1))) return PGstyle;
-					return 'variable';
-				} else if (stream.match(/^[$@%]{\w+}/)) {
-					// ${foo} PG variables
-					if (PGvars.has(stream.current().slice(2, -1))) return PGstyle;
-					return 'variable';
-				} else if (stream.match(/^ +$/)) {
-					// Trailing white space
-					return 'trailingspace';
-				} else if (stream.match(/^[\[\]\\ (){}$@%`]/)) {
-					// Advance a single character if special
-					return style;
-				} else {
-					// Otherwise advance through all non special characters
-					if (prevState && prevState.mode == 'cmd') {
-						// Only eat through words in perl code mode
-						if (stream.match(/\w+/)) return style;
-						else stream.next();
-					} else {
-						stream.eatWhile(/[^\[\]\\ (){}$@%`]/);
-					}
-				}
-				return style;
-			};
-			return state.tokenize(stream, state);
-		}
-
-		// No additional formatting inside comment block, only looks for end string.
-		// Currently only used for comments and ``` code blocks.
-		// The final stream.match and stream.eatWhile may need updated if used for other blocks.
-		function tokenPGMLComment(stream, state, string, style, prevState) {
-			state.tokenize = function (stream, state) {
-				var reg = new RegExp('^' + string);
-				if (stream.match(reg)) {
-					state.tokenize = function (stream, state) {
-						return tokenPGML(stream, state, prevState.string, prevState.style, prevState.prevState);
-					};
-					return style;
-				} else {
-					state.tokenize = function (stream, state) {
-						return tokenPGMLComment(stream, state, string, style, prevState);
-					};
-				}
-				if (stream.match(/^[\]%`]/)) return style;
-				stream.eatWhile(/[^\]%`]/);
-				return style;
-			};
-			return state.tokenize(stream, state);
-		}
-
-		// PGML subblock which has limited formatting options compared to main block.
-		// This block nests {} and [] blocks, for correct pairing in variables and commands.
-		function tokenPGMLSubBlock(stream, state, string, style, prevState) {
-			state.tokenize = function (stream, state) {
-				var reg = new RegExp('^' + string);
-				if (stream.match(reg)) {
-					// Needed to ensure ':   ' verbatim lines exit out if ended with a secondary subblock.
-					if (stream.eol() && prevState.subblock && prevState.prevState && prevState.prevState.stopeol) {
-						state.tokenize = function (stream, state) {
-							return tokenPGMLSubBlock(
-								stream,
-								state,
-								prevState.prevState.string,
-								prevState.prevState.style,
-								prevState.prevState.prevState
-							);
-						};
-					} else if (stream.eol() && prevState.prevState && prevState.prevState.stopeol) {
-						state.tokenize = function (stream, state) {
-							return tokenPGML(
-								stream,
-								state,
-								prevState.prevState.string,
-								prevState.prevState.style,
-								prevState.prevState.prevState
-							);
-						};
-					} else if (prevState.subblock) {
-						state.tokenize = function (stream, state) {
-							return tokenPGMLSubBlock(
-								stream,
-								state,
-								prevState.string,
-								prevState.style,
-								prevState.prevState
-							);
-						};
-					} else {
-						state.tokenize = function (stream, state) {
-							return tokenPGML(stream, state, prevState.string, prevState.style, prevState.prevState);
-						};
-					}
-					if (prevState.mode == 'var' || prevState.mode == 'cmd') stream.match(/^\*{1,3}([^\*]|$)/);
-					if (prevState.mode == 'calc') {
-						if (!stream.match(/^\*(\s|$)/)) stream.match(/^\{.+\}/);
-					}
-					if (prevState.endstyle) return prevState.endstyle;
-					return style;
-				} else {
-					state.tokenize = function (stream, state) {
-						return tokenPGMLSubBlock(stream, state, string, style, prevState);
-					};
-				}
-
-				var newPrevState = {};
-				if (prevState) {
-					newPrevState.prevState = JSON.parse(JSON.stringify(prevState));
-				} else {
-					newPrevState.prevState = null;
-				}
-				newPrevState.style = style;
-				newPrevState.string = string;
-				newPrevState.subblock = true;
-				if (prevState.mode) newPrevState.mode = prevState.mode;
-
-				if (prevState.mode == 'cmd') {
-					// Some formatting for [@ ... @] blocks
-					if (stream.match(/^[$@%]\w+/)) {
-						// $, @, % variables
-						if (PGvars.has(stream.current().substring(1))) return PGstyle;
-						else return 'variable';
-					}
-					if (stream.match(/^[$@%]{\w+}/)) {
-						// ${foo}, @{foo}, %{foo} variables
-						if (PGvars.has(stream.current().slice(2, -1))) return PGstyle;
-						else return 'variable';
-					}
-					if (stream.match(/^[$@%]{/)) {
-						// ${, @{, %{ nested blocks
-						style = 'variable';
-						state.tokenize = function (stream, state) {
-							return tokenPGMLSubBlock(stream, state, '\\}', style, newPrevState);
-						};
-						return style;
-					}
-					if (stream.match(/^\(/)) {
-						// Nested ( ) blocks
-						newPrevState.endstyle = 'variable';
-						state.tokenize = function (stream, state) {
-							return tokenPGMLSubBlock(stream, state, '\\)', style, newPrevState);
-						};
-						return 'variable';
-					}
-					if (stream.match(/^\w+/)) {
-						// Check for PG keywords
-						if (PGcmds.has(stream.current())) return PGkeyword;
-						else return style;
-					}
-					if (stream.match(/^['"]/)) {
-						// Quotes
-						return tokenChain(stream, state, [stream.current()], 'string', null, function (stream, state) {
-							tokenPGMLSubBlock(stream, state, string, style, prevState);
-						});
-					}
-					if (stream.match(/^[=,;/\*><%$&|.~?:]/))
-						// Catch some perl operators
-						return 'variable';
-				}
-
-				if (stream.match(/^\[\$/)) {
-					// Variable
-					const p = stream.pos;
-					if (stream.match(/^\w+/) && PGvars.has(stream.current().substring(2)) && stream.eat(']')) {
-						stream.match(/^\*{1,3}/);
-						return PGstyle;
-					} else {
-						stream.pos = p;
-					}
-					style = 'variable';
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'var';
-						return tokenPGMLSubBlock(stream, state, '\\]', style, newPrevState);
-					};
-				} else if (stream.match(/^\[/)) {
-					// Nested [ ] blocks
-					if (prevState.mode == 'cmd') newPrevState.endstyle = 'variable';
-					state.tokenize = function (stream, state) {
-						return tokenPGMLSubBlock(stream, state, '\\]', style, newPrevState);
-					};
-					if (prevState.mode == 'cmd') return 'variable';
-				} else if (stream.match(/^\{/)) {
-					// Nested { } blocks
-					if (prevState.mode == 'cmd') newPrevState.endstyle = 'variable';
-					state.tokenize = function (stream, state) {
-						return tokenPGMLSubBlock(stream, state, '\\}', style, newPrevState);
-					};
-					if (prevState.mode == 'cmd') return 'variable';
-				} else if (stream.match(/^\w+\s*/)) {
-					// Grab next word before going forward
-					return style;
-				} else {
-					// Catchall to advanced one character if no match was found.
-					stream.eat(/./);
-				}
-				return style;
-			};
-			return state.tokenize(stream, state);
-		}
-
-		// Main PGML block. Can nest to allow subblocks with PGML formatting in them.
-		function tokenPGML(stream, state, string, style, prevState) {
-			state.tokenize = function (stream, state) {
-				var reg = new RegExp('^' + string);
-				if (stream.match(reg)) {
-					if (!prevState) {
-						state.tokenize = tokenPerl;
-						return PGkeyword;
-						// Needed to ensure ':   ' verbatim lines exit out if ended with a secondary block.
-					} else if (stream.eol() && prevState.prevState && prevState.prevState.stopeol) {
-						state.tokenize = function (stream, state) {
-							return tokenPGML(
-								stream,
-								state,
-								prevState.prevState.string,
-								prevState.prevState.style,
-								prevState.prevState.prevState
-							);
-						};
-					} else {
-						state.tokenize = function (stream, state) {
-							return tokenPGML(stream, state, prevState.string, prevState.style, prevState.prevState);
-						};
-					}
-					return style;
-				} else {
-					state.tokenize = function (stream, state) {
-						return tokenPGML(stream, state, string, style, prevState);
-					};
-				}
-
-				var newPrevState = {};
-				if (prevState) {
-					newPrevState.prevState = JSON.parse(JSON.stringify(prevState));
-				} else {
-					newPrevState.prevState = null;
-				}
-				newPrevState.style = style;
-				newPrevState.string = string;
-
-				if (stream.sol()) {
-					if (
-						stream.match(/^ *(>> +)?[ivxlIVXL]+[.)] /) ||
-						stream.match(/^ *(>> +)?\d+[.)] /) ||
-						stream.match(/^ *(>> +)?\w[.)] /) ||
-						stream.match(/^ *(>> +)?[*\-+o] /)
-					) {
-						// Lists
-						return 'atom strong';
-					}
-					if (stream.match(/^ *[\-=]{3,}/)) {
-						// Rules
-						stream.match(/^\{[^}]*\}/);
-						stream.match(/^\{[^}]*\}/);
-						return 'hr';
-					}
-					if (stream.match(/^ *(>> +)?#{1,}.*$/))
-						// Headers
-						return 'header';
-					if (stream.match(/^ *>> /))
-						// Justification
-						return 'atom strong';
-					if (stream.match(/^ *:   /)) {
-						// Single line verbatim
-						style = 'tag';
-						state.tokenize = function (stream, state) {
-							newPrevState.stopeol = true;
-							return tokenPGML(stream, state, '.$', style, newPrevState);
-						};
-						return style;
-					}
-				}
-
-				if (stream.match(/^\[:{1,3}/)) {
-					// Algebra notation math
-					style = 'variable-3';
-					const endstring = stream.current().substring(1) + '\\]';
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'calc';
-						return tokenPGMLSubBlock(stream, state, endstring, style, newPrevState);
-					};
-				} else if (stream.match(/^\[`{1,3}/)) {
-					// TeX notation math
-					style = 'comment';
-					const endstring = stream.current().substring(1) + '\\]';
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'tex';
-						return tokenPGMLSubBlock(stream, state, endstring, style, newPrevState);
-					};
-				} else if (stream.match(/^\[\|+/)) {
-					// Verbatim
-					style = 'tag';
-					const endstring = stream.current().substring(1) + '\\]';
-					state.tokenize = function (stream, state) {
-						return tokenPGML(stream, state, endstring, style, newPrevState);
-					};
-				} else if (!prevState && stream.match(/^```/)) {
-					// Multiline verbatim / code
-					style = 'tag';
-					state.tokenize = function (stream, state) {
-						return tokenPGMLComment(stream, state, '```', style, newPrevState);
-					};
-				} else if (stream.match(/^\[%/)) {
-					// Comment
-					style = 'comment';
-					state.tokenize = function (stream, state) {
-						return tokenPGMLComment(stream, state, '%\\]', style, newPrevState);
-					};
-				} else if (stream.match(/^\[@/)) {
-					// Perl code
-					style = 'variable-2';
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'cmd';
-						return tokenPGMLSubBlock(stream, state, '@\\]', style, newPrevState);
-					};
-				} else if (stream.match(/^\[\$/)) {
-					// Variable
-					const p = stream.pos;
-					if (stream.match(/^[\w\d_]+/) && PGvars.has(stream.current().substring(2)) && stream.eat(']')) {
-						stream.match(/^\*{1,3}/);
-						return PGstyle;
-					} else {
-						stream.pos = p;
-					}
-					style = 'variable';
-					state.tokenize = function (stream, state) {
-						newPrevState.mode = 'var';
-						return tokenPGMLSubBlock(stream, state, '\\]', style, newPrevState);
-					};
-				} else if (stream.match(/^\[_+\]/)) {
-					// Answer blank
-					if (stream.match(/^\*?\{/)) {
-						state.tokenize = function (stream, state) {
-							return tokenPGMLSubBlock(stream, state, '\\}', 'builtin', newPrevState);
-						};
-					}
-					return 'builtin';
-				} else if (stream.match(/<< *$/)) {
-					// Justification
-					return 'atom strong';
-				} else if (stream.match(/^(\*_|_\*)\w/)) {
-					// Bold and italic
-					style = style + ' strong em';
-					const endstring = (stream.current().charAt(1) + stream.current().charAt(0)).replace(/\*/, '\\*');
-					state.tokenize = function (stream, state) {
-						return tokenPGML(stream, state, endstring, style, newPrevState);
-					};
-				} else if (stream.match(/^\*{1,3}\w/)) {
-					// Bold
-					style = style + ' strong';
-					const endstring = stream.current().slice(0, -1).replace(/\*/g, '\\*');
-					state.tokenize = function (stream, state) {
-						return tokenPGML(stream, state, endstring, style, newPrevState);
-					};
-				} else if (stream.match(/^_{1,3}\w/)) {
-					// Italic
-					style = style + ' em';
-					const endstring = stream.current().slice(0, -1);
-					state.tokenize = function (stream, state) {
-						return tokenPGML(stream, state, endstring, style, newPrevState);
-					};
-				} else if (stream.match(/^ +$/)) {
-					// Trailing whitespace
-					return 'trailingspace';
-				} else if (stream.match(/[A-Za-z0-9]+\s*/)) {
-					// Grab next word before going forward
-					return style;
-				} else {
-					// Catchall to advanced one character if no match was found.
-					stream.eat(/./);
-				}
-				return style;
-			};
-
-			return state.tokenize(stream, state);
-		}
-
-		function tokenPerl(stream, state) {
-			if (stream.eatSpace()) return null;
-			if (state.chain) return tokenChain(stream, state, state.chain, state.style, state.tail);
-			if (
-				stream.match(
-					/^(\-?((\d[\d_]*)?\.\d+(e[+-]?\d+)?|\d+\.\d*)|0x[\da-fA-F_]+|0b[01_]+|\d[\d_]*(e[+-]?\d+)?)/
-				)
-			)
-				return 'number';
-			if (stream.match(/^<<(?=[_a-zA-Z])/)) {
-				// NOTE: <<SOMETHING\n...\nSOMETHING\n
-				stream.eatWhile(/\w/);
-				return tokenSOMETHING(stream, state, stream.current().substr(2));
-			}
-			if (stream.sol() && stream.match(/^\=item(?!\w)/)) {
-				// NOTE: \n=item...\n=cut\n
-				return tokenSOMETHING(stream, state, '=cut');
-			}
-
-			if (stream.match(/^BEGIN_TEXT\s*$/)) {
-				state.tokenize = function (stream, state) {
-					return tokenEV3(stream, state, 'END_TEXT', 'meta');
-				};
-				return PGkeyword;
-			}
-			if (stream.match(/^BEGIN_HINT\s*$/)) {
-				state.tokenize = function (stream, state) {
-					return tokenEV3(stream, state, 'END_HINT', 'meta');
-				};
-				return PGkeyword;
-			}
-			if (stream.match(/^BEGIN_SOLUTION\s*$/)) {
-				state.tokenize = function (stream, state) {
-					return tokenEV3(stream, state, 'END_SOLUTION', 'meta');
-				};
-				return PGkeyword;
-			}
-			if (stream.match(/^BEGIN_PGML\s*$/)) {
-				state.tokenize = function (stream, state) {
-					return tokenPGML(stream, state, 'END_PGML', 'meta');
-				};
-				return PGkeyword;
-			}
-			if (stream.match(/^BEGIN_PGML_HINT\s*$/)) {
-				state.tokenize = function (stream, state) {
-					return tokenPGML(stream, state, 'END_PGML_HINT', 'meta');
-				};
-				return PGkeyword;
-			}
-			if (stream.match(/^BEGIN_PGML_SOLUTION\s*$/)) {
-				state.tokenize = function (stream, state) {
-					return tokenPGML(stream, state, 'END_PGML_SOLUTION', 'meta');
-				};
-				return PGkeyword;
-			}
-
-			var ch = stream.next();
-			if (ch == '"' || ch == "'") {
-				// NOTE: ' or " or <<'SOMETHING'\n...\nSOMETHING\n or <<"SOMETHING"\n...\nSOMETHING\n
-				if (prefix(stream, 3) == '<<' + ch) {
-					var p = stream.pos;
-					stream.eatWhile(/\w/);
-					var n = stream.current().substr(1);
-					if (n && stream.eat(ch)) return tokenSOMETHING(stream, state, n);
-					stream.pos = p;
-				}
-				return tokenChain(stream, state, [ch], 'string');
-			}
-			if (ch == 'q') {
-				var c = look(stream, -2);
-				if (!(c && /\w/.test(c))) {
-					c = look(stream, 0);
-					if (c == 'x') {
-						c = look(stream, 1);
-						if (c == '(') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [')'], RXstyle, RXmodifiers);
-						}
-						if (c == '[') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [']'], RXstyle, RXmodifiers);
-						}
-						if (c == '{') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['}'], RXstyle, RXmodifiers);
-						}
-						if (c == '<') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['>'], RXstyle, RXmodifiers);
-						}
-						if (/[\^'"!~\/]/.test(c)) {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, [stream.eat(c)], RXstyle, RXmodifiers);
-						}
-					} else if (c == 'q') {
-						c = look(stream, 1);
-						if (c == '(') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [')'], 'string');
-						}
-						if (c == '[') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [']'], 'string');
-						}
-						if (c == '{') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['}'], 'string');
-						}
-						if (c == '<') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['>'], 'string');
-						}
-						if (/[\^'"!~\/]/.test(c)) {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, [stream.eat(c)], 'string');
-						}
-					} else if (c == 'w') {
-						c = look(stream, 1);
-						if (c == '(') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [')'], 'bracket');
-						}
-						if (c == '[') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [']'], 'bracket');
-						}
-						if (c == '{') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['}'], 'bracket');
-						}
-						if (c == '<') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['>'], 'bracket');
-						}
-						if (/[\^'"!~\/]/.test(c)) {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, [stream.eat(c)], 'bracket');
-						}
-					} else if (c == 'r') {
-						c = look(stream, 1);
-						if (c == '(') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [')'], RXstyle, RXmodifiers);
-						}
-						if (c == '[') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, [']'], RXstyle, RXmodifiers);
-						}
-						if (c == '{') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['}'], RXstyle, RXmodifiers);
-						}
-						if (c == '<') {
-							eatSuffix(stream, 2);
-							return tokenChain(stream, state, ['>'], RXstyle, RXmodifiers);
-						}
-						if (/[\^'"!~\/]/.test(c)) {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, [stream.eat(c)], RXstyle, RXmodifiers);
-						}
-					} else if (/[\^'"!~\/(\[{<]/.test(c)) {
-						if (c == '(') {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, [')'], 'string');
-						}
-						if (c == '[') {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, [']'], 'string');
-						}
-						if (c == '{') {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, ['}'], 'string');
-						}
-						if (c == '<') {
-							eatSuffix(stream, 1);
-							return tokenChain(stream, state, ['>'], 'string');
-						}
-						if (/[\^'"!~\/]/.test(c)) {
-							return tokenChain(stream, state, [stream.eat(c)], 'string');
-						}
-					}
-				}
-			}
-			if (ch == 'm') {
-				var c = look(stream, -2);
-				if (!(c && /\w/.test(c))) {
-					c = stream.eat(/[(\[{<\^'"!~\/]/);
-					if (c) {
-						if (/[\^'"!~\/]/.test(c)) {
-							return tokenChain(stream, state, [c], RXstyle, RXmodifiers);
-						}
-						if (c == '(') {
-							return tokenChain(stream, state, [')'], RXstyle, RXmodifiers);
-						}
-						if (c == '[') {
-							return tokenChain(stream, state, [']'], RXstyle, RXmodifiers);
-						}
-						if (c == '{') {
-							return tokenChain(stream, state, ['}'], RXstyle, RXmodifiers);
-						}
-						if (c == '<') {
-							return tokenChain(stream, state, ['>'], RXstyle, RXmodifiers);
-						}
-					}
-				}
-			}
-			if (ch == 's') {
-				var c = /[\/>\]})\w]/.test(look(stream, -2));
-				if (!c) {
-					c = stream.eat(/[(\[{<\^'"!~\/]/);
-					if (c) {
-						if (c == '[') return tokenChain(stream, state, [']', ']'], RXstyle, RXmodifiers);
-						if (c == '{') return tokenChain(stream, state, ['}', '}'], RXstyle, RXmodifiers);
-						if (c == '<') return tokenChain(stream, state, ['>', '>'], RXstyle, RXmodifiers);
-						if (c == '(') return tokenChain(stream, state, [')', ')'], RXstyle, RXmodifiers);
-						return tokenChain(stream, state, [c, c], RXstyle, RXmodifiers);
-					}
-				}
-			}
-			if (ch == 'y') {
-				var c = /[\/>\]})\w]/.test(look(stream, -2));
-				if (!c) {
-					c = stream.eat(/[(\[{<\^'"!~\/]/);
-					if (c) {
-						if (c == '[') return tokenChain(stream, state, [']', ']'], RXstyle, RXmodifiers);
-						if (c == '{') return tokenChain(stream, state, ['}', '}'], RXstyle, RXmodifiers);
-						if (c == '<') return tokenChain(stream, state, ['>', '>'], RXstyle, RXmodifiers);
-						if (c == '(') return tokenChain(stream, state, [')', ')'], RXstyle, RXmodifiers);
-						return tokenChain(stream, state, [c, c], RXstyle, RXmodifiers);
-					}
-				}
-			}
-			if (ch == 't') {
-				var c = /[\/>\]})\w]/.test(look(stream, -2));
-				if (!c) {
-					c = stream.eat('r');
-					if (c) {
-						c = stream.eat(/[(\[{<\^'"!~\/]/);
-						if (c) {
-							if (c == '[') return tokenChain(stream, state, [']', ']'], RXstyle, RXmodifiers);
-							if (c == '{') return tokenChain(stream, state, ['}', '}'], RXstyle, RXmodifiers);
-							if (c == '<') return tokenChain(stream, state, ['>', '>'], RXstyle, RXmodifiers);
-							if (c == '(') return tokenChain(stream, state, [')', ')'], RXstyle, RXmodifiers);
-							return tokenChain(stream, state, [c, c], RXstyle, RXmodifiers);
-						}
-					}
-				}
-			}
-			if (ch == '`') {
-				return tokenChain(stream, state, [ch], 'variable-2');
-			}
-			if (ch == '/') {
-				if (!/~\s*$/.test(prefix(stream))) return 'operator';
-				else return tokenChain(stream, state, [ch], RXstyle, RXmodifiers);
-			}
-			if (ch == '$') {
-				var p = stream.pos;
-				if (stream.eatWhile(/\w/) && PGvars.has(stream.current().substring(1))) return PGstyle;
-				else stream.pos = p;
-				if (stream.eatWhile(/\d/) || (stream.eat('{') && stream.eatWhile(/\d/) && stream.eat('}')))
-					return 'variable-2';
-				else stream.pos = p;
-			}
-			if (/[$@%]/.test(ch)) {
-				var p = stream.pos;
-				if (
-					(stream.eat('^') && stream.eat(/[A-Z]/)) ||
-					(!/[@$%&]/.test(look(stream, -2)) && stream.eat(/[=|\\\-#?@;:&`~\^!\[\]*'"$+.,\/<>()]/))
-				) {
-					var c = stream.current();
-					if (PERL[c]) return 'variable-2';
-				}
-				stream.pos = p;
-			}
-			if (/[$@%&]/.test(ch)) {
-				if (stream.eatWhile(/[\w$]/) || (stream.eat('{') && stream.eatWhile(/[\w$]/) && stream.eat('}'))) {
-					var c = stream.current();
-					if (PERL[c]) return 'variable-2';
-					else return 'variable';
-				}
-			}
-			if (ch == '#') {
-				if (look(stream, -2) != '$') {
-					stream.skipToEnd();
-					return 'comment';
-				}
-			}
-			if (ch == '-' && look(stream, -2) != ' ' && stream.match(/>\w+/)) return 'variable';
-			if (/[:+\-\^*$&%@=<>!?|\/~\.]/.test(ch)) {
-				var p = stream.pos;
-				stream.eatWhile(/[:+\-\^*$&%@=<>!?|\/~\.]/);
-				if (PERL[stream.current()]) return 'operator';
-				else stream.pos = p;
-			}
-			if (ch == '_') {
-				if (stream.pos == 1) {
-					if (suffix(stream, 6) == '_END__') {
-						return tokenChain(stream, state, ['\0'], 'comment');
-					} else if (suffix(stream, 7) == '_DATA__') {
-						return tokenChain(stream, state, ['\0'], 'variable-2');
-					} else if (suffix(stream, 7) == '_C__') {
-						return tokenChain(stream, state, ['\0'], 'string');
-					}
-				}
-			}
-			if (/\w/.test(ch)) {
-				var p = stream.pos;
-				if (
-					look(stream, -2) == '{' &&
-					(look(stream, 0) == '}' || (stream.eatWhile(/\w/) && look(stream, 0) == '}'))
-				)
-					return 'string';
-				else stream.pos = p;
-				if (stream.match(/\w* *=>/)) return 'string';
-			}
-			if (/[A-Z]/.test(ch)) {
-				var l = look(stream, -2);
-				var p = stream.pos;
-				stream.eatWhile(/[A-Z_]/);
-				if (/[\da-z]/.test(look(stream, 0))) {
-					stream.pos = p;
-				} else {
-					var c = PERL[stream.current()];
-					var isPG = PGcmds.has(stream.current());
-					if (!c && !isPG) return 'meta';
-					if (isPG) return PGkeyword;
-					if (c[1]) c = c[0];
-					if (l != ':') {
-						if (c == 1) return 'keyword';
-						else if (c == 2) return 'def';
-						else if (c == 3) return 'atom';
-						else if (c == 4) return 'operator';
-						else if (c == 5) return 'variable-2';
-						else return 'meta';
-					} else return 'meta';
-				}
-			}
-			if (/[a-zA-Z_]/.test(ch)) {
-				var l = look(stream, -2);
-				stream.eatWhile(/\w/);
-				var c = PERL[stream.current()];
-				var isPG = PGcmds.has(stream.current());
-				if (!c && !isPG) return 'meta';
-				if (isPG) return PGkeyword;
-				if (c[1]) c = c[0];
-				if (l != ':') {
-					if (c == 1) return 'keyword';
-					else if (c == 2) return 'def';
-					else if (c == 3) return 'atom';
-					else if (c == 4) return 'operator';
-					else if (c == 5) return 'variable-2';
-					else return 'meta';
-				} else return 'meta';
-			}
-			return null;
-		}
-
-		return {
-			startState: function () {
-				return {
-					tokenize: tokenPerl,
-					chain: null,
-					style: null,
-					tail: null
-				};
-			},
-			token: function (stream, state) {
-				return (state.tokenize || tokenPerl)(stream, state);
-			},
-			lineComment: '#'
-		};
-	});
-
-	CodeMirror.registerHelper('wordChars', 'perl', /[\w$]/);
-
-	CodeMirror.registerHelper('fold', 'PG', (cm, start) => {
-		const m1 =
-			/^\s*BEGIN_(PGML|PGML_SOLUTION|PGML_HINT|TEXT)\s*$/.exec(cm.getLine(start.line)) ||
-			/^\s*[$\w]*\s*->\s*BEGIN_(TIKZ|LATEX_IMAGE)\s*$/.exec(cm.getLine(start.line));
-		const m2 = /^\s*(Section|Scaffold)::Begin/.exec(cm.getLine(start.line));
-		if (m1 || m2) {
-			for (let current_line = start.line + 1; current_line <= cm.lineCount(); ++current_line) {
-				const end_re = m1 ? RegExp(`END_${m1[1]}`) : RegExp(`${m2[1]}::End`);
-				if (end_re.test(cm.getLine(current_line))) {
-					return {
-						from: CodeMirror.Pos(start.line, cm.getLine(start.line).length),
-						to: CodeMirror.Pos(current_line, cm.getLine(current_line).length)
-					};
-				}
-			}
-		}
-		return;
-	});
-
-	CodeMirror.defineMIME('text/x-perl', 'perl');
-
-	// it's like "peek", but need for look-ahead or look-behind if index < 0
-	function look(stream, c) {
-		return stream.string.charAt(stream.pos + (c || 0));
-	}
-
-	// return a part of prefix of current stream from current position
-	function prefix(stream, c) {
-		if (c) {
-			var x = stream.pos - c;
-			return stream.string.substr(x >= 0 ? x : 0, c);
-		} else {
-			return stream.string.substr(0, stream.pos - 1);
-		}
-	}
-
-	// return a part of suffix of current stream from current position
-	function suffix(stream, c) {
-		var y = stream.string.length;
-		var x = y - stream.pos + 1;
-		return stream.string.substr(stream.pos, c && c < y ? c : x);
-	}
-
-	// eating and vomiting a part of stream from current position
-	function eatSuffix(stream, c) {
-		var x = stream.pos + c;
-		var y;
-		if (x <= 0) stream.pos = 0;
-		else if (x >= (y = stream.string.length - 1)) stream.pos = y;
-		else stream.pos = x;
-	}
-})();
diff --git a/htdocs/js/PGCodeMirror/comment.js b/htdocs/js/PGCodeMirror/comment.js
deleted file mode 100644
index 356b9ce146..0000000000
--- a/htdocs/js/PGCodeMirror/comment.js
+++ /dev/null
@@ -1,287 +0,0 @@
-// CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: https://codemirror.net/5/LICENSE
-
-(function (mod) {
-	if (typeof exports == 'object' && typeof module == 'object')
-		// CommonJS
-		mod(require('../../lib/codemirror'));
-	else if (typeof define == 'function' && define.amd)
-		// AMD
-		define(['../../lib/codemirror'], mod);
-	// Plain browser env
-	else mod(CodeMirror);
-})(function (CodeMirror) {
-	'use strict';
-
-	var noOptions = {};
-	var nonWS = /[^\s\u00a0]/;
-	var Pos = CodeMirror.Pos,
-		cmp = CodeMirror.cmpPos;
-
-	function firstNonWS(str) {
-		var found = str.search(nonWS);
-		return found == -1 ? 0 : found;
-	}
-
-	CodeMirror.commands.toggleComment = function (cm) {
-		cm.toggleComment();
-	};
-
-	CodeMirror.defineExtension('toggleComment', function (options) {
-		if (!options) options = noOptions;
-		var cm = this;
-		var minLine = Infinity,
-			ranges = this.listSelections(),
-			mode = null;
-		for (var i = ranges.length - 1; i >= 0; i--) {
-			var from = ranges[i].from(),
-				to = ranges[i].to();
-			if (from.line >= minLine) continue;
-			if (to.line >= minLine) to = Pos(minLine, 0);
-			minLine = from.line;
-			if (mode == null) {
-				if (cm.uncomment(from, to, options)) mode = 'un';
-				else {
-					cm.lineComment(from, to, options);
-					mode = 'line';
-				}
-			} else if (mode == 'un') {
-				cm.uncomment(from, to, options);
-			} else {
-				cm.lineComment(from, to, options);
-			}
-		}
-	});
-
-	// Rough heuristic to try and detect lines that are part of multi-line string
-	function probablyInsideString(cm, pos, line) {
-		return /\bstring\b/.test(cm.getTokenTypeAt(Pos(pos.line, 0))) && !/^[\'\"\`]/.test(line);
-	}
-
-	const md_section = RegExp(
-		'DESCRIPTION|KEYWORDS|DBsubject|DBchapter|DBsection|Date|Author|Institution ' +
-			'|MO|Static|TitleText|EditionText|AuthorText|Section|Problem|Language|Level'
-	);
-
-	// Custom version of getMode for PG files.
-	function getMode(cm, pos) {
-		const mode = cm.getModeAt(pos);
-		// Clear any comment fields of mode.
-		delete mode.lineComment;
-		delete mode.blockCommentStart;
-		delete mode.blockCommentEnd;
-
-		if (md_section.test(cm.getLine(pos.line)) || insideDescriptionBlock(cm, pos)) {
-			mode.lineComment = '##';
-			mode.name = 'PG_meta';
-		} else if (inPGMLBlock(cm, pos)) {
-			mode.name = 'PGML';
-			mode.blockCommentStart = '[%';
-			mode.blockCommentEnd = '%]';
-		} else if (inTikzBlock(cm, pos)) {
-			mode.lineComment = '%';
-			mode.name = 'tikz';
-		} else {
-			mode.name = 'perl';
-			mode.lineComment = '#';
-		}
-		return mode;
-	}
-
-	function insideDescriptionBlock(cm, pos) {
-		for (let line = pos.line; line >= 0; --line) {
-			if (/ENDDESCRIPTION/.test(cm.getLine(line))) return false;
-			if (/DESCRIPTION/.test(cm.getLine(line))) return true;
-		}
-		return false;
-	}
-
-	function inTikzBlock(cm, pos) {
-		for (let line = pos.line; line >= 0; --line) {
-			if (/BEGIN_TIKZ|BEGIN_LATEX_IMAGE/.test(cm.getLine(line))) return true;
-			if (/END_PGML|END_TIKZ|END_LATEX_IMAGE/.test(cm.getLine(line))) return false;
-		}
-		return false;
-	}
-
-	function inPGMLBlock(cm, pos) {
-		for (let line = pos.line; line >= 0; --line) {
-			if (/BEGIN_PGML/.test(cm.getLine(line))) return true;
-			if (/END_PGML/.test(cm.getLine(line))) return false;
-		}
-		return false;
-	}
-
-	CodeMirror.defineExtension('lineComment', function (from, to, options) {
-		if (!options) options = noOptions;
-		var self = this,
-			mode = getMode(self, from);
-		var firstLine = self.getLine(from.line);
-		if (firstLine == null || probablyInsideString(self, from, firstLine)) return;
-
-		var commentString = options.lineComment || mode.lineComment;
-		if (!commentString) {
-			if (options.blockCommentStart || mode.blockCommentStart) {
-				options.fullLines = true;
-				self.blockComment(from, to, options);
-			}
-			return;
-		}
-
-		var end = Math.min(to.ch != 0 || to.line == from.line ? to.line + 1 : to.line, self.lastLine() + 1);
-		var pad = options.padding == null ? ' ' : options.padding;
-		var blankLines = options.commentBlankLines || from.line == to.line;
-
-		self.operation(function () {
-			if (options.indent) {
-				var baseString = null;
-				for (var i = from.line; i < end; ++i) {
-					var line = self.getLine(i);
-					var whitespace = line.search(nonWS) === -1 ? line : line.slice(0, firstNonWS(line));
-					if (baseString == null || baseString.length > whitespace.length) {
-						baseString = whitespace;
-					}
-				}
-				for (var i = from.line; i < end; ++i) {
-					var line = self.getLine(i),
-						cut = baseString.length;
-					if (!blankLines && !nonWS.test(line)) continue;
-					if (line.slice(0, cut) != baseString) cut = firstNonWS(line);
-					self.replaceRange(baseString + commentString + pad, Pos(i, 0), Pos(i, cut));
-				}
-			} else {
-				for (var i = from.line; i < end; ++i) {
-					if (blankLines || nonWS.test(self.getLine(i))) self.replaceRange(commentString + pad, Pos(i, 0));
-				}
-			}
-		});
-	});
-
-	CodeMirror.defineExtension('blockComment', function (from, to, options) {
-		if (!options) options = noOptions;
-		var self = this,
-			mode = getMode(self, from);
-		var startString = options.blockCommentStart || mode.blockCommentStart;
-		var endString = options.blockCommentEnd || mode.blockCommentEnd;
-		if (!startString || !endString) {
-			if ((options.lineComment || mode.lineComment) && options.fullLines != false)
-				self.lineComment(from, to, options);
-			return;
-		}
-		if (/\bcomment\b/.test(self.getTokenTypeAt(Pos(from.line, 0)))) return;
-
-		var end = Math.min(to.line, self.lastLine());
-		if (end != from.line && to.ch == 0 && nonWS.test(self.getLine(end))) --end;
-
-		var pad = options.padding == null ? ' ' : options.padding;
-		if (from.line > end) return;
-
-		self.operation(function () {
-			if (options.fullLines != false) {
-				var lastLineHasText = nonWS.test(self.getLine(end));
-				self.replaceRange(pad + endString, Pos(end));
-				self.replaceRange(startString + pad, Pos(from.line, 0));
-				var lead = options.blockCommentLead || mode.blockCommentLead;
-				if (lead != null)
-					for (var i = from.line + 1; i <= end; ++i)
-						if (i != end || lastLineHasText) self.replaceRange(lead + pad, Pos(i, 0));
-			} else {
-				var atCursor = cmp(self.getCursor('to'), to) == 0,
-					empty = !self.somethingSelected();
-				self.replaceRange(endString, to);
-				if (atCursor) self.setSelection(empty ? to : self.getCursor('from'), to);
-				self.replaceRange(startString, from);
-			}
-		});
-	});
-
-	CodeMirror.defineExtension('uncomment', function (from, to, options) {
-		if (!options) options = noOptions;
-		var self = this,
-			mode = getMode(self, from);
-		var end = Math.min(to.ch != 0 || to.line == from.line ? to.line : to.line - 1, self.lastLine()),
-			start = Math.min(from.line, end);
-
-		// Try finding line comments
-		var lineString = options.lineComment || mode.lineComment,
-			lines = [];
-		var pad = options.padding == null ? ' ' : options.padding,
-			didSomething;
-		lineComment: {
-			if (!lineString) break lineComment;
-			for (var i = start; i <= end; ++i) {
-				var line = self.getLine(i);
-				var found = line.indexOf(lineString);
-				if (found > -1 && !/comment/.test(self.getTokenTypeAt(Pos(i, found + 1)))) found = -1;
-				if (found == -1 && nonWS.test(line)) break lineComment;
-				if (found > -1 && nonWS.test(line.slice(0, found))) break lineComment;
-				lines.push(line);
-			}
-			self.operation(function () {
-				for (var i = start; i <= end; ++i) {
-					var line = lines[i - start];
-					var pos = line.indexOf(lineString),
-						endPos = pos + lineString.length;
-					if (pos < 0) continue;
-					if (line.slice(endPos, endPos + pad.length) == pad) endPos += pad.length;
-					didSomething = true;
-					self.replaceRange('', Pos(i, pos), Pos(i, endPos));
-				}
-			});
-			if (didSomething) return true;
-		}
-
-		// Try block comments
-		var startString = options.blockCommentStart || mode.blockCommentStart;
-		var endString = options.blockCommentEnd || mode.blockCommentEnd;
-		if (!startString || !endString) return false;
-		var lead = options.blockCommentLead || mode.blockCommentLead;
-		var startLine = self.getLine(start),
-			open = startLine.indexOf(startString);
-		if (open == -1) return false;
-		var endLine = end == start ? startLine : self.getLine(end);
-		var close = endLine.indexOf(endString, end == start ? open + startString.length : 0);
-		var insideStart = Pos(start, open + 1),
-			insideEnd = Pos(end, close + 1);
-		if (
-			close == -1 ||
-			!/comment/.test(self.getTokenTypeAt(insideStart)) ||
-			!/comment/.test(self.getTokenTypeAt(insideEnd)) ||
-			self.getRange(insideStart, insideEnd, '\n').indexOf(endString) > -1
-		)
-			return false;
-
-		// Avoid killing block comments completely outside the selection.
-		// Positions of the last startString before the start of the selection, and the first endString after it.
-		var lastStart = startLine.lastIndexOf(startString, from.ch);
-		var firstEnd =
-			lastStart == -1 ? -1 : startLine.slice(0, from.ch).indexOf(endString, lastStart + startString.length);
-		if (lastStart != -1 && firstEnd != -1 && firstEnd + endString.length != from.ch) return false;
-		// Positions of the first endString after the end of the selection, and the last startString before it.
-		firstEnd = endLine.indexOf(endString, to.ch);
-		var almostLastStart = endLine.slice(to.ch).lastIndexOf(startString, firstEnd - to.ch);
-		lastStart = firstEnd == -1 || almostLastStart == -1 ? -1 : to.ch + almostLastStart;
-		if (firstEnd != -1 && lastStart != -1 && lastStart != to.ch) return false;
-
-		self.operation(function () {
-			self.replaceRange(
-				'',
-				Pos(end, close - (pad && endLine.slice(close - pad.length, close) == pad ? pad.length : 0)),
-				Pos(end, close + endString.length)
-			);
-			var openEnd = open + startString.length;
-			if (pad && startLine.slice(openEnd, openEnd + pad.length) == pad) openEnd += pad.length;
-			self.replaceRange('', Pos(start, open), Pos(start, openEnd));
-			if (lead)
-				for (var i = start + 1; i <= end; ++i) {
-					var line = self.getLine(i),
-						found = line.indexOf(lead);
-					if (found == -1 || nonWS.test(line.slice(0, found))) continue;
-					var foundEnd = found + lead.length;
-					if (pad && line.slice(foundEnd, foundEnd + pad.length) == pad) foundEnd += pad.length;
-					self.replaceRange('', Pos(i, found), Pos(i, foundEnd));
-				}
-		});
-		return true;
-	});
-});
diff --git a/htdocs/js/PGCodeMirror/pgeditor.js b/htdocs/js/PGCodeMirror/pgeditor.js
index 286cf45247..85209e4eba 100644
--- a/htdocs/js/PGCodeMirror/pgeditor.js
+++ b/htdocs/js/PGCodeMirror/pgeditor.js
@@ -12,139 +12,18 @@
  * Artistic License for more details.
  */
 
-(async function () {
-	if (!CodeMirror) return;
+(async () => {
+	const editorContainer = document.querySelector('.code-mirror-editor');
+	if (!PGCodeMirrorEditor || !editorContainer) return;
 
-	const loadResource = async (src) => {
-		return new Promise((resolve, reject) => {
-			let shouldAppend = false;
-			let el;
-			if (/\.js(?:\?[0-9a-zA-Z=^.]*)?$/.exec(src)) {
-				el = document.querySelector(`script[src="${src}"]`);
-				if (!el) {
-					el = document.createElement('script');
-					el.async = false;
-					el.src = src;
-					shouldAppend = true;
-				}
-			} else if (/\.css(?:\?[0-9a-zA-Z=^.]*)?$/.exec(src)) {
-				el = document.querySelector(`link[href="${src}"]`);
-				if (!el) {
-					el = document.createElement('link');
-					el.rel = 'stylesheet';
-					el.href = src;
-					shouldAppend = true;
-				}
-			} else {
-				reject();
-				return;
-			}
+	const editorInput = document.getElementsByName(editorContainer.id)[0];
 
-			if (el.dataset.loaded) {
-				resolve();
-				return;
-			}
+	const cm = (webworkConfig.pgCodeMirror = new PGCodeMirrorEditor.View(editorContainer, {
+		source: editorInput?.value ?? '',
+		language: editorContainer.dataset.language ?? 'pg'
+	}));
 
-			el.addEventListener('error', reject);
-			el.addEventListener('abort', reject);
-			el.addEventListener('load', () => {
-				if (el) el.dataset.loaded = 'true';
-				resolve();
-			});
+	new ResizeObserver(() => cm.refresh('window-resize')).observe(editorContainer);
 
-			if (shouldAppend) document.head.appendChild(el);
-		});
-	};
-
-	const loadConfig = async (file) => {
-		const configName =
-			[...file.matchAll(/.*\/([^.]*?)(?:\.min)?\.(?:js|css)(?:\?[0-9a-zA-Z=^.]*)?$/g)][0]?.[1] ?? 'default';
-		if (configName !== 'default') {
-			try {
-				await loadResource(file);
-			} catch {
-				return 'default';
-			}
-		}
-		return configName;
-	};
-
-	const mode = document.querySelector('.codeMirrorEditor')?.dataset.mode ?? 'PG';
-	const options = {
-		mode,
-		indentUnit: 4,
-		tabMode: 'spaces',
-		lineNumbers: true,
-		lineWrapping: true,
-		extraKeys: {
-			Tab: (cm) => cm.execCommand('insertSoftTab'),
-			'Shift-Ctrl-F': (cm) => cm.foldCode(cm.getCursor(), { scanUp: true }),
-			'Shift-Cmd-F': (cm) => cm.foldCode(cm.getCursor(), { scanUp: true }),
-			'Shift-Ctrl-A': (cm) => CodeMirror.commands.foldAll(cm),
-			'Shift-Cmd-A': (cm) => CodeMirror.commands.foldAll(cm),
-			'Shift-Ctrl-G': (cm) => CodeMirror.commands.unfoldAll(cm),
-			'Shift-Cmd-G': (cm) => CodeMirror.commands.unfoldAll(cm)
-		},
-		highlightSelectionMatches: { annotateScrollbar: true },
-		matchBrackets: true,
-		inputStyle: 'contenteditable',
-		spellcheck: localStorage.getItem('WW_PGEditor_spellcheck') === 'true',
-		gutters: ['CodeMirror-linenumbers', 'CodeMirror-foldgutter']
-	};
-
-	if (mode === 'PG') {
-		options.extraKeys['Ctrl-/'] = (cm) => cm.execCommand('toggleComment');
-		options.extraKeys['Cmd-/'] = (cm) => cm.execCommand('toggleComment');
-		options.foldGutter = { rangeFinder: new CodeMirror.fold.combine(CodeMirror.fold.PG) };
-		options.fold = 'PG';
-	} else {
-		options.foldGutter = true;
-	}
-
-	const cm = (webworkConfig.pgCodeMirror = CodeMirror.fromTextArea(
-		document.querySelector('.codeMirrorEditor'),
-		options
-	));
-	cm.setSize('100%', '550px');
-
-	// Refresh the CodeMirror instance anytime the containing div resizes so that if line wrapping changes,
-	// the mouse cursor will still go to the correct place when the user clicks on the CodeMirror window.
-	new ResizeObserver(() => cm.refresh()).observe(document.querySelector('.CodeMirror'));
-
-	const currentThemeFile = localStorage.getItem('WW_PGEditor_selected_theme') ?? 'default';
-	const currentThemeName = await loadConfig(currentThemeFile);
-	cm.setOption('theme', currentThemeName);
-
-	const currentKeymapFile = localStorage.getItem('WW_PGEditor_selected_keymap') ?? 'default';
-	const currentKeymapName = await loadConfig(currentKeymapFile);
-	cm.setOption('keyMap', currentKeymapName);
-
-	const selectTheme = document.getElementById('selectTheme');
-	selectTheme.value = currentThemeName === 'default' ? 'default' : currentThemeFile;
-	selectTheme.addEventListener('change', async () => {
-		const themeName = await loadConfig(selectTheme.value);
-		cm.setOption('theme', themeName);
-		localStorage.setItem('WW_PGEditor_selected_theme', themeName === 'default' ? 'default' : selectTheme.value);
-	});
-
-	const selectKeymap = document.getElementById('selectKeymap');
-	selectKeymap.value = currentKeymapName === 'default' ? 'default' : currentKeymapFile;
-	selectKeymap.addEventListener('change', async () => {
-		const keymapName = await loadConfig(selectKeymap.value);
-		cm.setOption('keyMap', keymapName);
-		localStorage.setItem('WW_PGEditor_selected_keymap', keymapName === 'default' ? 'default' : selectKeymap.value);
-	});
-
-	const enableSpell = document.getElementById('enableSpell');
-	enableSpell.checked = localStorage.getItem('WW_PGEditor_spellcheck') === 'true';
-	enableSpell.addEventListener('change', () => {
-		cm.setOption('spellcheck', enableSpell.checked);
-		localStorage.setItem('WW_PGEditor_spellcheck', enableSpell.checked);
-		cm.focus();
-	});
-
-	const forceRTL = document.getElementById('forceRTL');
-	forceRTL.addEventListener('change', () => {
-		cm.setOption('direction', forceRTL.checked ? 'rtl' : 'ltr');
-	});
+	editorInput?.form.addEventListener('submit', () => (editorInput.value = cm.source));
 })();
diff --git a/htdocs/js/PGCodeMirror/pgeditor.scss b/htdocs/js/PGCodeMirror/pgeditor.scss
index 1fd132c9fc..f37a1aabef 100644
--- a/htdocs/js/PGCodeMirror/pgeditor.scss
+++ b/htdocs/js/PGCodeMirror/pgeditor.scss
@@ -12,14 +12,33 @@
  * Artistic License for more details.
  */
 
-.CodeMirror {
+.code-mirror-editor {
 	border: 1px solid #ddd;
 	min-height: 400px;
+	overflow: auto;
 	resize: vertical;
+	height: 600px;
+
+	.cm-editor {
+		height: 100%;
+
+		.cm-scroller {
+			height: 100%;
+
+			.cm-content {
+				height: 100%;
+				min-height: 400px;
+			}
+		}
+
+		.cm-panels {
+			z-index: 18;
+		}
+	}
 }
 
-// This style is only used if the CodeMirror editor is disabled in localOverrides.conf.
-.codeMirrorEditor {
+// This style is used if the CodeMirror editor is disabled in localOverrides.conf.
+.text-area-editor {
 	border: 1px solid #ddd;
 	padding: 2px;
 	height: 550px;
@@ -27,38 +46,3 @@
 	width: 100%;
 	resize: vertical;
 }
-
-// Additional CSS for codemirror addons and overrides
-
-// CodeMirror overrides
-.CodeMirror-code {
-	outline: none;
-}
-
-pre.CodeMirror-line {
-	unicode-bidi: embed;
-}
-
-// Match Highligher CSS
-.CodeMirror-focused {
-	.cm-matchhighlight {
-		background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAFklEQVQI12NgYGBgkKzc8x9CMDAwAAAmhwSbidEoSQAAAABJRU5ErkJggg==);
-		background-position: bottom;
-		background-repeat: repeat-x;
-	}
-}
-
-.cm-matchhighlight {
-	background-color: lightgreen;
-}
-
-.CodeMirror-selection-highlight-scrollbar {
-	background-color: green;
-}
-
-// CSS to highlight trailing whitespace in PGML blocks
-.cm-trailingspace {
-	background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAACCAYAAAB/qH1jAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3QUXCToH00Y1UgAAACFJREFUCNdjPMDBUc/AwNDAAAFMTAwMDA0OP34wQgX/AQBYgwYEx4f9lQAAAABJRU5ErkJggg==);
-	background-position: bottom left;
-	background-repeat: repeat-x;
-}
diff --git a/htdocs/js/PGProblemEditor/pgproblemeditor.js b/htdocs/js/PGProblemEditor/pgproblemeditor.js
index f7e419d47b..a5ce979a5c 100644
--- a/htdocs/js/PGProblemEditor/pgproblemeditor.js
+++ b/htdocs/js/PGProblemEditor/pgproblemeditor.js
@@ -48,7 +48,7 @@
 		request_object.rpc_command = 'saveFile';
 		request_object.outputFilePath = document.getElementsByName('temp_file_path')[0]?.value ?? '';
 		request_object.fileContents =
-			webworkConfig?.pgCodeMirror?.getValue() ?? document.getElementById('problemContents')?.value ?? '';
+			webworkConfig?.pgCodeMirror?.source ?? document.getElementById('problemContents')?.value ?? '';
 
 		if (!request_object.outputFilePath) return;
 
@@ -119,7 +119,7 @@
 
 		request_object.rpc_command = 'tidyPGCode';
 		request_object.pgCode =
-			webworkConfig?.pgCodeMirror?.getValue() ?? document.getElementById('problemContents')?.value ?? '';
+			webworkConfig?.pgCodeMirror?.source ?? document.getElementById('problemContents')?.value ?? '';
 
 		fetch(webserviceURL, { method: 'post', mode: 'same-origin', body: new URLSearchParams(request_object) })
 			.then((response) => response.json())
@@ -141,7 +141,7 @@
 				if (request_object.pgCode === data.result_data.tidiedPGCode) {
 					showMessage('There were no changes to the code.', true);
 				} else {
-					if (webworkConfig?.pgCodeMirror) webworkConfig.pgCodeMirror.setValue(data.result_data.tidiedPGCode);
+					if (webworkConfig?.pgCodeMirror) webworkConfig.pgCodeMirror.source = data.result_data.tidiedPGCode;
 					else document.getElementById('problemContents').value = data.result_data.tidiedPGCode;
 					saveTempFile();
 					showMessage('Successfuly perltidied code.', true);
@@ -161,7 +161,7 @@
 
 		request_object.rpc_command = 'convertCodeToPGML';
 		request_object.pgCode =
-			webworkConfig?.pgCodeMirror?.getValue() ?? document.getElementById('problemContents')?.value ?? '';
+			webworkConfig?.pgCodeMirror?.source ?? document.getElementById('problemContents')?.value ?? '';
 
 		fetch(webserviceURL, { method: 'post', mode: 'same-origin', body: new URLSearchParams(request_object) })
 			.then((response) => response.json())
@@ -169,7 +169,7 @@
 				if (request_object.pgCode === data.result_data.pgmlCode) {
 					showMessage('There were no changes to the code.', true);
 				} else {
-					if (webworkConfig?.pgCodeMirror) webworkConfig.pgCodeMirror.setValue(data.result_data.pgmlCode);
+					if (webworkConfig?.pgCodeMirror) webworkConfig.pgCodeMirror.source = data.result_data.pgmlCode;
 					else document.getElementById('problemContents').value = data.result_data.pgmlCode;
 					saveTempFile();
 					showMessage('Successfully converted code to PGML', true);
@@ -252,9 +252,9 @@
 	const renderArea = document.getElementById('pgedit-render-area');
 	const fileType = document.getElementsByName('file_type')[0]?.value;
 
-	// This is either the div created by the CodeMirror editor or the problemContents textarea in the case that
+	// This is either the div containing the CodeMirror editor or the problemContents textarea in the case that
 	// CodeMirror is disabled in localOverrides.conf.
-	const editorArea = document.querySelector('.CodeMirror') ?? document.getElementById('problemContents');
+	const editorArea = document.querySelector('.code-mirror-editor') ?? document.getElementById('problemContents');
 
 	// Add hot key, ctrl-enter, to render the problem
 	editorArea.addEventListener('keydown', async (e) => {
@@ -279,8 +279,7 @@
 					if (window.getComputedStyle(renderArea).getPropertyValue('height') !== `${height}px`)
 						renderArea.style.height = `${height}px`;
 					if (window.getComputedStyle(editorArea).getPropertyValue('height') !== `${height}px`) {
-						if (webworkConfig?.pgCodeMirror) webworkConfig.pgCodeMirror.setSize('100%', `${height}px`);
-						else editorArea.style.height = `${height}px`;
+						editorArea.style.height = `${height}px`;
 					}
 				}
 			}
@@ -321,7 +320,7 @@
 				const requestData = new URLSearchParams(new FormData(problemForm));
 				requestData.set(
 					'rawProblemSource',
-					webworkConfig?.pgCodeMirror?.getValue() ?? document.getElementById('problemContents')?.value ?? ''
+					webworkConfig?.pgCodeMirror?.source ?? document.getElementById('problemContents')?.value ?? ''
 				);
 				requestData.set('send_pg_flags', 1);
 				requestData.set(button.name, button.value);
@@ -352,7 +351,7 @@
 			}
 
 			if (fileType === 'course_info') {
-				const contents = webworkConfig?.pgCodeMirror?.getValue();
+				const contents = webworkConfig?.pgCodeMirror?.source;
 				if (contents) renderArea.innerHTML = `<div class="overflow-auto p-2 bg-light h-100">${contents}</div>`;
 				else
 					renderArea.innerHTML =
@@ -370,7 +369,7 @@
 			}
 
 			if (fileType === 'hardcopy_theme') {
-				const contents = webworkConfig?.pgCodeMirror?.getValue();
+				const contents = webworkConfig?.pgCodeMirror?.source;
 				if (contents) {
 					renderArea.innerHTML = '<pre>' + contents.replace(/&/g, '&amp;').replace(/</g, '&lt;') + '</pre>';
 				} else
@@ -396,9 +395,7 @@
 					problemSeed: document.getElementById('action_view_seed_id')?.value ?? 1,
 					sourceFilePath: document.getElementsByName('edit_file_path')[0]?.value,
 					rawProblemSource:
-						webworkConfig?.pgCodeMirror?.getValue() ??
-						document.getElementById('problemContents')?.value ??
-						'',
+						webworkConfig?.pgCodeMirror?.source ?? document.getElementById('problemContents')?.value ?? '',
 					outputformat: 'simple',
 					showAnswerNumbers: 0,
 					// The set id is really only needed by set headers to get the correct dates for the set.
@@ -508,9 +505,7 @@
 					problemSeed: document.getElementById('action_hardcopy_seed_id')?.value ?? 1,
 					sourceFilePath: document.getElementsByName('edit_file_path')[0]?.value,
 					rawProblemSource:
-						webworkConfig?.pgCodeMirror?.getValue() ??
-						document.getElementById('problemContents')?.value ??
-						'',
+						webworkConfig?.pgCodeMirror?.source ?? document.getElementById('problemContents')?.value ?? '',
 					outputformat: document.getElementById('action_hardcopy_format_id')?.value ?? 'pdf',
 					hardcopy_theme: document.getElementById('action_hardcopy_theme_id')?.value ?? 'oneColumn',
 					// The set id is really only needed by set headers to get the correct dates for the set.
diff --git a/htdocs/js/System/system.scss b/htdocs/js/System/system.scss
index 6f60b1b4ab..18164250ce 100644
--- a/htdocs/js/System/system.scss
+++ b/htdocs/js/System/system.scss
@@ -809,7 +809,7 @@ input.changed[type='text'] {
 #pgedit-render-area {
 	border: 1px solid #ddd;
 	min-height: 400px;
-	height: 550px;
+	height: 600px;
 	resize: vertical;
 	display: flex;
 	flex-direction: column;
diff --git a/htdocs/package-lock.json b/htdocs/package-lock.json
index 3b186ab181..03ecf1b900 100644
--- a/htdocs/package-lock.json
+++ b/htdocs/package-lock.json
@@ -8,8 +8,8 @@
             "license": "GPL-2.0+",
             "dependencies": {
                 "@fortawesome/fontawesome-free": "^6.5.2",
+                "@openwebwork/pg-codemirror-editor": "^0.0.1-beta.5",
                 "bootstrap": "~5.3.3",
-                "codemirror": "^5.65.15",
                 "flatpickr": "^4.6.13",
                 "iframe-resizer": "^4.3.11",
                 "jquery": "^3.7.1",
@@ -31,6 +31,203 @@
                 "yargs": "^17.7.2"
             }
         },
+        "../../../../home/rice/Projects/Javascript/CodeMirror/pg-codemirror-editor": {
+            "name": "@openwebwork/pg-codemirror-editor",
+            "version": "0.0.1-beta.1",
+            "extraneous": true,
+            "license": "MIT",
+            "dependencies": {
+                "@codemirror/lang-html": "^6.4.9",
+                "@codemirror/lang-xml": "^6.1.0",
+                "@codemirror/theme-one-dark": "^6.1.2",
+                "@openwebwork/codemirror-lang-pg": "^0.0.1-beta.2",
+                "@replit/codemirror-emacs": "^6.1.0",
+                "@replit/codemirror-vim": "^6.2.1",
+                "cm6-theme-basic-dark": "^0.2.0",
+                "cm6-theme-basic-light": "^0.2.0",
+                "cm6-theme-gruvbox-dark": "^0.2.0",
+                "cm6-theme-gruvbox-light": "^0.2.0",
+                "cm6-theme-material-dark": "^0.2.0",
+                "cm6-theme-nord": "^0.2.0",
+                "cm6-theme-solarized-dark": "^0.2.0",
+                "cm6-theme-solarized-light": "^0.2.0",
+                "codemirror": "^6.0.1",
+                "codemirror-lang-perl": "^0.1.3",
+                "thememirror": "^2.0.1"
+            },
+            "devDependencies": {
+                "@awmottaz/prettier-plugin-void-html": "^1.6.1",
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@@ -108,6 +409,32 @@
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@@ -356,10 +683,127 @@
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             "resolved": "https://registry.npmjs.org/@trysound/sax/-/sax-0.2.0.tgz",
@@ -1888,10 +2604,77 @@
                 "wrap-ansi": "^7.0.0"
             }
         },
+        "cm6-theme-basic-dark": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-basic-dark/-/cm6-theme-basic-dark-0.2.0.tgz",
+            "integrity": "sha512-+mNNJecRtxS/KkloMDCQF0oTrT6aFGRZTjnBcdT5UG1pcDO4Brq8l1+0KR/8dZ7hub2gOGOzoi3rGFD8GzlH7Q==",
+            "requires": {}
+        },
+        "cm6-theme-basic-light": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-basic-light/-/cm6-theme-basic-light-0.2.0.tgz",
+            "integrity": "sha512-1prg2gv44sYfpHscP26uLT/ePrh0mlmVwMSoSd3zYKQ92Ab3jPRLzyCnpyOCQLJbK+YdNs4HvMRqMNYdy4pMhA==",
+            "requires": {}
+        },
+        "cm6-theme-gruvbox-dark": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-gruvbox-dark/-/cm6-theme-gruvbox-dark-0.2.0.tgz",
+            "integrity": "sha512-xyqsG19qV+nb7ZHTMocSNWwZHMExfQxDm0FlbNMqEGKeQR96WryssXJH/IZZQudwrPpWU2dCoyOgMFhti2UTYA==",
+            "requires": {}
+        },
+        "cm6-theme-gruvbox-light": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-gruvbox-light/-/cm6-theme-gruvbox-light-0.2.0.tgz",
+            "integrity": "sha512-sc4dEMLU5y4F3QGLjwMQs1H3Q0a0ooXA1EvyWnknxLEGQVXwJrxkkV67gs1TqWASl2i63iomt4zyz5pkbfO1yg==",
+            "requires": {}
+        },
+        "cm6-theme-material-dark": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-material-dark/-/cm6-theme-material-dark-0.2.0.tgz",
+            "integrity": "sha512-H09JZihzg4w0mTtOqo5bQdxItkQWw+ergKlk7BSfwYjaR2nOi+wIN0R+ByAo7bON8GbFODvjTxH3EIqdhovFeA==",
+            "requires": {}
+        },
+        "cm6-theme-nord": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-nord/-/cm6-theme-nord-0.2.0.tgz",
+            "integrity": "sha512-jTh+5nvl+N/5CtTK7UVcrxDCj2AOStvbNM8uP6tx6amq4QaaLDlapjMw+MNzEkvxcPnHY+YM91tbklS2KNlR2w==",
+            "requires": {}
+        },
+        "cm6-theme-solarized-dark": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-solarized-dark/-/cm6-theme-solarized-dark-0.2.0.tgz",
+            "integrity": "sha512-FWtYHcX8NLzNSs21yGbkLF+q/5m2u80ug0JytKoI9nMZWPP5dcnsFYp1iZBEegLehiZnpv1qcmTsLTUG2KD39w==",
+            "requires": {}
+        },
+        "cm6-theme-solarized-light": {
+            "version": "0.2.0",
+            "resolved": "https://registry.npmjs.org/cm6-theme-solarized-light/-/cm6-theme-solarized-light-0.2.0.tgz",
+            "integrity": "sha512-Iw7Xv+9A6NlT7sRGlM2pOwD3ZBETkAqpb7c6O0LPj5kjwcK6C3k+mvjzaQt1gzfBErMmhL1HHuK07zICeXkE+w==",
+            "requires": {}
+        },
         "codemirror": {
-            "version": "5.65.16",
-            "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.65.16.tgz",
-            "integrity": "sha512-br21LjYmSlVL0vFCPWPfhzUCT34FM/pAdK7rRIZwa0rrtrIdotvP4Oh4GUHsu2E3IrQMCfRkL/fN3ytMNxVQvg=="
+            "version": "6.0.1",
+            "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-6.0.1.tgz",
+            "integrity": "sha512-J8j+nZ+CdWmIeFIGXEFbFPtpiYacFMDR8GlHK3IyHQJMCaVRfGx9NT+Hxivv1ckLWPvNdZqndbr/7lVhrf/Svg==",
+            "requires": {
+                "@codemirror/autocomplete": "^6.0.0",
+                "@codemirror/commands": "^6.0.0",
+                "@codemirror/language": "^6.0.0",
+                "@codemirror/lint": "^6.0.0",
+                "@codemirror/search": "^6.0.0",
+                "@codemirror/state": "^6.0.0",
+                "@codemirror/view": "^6.0.0"
+            }
+        },
+        "codemirror-lang-perl": {
+            "version": "0.1.5-beta.1",
+            "resolved": "https://registry.npmjs.org/codemirror-lang-perl/-/codemirror-lang-perl-0.1.5-beta.1.tgz",
+            "integrity": "sha512-iAp+G5UHpoQwrtCs1kD5yKuZ/tYYh812aI66FDoJYnOESysr/BlTaoTsgH9u3fskEcA6SRYmB3UqpkxiFH5fvw==",
+            "requires": {
+                "@codemirror/language": "^6.10.2",
+                "@lezer/highlight": "^1.2.1",
+                "@lezer/lr": "^1.4.2"
+            }
         },
         "color-convert": {
             "version": "2.0.1",
@@ -1920,6 +2703,11 @@
             "integrity": "sha512-QrWXB+ZQSVPmIWIhtEO9H+gwHaMGYiF5ChvoJ+K9ZGHG/sVsa6yiesAD1GC/x46sET00Xlwo1u49RVVVzvcSkw==",
             "dev": true
         },
+        "crelt": {
+            "version": "1.0.6",
+            "resolved": "https://registry.npmjs.org/crelt/-/crelt-1.0.6.tgz",
+            "integrity": "sha512-VQ2MBenTq1fWZUH9DJNGti7kKv6EeAuYr3cLwxUWhIu1baTaXh4Ib5W2CqHVqib4/MqbYGJqiL3Zb8GJZr3l4g=="
+        },
         "css-declaration-sorter": {
             "version": "7.2.0",
             "resolved": "https://registry.npmjs.org/css-declaration-sorter/-/css-declaration-sorter-7.2.0.tgz",
@@ -2665,6 +3453,11 @@
             "integrity": "sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==",
             "dev": true
         },
+        "style-mod": {
+            "version": "4.1.2",
+            "resolved": "https://registry.npmjs.org/style-mod/-/style-mod-4.1.2.tgz",
+            "integrity": "sha512-wnD1HyVqpJUI2+eKZ+eo1UwghftP6yuFheBqqe+bWCotBjC2K1YnteJILRMs3SM4V/0dLEW1SC27MWP5y+mwmw=="
+        },
         "stylehacks": {
             "version": "6.1.1",
             "resolved": "https://registry.npmjs.org/stylehacks/-/stylehacks-6.1.1.tgz",
@@ -2710,6 +3503,12 @@
                 }
             }
         },
+        "thememirror": {
+            "version": "2.0.1",
+            "resolved": "https://registry.npmjs.org/thememirror/-/thememirror-2.0.1.tgz",
+            "integrity": "sha512-d5i6FVvWWPkwrm4cHLI3t9AT1OrkAt7Ig8dtdYSofgF7C/eiyNuq6zQzSTusWTde3jpW9WLvA9J/fzNKMUsd0w==",
+            "requires": {}
+        },
         "to-regex-range": {
             "version": "5.0.1",
             "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -2735,6 +3534,11 @@
             "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
             "dev": true
         },
+        "w3c-keyname": {
+            "version": "2.2.8",
+            "resolved": "https://registry.npmjs.org/w3c-keyname/-/w3c-keyname-2.2.8.tgz",
+            "integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ=="
+        },
         "wrap-ansi": {
             "version": "7.0.0",
             "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
diff --git a/htdocs/package.json b/htdocs/package.json
index ddbb13e751..78431bef08 100644
--- a/htdocs/package.json
+++ b/htdocs/package.json
@@ -14,8 +14,8 @@
     },
     "dependencies": {
         "@fortawesome/fontawesome-free": "^6.5.2",
+        "@openwebwork/pg-codemirror-editor": "^0.0.1-beta.5",
         "bootstrap": "~5.3.3",
-        "codemirror": "^5.65.15",
         "flatpickr": "^4.6.13",
         "iframe-resizer": "^4.3.11",
         "jquery": "^3.7.1",
diff --git a/lib/WeBWorK/HTML/CodeMirrorEditor.pm b/lib/WeBWorK/HTML/CodeMirrorEditor.pm
index 21bb0f60b9..d38800970d 100644
--- a/lib/WeBWorK/HTML/CodeMirrorEditor.pm
+++ b/lib/WeBWorK/HTML/CodeMirrorEditor.pm
@@ -24,80 +24,33 @@ PGProblemEditor.pm modules.
 
 =cut
 
-use WeBWorK::Utils qw(getAssetURL);
-
-our @EXPORT_OK = qw(generate_codemirror_html generate_codemirror_controls_html output_codemirror_static_files);
-
-# Available CodeMirror themes
-use constant CODEMIRROR_THEMES => [
-	'3024-day',                '3024-night',         'abbott',        'abcdef',
-	'ambiance',                'ambiance-mobile',    'ayu-dark',      'ayu-mirage',
-	'base16-dark',             'base16-light',       'bespin',        'blackboard',
-	'cobalt',                  'colorforth',         'darcula',       'dracula',
-	'duotone-dark',            'duotone-light',      'eclipse',       'elegant',
-	'erlang-dark',             'gruvbox-dark',       'hopscotch',     'icecoder',
-	'idea',                    'isotope',            'juejin',        'lesser-dark',
-	'liquibyte',               'lucario',            'material',      'material-darker',
-	'material-ocean',          'material-palenight', 'mbo',           'mdn-like',
-	'midnight',                'monokai',            'moxer',         'neat',
-	'neo',                     'night',              'nord',          'oceanic-next',
-	'panda-syntax',            'paraiso-dark',       'paraiso-light', 'pastel-on-dark',
-	'railscasts',              'rubyblue',           'seti',          'shadowfox',
-	'solarized',               'ssms',               'the-matrix',    'tomorrow-night-bright',
-	'tomorrow-night-eighties', 'ttcn',               'twilight',      'vibrant-ink',
-	'xq-dark',                 'xq-light',           'yeti',          'yonce',
-	'zenburn'
-];
-
-# Available CodeMirror keymaps
-use constant CODEMIRROR_KEYMAPS => [ 'emacs', 'sublime', 'vim' ];
-
-# Javascript for addons used by the PG editor (relative to the node_modules/codemirror/addon directory).
-use constant CODEMIRROR_ADDONS_CSS => [ 'dialog/dialog.css', 'search/matchesonscrollbar.css', 'fold/foldgutter.css' ];
-
-# Javascript for addons used by the PG editor (relative to the node_modules/codemirror/addon directory).
-use constant CODEMIRROR_ADDONS_JS => [
-	'dialog/dialog.js',            'search/search.js',
-	'search/searchcursor.js',      'search/matchesonscrollbar.js',
-	'search/match-highlighter.js', 'search/match-highlighter.js',
-	'scroll/annotatescrollbar.js', 'edit/matchbrackets.js',
-	'fold/foldcode.js',            'fold/foldgutter.js',
-	'fold/xml-fold.js'
-];
-
-sub generate_codemirror_html ($c, $name, $contents = '', $mode = 'PG') {
-	# Output the textarea that will be used by CodeMirror.
-	# If CodeMirror is disabled, then this is directly the editing area.
-	return $c->text_area($name => $contents, id => $name, class => 'codeMirrorEditor', data => { mode => $mode });
-}
-
-sub generate_codemirror_controls_html ($c) {
-	my $ce = $c->ce;
-
-	return '' unless $ce->{options}{PGCodeMirror};
-
-	# Construct the labels and values for the theme menu.
-	my $themeValues = [ [ default => 'default', selected => 'selected' ] ];
-	for (@{ CODEMIRROR_THEMES() }) {
-		push @$themeValues, [ $_ => getAssetURL($ce, "node_modules/codemirror/theme/$_.css") ];
+our @EXPORT_OK = qw(generate_codemirror_html output_codemirror_static_files);
+
+sub generate_codemirror_html ($c, $name, $contents = '', $language = 'pg') {
+	if ($c->ce->{options}{PGCodeMirror}) {
+		# Output the div that will be used by CodeMirror and a hidden input containing the contents.
+		return $c->c(
+			$c->hidden_field($name => $contents),
+			$c->tag(
+				'div',
+				id    => $name,
+				class => 'code-mirror-editor tex2jax_ignore',
+				data  => { language => $language }
+			)
+		)->join('');
+	} else {
+		# If CodeMirror is disabled, then a text area is used instead.
+		return $c->text_area(
+			$name => $contents,
+			id    => $name,
+			class => 'text-area-editor',
+			data  => { language => $language }
+		);
 	}
-
-	# Construct the labels and values for the keymap menu.
-	my $keymapValues = [ [ default => 'default', selected => 'selected' ] ];
-	for (@{ CODEMIRROR_KEYMAPS() }) {
-		push @$keymapValues, [ $_ => getAssetURL($ce, "node_modules/codemirror/keymap/$_.js") ];
-	}
-
-	return $c->include('HTML/CodeMirrorEditor/controls', themeValues => $themeValues, keymapValues => $keymapValues);
 }
 
-sub output_codemirror_static_files ($c, $mode = 'PG') {
-	return $c->include(
-		'HTML/CodeMirrorEditor/js',
-		codemirrorAddonsCSS => CODEMIRROR_ADDONS_CSS(),
-		codemirrorAddonsJS  => CODEMIRROR_ADDONS_JS(),
-		codemirrorModesJS   => $mode eq 'htmlmixed' ? [ 'xml', 'css', 'javascript', 'htmlmixed' ] : [$mode]
-	);
+sub output_codemirror_static_files ($c) {
+	return $c->include('HTML/CodeMirrorEditor/js');
 }
 
 1;
diff --git a/templates/ContentGenerator/Instructor/AchievementEditor.html.ep b/templates/ContentGenerator/Instructor/AchievementEditor.html.ep
index 28c4097172..b593704ec0 100644
--- a/templates/ContentGenerator/Instructor/AchievementEditor.html.ep
+++ b/templates/ContentGenerator/Instructor/AchievementEditor.html.ep
@@ -1,9 +1,8 @@
 % use WeBWorK::Utils qw(not_blank getAssetURL);
-% use WeBWorK::HTML::CodeMirrorEditor
-	% qw(generate_codemirror_html generate_codemirror_controls_html output_codemirror_static_files);
+% use WeBWorK::HTML::CodeMirrorEditor qw(generate_codemirror_html output_codemirror_static_files);
 %
 % content_for js => begin
-	<%= output_codemirror_static_files($c, 'perl') =%>
+	<%= output_codemirror_static_files($c) =%>
 	<%= javascript getAssetURL($ce, 'js/ActionTabs/actiontabs.js'), defer => undef =%>
 % end
 %
@@ -24,7 +23,6 @@
 	% }
 	%
 	<div class="mb-2"><%= generate_codemirror_html($c, 'achievementContents', $achievementContents, 'perl') =%></div>
-	<%= generate_codemirror_controls_html($c) =%>
 	%
 	% # Output action forms
 	% my $default_choice;
diff --git a/templates/ContentGenerator/Instructor/AchievementNotificationEditor.html.ep b/templates/ContentGenerator/Instructor/AchievementNotificationEditor.html.ep
index 01e5697a11..4a26f76c8f 100644
--- a/templates/ContentGenerator/Instructor/AchievementNotificationEditor.html.ep
+++ b/templates/ContentGenerator/Instructor/AchievementNotificationEditor.html.ep
@@ -1,9 +1,8 @@
 % use WeBWorK::Utils qw(not_blank getAssetURL);
-% use WeBWorK::HTML::CodeMirrorEditor
-	% qw(generate_codemirror_html generate_codemirror_controls_html output_codemirror_static_files);
+% use WeBWorK::HTML::CodeMirrorEditor qw(generate_codemirror_html output_codemirror_static_files);
 %
 % content_for js => begin
-	<%= output_codemirror_static_files($c, 'perl') =%>
+	<%= output_codemirror_static_files($c) =%>
 	<%= javascript getAssetURL($ce, 'js/ActionTabs/actiontabs.js'), defer => undef =%>
 % end
 %
@@ -24,8 +23,8 @@
 	% }
 	%
 	<div class="mb-2">
+	% # FIXME: This should not be using perl. Mojolicious templates have embedded perl, but are not perl.
     <%= generate_codemirror_html($c, 'achievementNotification', $achievementNotification, 'perl') =%></div>
-	<%= generate_codemirror_controls_html($c) =%>
 	%
 	% # Output action forms
 	% my $default_choice;
diff --git a/templates/ContentGenerator/Instructor/PGProblemEditor.html.ep b/templates/ContentGenerator/Instructor/PGProblemEditor.html.ep
index 6c11e49345..bc85653afa 100644
--- a/templates/ContentGenerator/Instructor/PGProblemEditor.html.ep
+++ b/templates/ContentGenerator/Instructor/PGProblemEditor.html.ep
@@ -4,16 +4,10 @@
 % use WeBWorK::Utils qw(not_blank x getAssetURL);
 % use WeBWorK::Utils::Files qw(readFile);
 % use WeBWorK::Utils::Sets qw(format_set_name_display);
-% use WeBWorK::HTML::CodeMirrorEditor
-	% qw(generate_codemirror_html generate_codemirror_controls_html output_codemirror_static_files);
+% use WeBWorK::HTML::CodeMirrorEditor qw(generate_codemirror_html output_codemirror_static_files);
 %
-% my $codemirrorMode = 'PG';
-% if ($c->{file_type}) {
-%	$codemirrorMode = 'htmlmixed' if ($c->{file_type} eq 'course_info');
-%	$codemirrorMode = 'xml'       if ($c->{file_type} eq 'hardcopy_theme');
-% }
 % content_for js => begin
-	<%= output_codemirror_static_files($c, $codemirrorMode) =%>
+	<%= output_codemirror_static_files($c) =%>
 	<%= javascript getAssetURL($ce, 'js/ActionTabs/actiontabs.js'),           defer => undef =%>
 	<%= javascript getAssetURL($ce, 'js/PGProblemEditor/pgproblemeditor.js'), defer => undef =%>
 % end
@@ -156,7 +150,12 @@
 	% }
 	<div class="row mb-2">
 		<div class="col-lg-6 col-md-12 order-last order-lg-first">
-			<%= generate_codemirror_html($c, 'problemContents', $problemContents, $codemirrorMode) =%>
+			<%= generate_codemirror_html(
+				$c,
+				'problemContents',
+				$problemContents,
+				{ course_info => 'html', hardcopy_theme => 'xml' }->{ $c->{file_type} } // 'pg'
+			) =%>
 		</div>
 		<div class="col-lg-6 col-md-12 mb-lg-0 mb-2 order-first order-lg-last">
 			<div class="p-0" id="pgedit-render-area">
@@ -168,7 +167,6 @@
 			</div>
 		</div>
 	</div>
-	<%= generate_codemirror_controls_html($c) =%>
 	<%= $fileInfo->() %>
 	%
 	% # Output action forms
diff --git a/templates/HTML/CodeMirrorEditor/controls.html.ep b/templates/HTML/CodeMirrorEditor/controls.html.ep
deleted file mode 100644
index c91a9996fc..0000000000
--- a/templates/HTML/CodeMirrorEditor/controls.html.ep
+++ /dev/null
@@ -1,33 +0,0 @@
-% # Output the html elements for setting the CodeMirror options.
-<div class="row align-items-center">
-	<div class="col-sm-auto mb-2">
-		<div class="row align-items-center">
-			<%= label_for selectTheme => maketext('Theme:'), class => 'col-form-label col-auto' =%>
-			<div class="col-auto">
-				<%= select_field selectTheme => $themeValues,
-					id => 'selectTheme', class => 'form-select form-select-sm d-inline w-auto' =%>
-			</div>
-		</div>
-	</div>
-	<div class="col-sm-auto mb-2">
-		<div class="row align-items-center">
-			<%= label_for selectKeymap => maketext('Key Map:'), class => 'col-form-label col-auto' =%>
-			<div class="col-auto">
-				<%= select_field selectKeymap => $keymapValues,
-					id => 'selectKeymap', class => 'form-select form-select-sm d-inline w-auto' =%>
-			</div>
-		</div>
-	</div>
-	<div class="col-sm-auto mb-2">
-		<div class="form-check mb-0">
-			<%= check_box 'enableSpell', id => 'enableSpell', class => 'form-check-input' =%>
-			<%= label_for enableSpell => maketext('Enable Spell Checking'), class => 'form-check-label' =%>
-		</div>
-	</div>
-	<div class="col-sm-auto mb-2">
-		<div class="form-check mb-0">
-			<%= check_box 'forceRTL', id => 'forceRTL', class => 'form-check-input' =%>
-			<%= label_for forceRTL => maketext('Force editor to RTL'), class => 'form-check-label' =%>
-		</div>
-	</div>
-</div>
diff --git a/templates/HTML/CodeMirrorEditor/js.html.ep b/templates/HTML/CodeMirrorEditor/js.html.ep
index 33a4be141f..3d6edad16b 100644
--- a/templates/HTML/CodeMirrorEditor/js.html.ep
+++ b/templates/HTML/CodeMirrorEditor/js.html.ep
@@ -1,34 +1,17 @@
 % use WeBWorK::Utils qw(getAssetURL);
 %
+% # The textarea styles in this file are still needed if CodeMirror is disabled.
+% content_for css => begin
+	<%= stylesheet getAssetURL($ce, 'js/PGCodeMirror/pgeditor.css') =%>
+% end
+
 % if ($ce->{options}{PGCodeMirror}) {
-	% content_for css => begin
-		<%= stylesheet getAssetURL($ce, 'node_modules/codemirror/lib/codemirror.css') =%>
-		%
-		% for my $addon (@$codemirrorAddonsCSS) {
-			<%= stylesheet getAssetURL($ce, "node_modules/codemirror/addon/$addon") =%>
-		% }
-		<%= stylesheet getAssetURL($ce, 'js/PGCodeMirror/pgeditor.css') =%>
-	% end
-	%
 	% content_for js => begin
-		<%= javascript getAssetURL($ce, 'node_modules/codemirror/lib/codemirror.js'), defer => undef =%>
-		%
-		% for my $addon (@$codemirrorAddonsJS) {
-			<%= javascript getAssetURL($ce, "node_modules/codemirror/addon/$addon"), defer => undef =%>
-		% }
-		% for my $mode (@$codemirrorModesJS) {
-			<%= javascript getAssetURL(
-					$ce,
-					$mode eq 'PG' ? 'js/PGCodeMirror/PG.js' : "node_modules/codemirror/mode/$mode/$mode.js"
-				), defer => undef =%>
-		% }
-		%
+		<%= javascript getAssetURL(
+				$ce,
+				'node_modules/@openwebwork/pg-codemirror-editor/dist/pg-codemirror-editor.js'
+			),
+			defer => undef =%>
 		<%= javascript getAssetURL($ce, 'js/PGCodeMirror/pgeditor.js'), defer => undef =%>
-		<%= javascript getAssetURL($ce, 'js/PGCodeMirror/comment.js'), defer => undef =%>
 	% end
 % }
-%
-% # The textarea styles in this file are still needed if CodeMirror is disabled.
-% content_for css => begin
-	<%= stylesheet getAssetURL($ce, 'js/PGCodeMirror/pgeditor.css') =%>
-% end
diff --git a/templates/HelpFiles/InstructorPGProblemEditor.html.ep b/templates/HelpFiles/InstructorPGProblemEditor.html.ep
index c28751e7ee..a57c23dd2f 100644
--- a/templates/HelpFiles/InstructorPGProblemEditor.html.ep
+++ b/templates/HelpFiles/InstructorPGProblemEditor.html.ep
@@ -72,13 +72,55 @@
 			<dd><%= maketext('This links to problem authoring information on the WeBWorK wiki.') %></dd>
 		</dl>
 	</dd>
-	<dt><%= maketext('The large text window') %></dt>
+	<dt><%= maketext('Text Editor Window') %></dt>
 	<dd class="list-group-item">
-		<%= maketext('This is where you edit the text of the problem template. Type Ctrl-Enter while this '
-			. 'window has focus to re-render the problem. Code folding is enabled either by clicking on '
-			. 'the triangles in the gutter next to line numbers or using the shortcut Shift-Ctrl-F.  Folding '
-			. 'all regions can be accomplished with Shift-Ctrl-A and unfold all regions with Shift-Ctrl-G. '
-			. 'Comments can be toggled with Ctrl-/.') =%>
+		<%= maketext('This is where you edit the code of the problem. Type Ctrl-Enter while this window '
+			. 'has focus to re-render the problem. In addition, the following keyboard shortcuts are available.') =%>
+		<table class="table table-bordered table-sm align-middle w-auto mb-0 mx-auto">
+			<thead>
+				<tr>
+					<th class="text-nowrap"><%= maketext('Key Binding') %></th>
+					<th class="text-nowrap"><%= maketext('Mac alternate') %></th>
+					<th><%= maketext('Action') %></th>
+				</tr>
+			</thead>
+			<tbody class="table-group-divider">
+				<tr>
+					<td>Ctrl-m</td>
+					<td>Alt-Shift-m</td>
+					<td>
+						<%= maketext('Enable or disable tab-focus mode. When tab-focus mode is off, pressing Tab '
+							. 'inside the editor window indents the current line. When tab-focus mode is on '
+							. 'Tab and Shift-Tab move focus out of the editor window.') %>
+					</td>
+				<tr>
+					<td>Ctrl-Shift-[</td>
+					<td>Cmd-Shift-[</td>
+					<td>
+						<%= maketext('Fold the region that begins on the current line. Triangles in the gutter '
+						. 'next to line numbers indicate which regions can be folded.') %>
+					</td>
+				</tr>
+				<tr>
+					<td>Ctrl-Shift-]</td>
+					<td>Cmd-Shift-]</td>
+					<td><%= maketext('Unfold the region that begins on the current line.') %></td>
+				</tr>
+				<tr><td>Ctrl-Alt-[</td><td>Cmd-Alt-[</td><td><%= maketext('Fold all regions.') %></td></tr>
+				<tr><td>Cmd-Alt-]</td><td>Cmd-Alt-]</td><td><%= maketext('Unfold all regions.') %></td></tr>
+				<tr><td>Ctrl-/</td><td>Cmd-/</td><td><%= maketext('Toggle comment.') %></td></tr>
+				<tr>
+					<td>Shift-Alt-a</td>
+					<td></td>
+					<td><%= maketext('Toggle block comment. (Only has effect inside PGML blocks.)') %></td>
+				</tr>
+				<tr>
+					<td>Ctrl-Space</td>
+					<td>Alt-`</td>
+					<td><%= maketext('Show available autocompletions at the current cursor location.') %></td>
+				</tr>
+			</tbody>
+		</table>
 	</dd>
 	<dt><%= maketext('Text Editor Options') %></dt>
 	<dd class="list-group-item">
@@ -89,14 +131,19 @@
 			<dd>
 				<%= maketext('The key maps that are available are "default", "emacs", "sublime", and "vim". The '
 					. '"default" key map has the standard behavior of a browser text area. You can use Ctrl-C to copy, '
-					. 'Ctrl-V to paste, Ctrl-F to search, etc. If you are more comfortable with the "emacs", '
-					. '"sublime", or "vim" text editors then you may choose to use one of those key maps instead.') =%>
+					. 'Ctrl-V to paste, Ctrl-F to search, etc. If you are more comfortable with the "emacs" '
+					. ' or "vim" text editors then you may choose to use one of those key maps instead.') =%>
 			</dd>
 			<dt><%= maketext('Enable Spell Checking') %></dt>
 			<dd>
 				<%= maketext('Spell check the text of the file that your are editing. Note that there will be many '
 					. 'spelling errors in the code parts of your file.') =%>
 			</dd>
+			<dt><%= maketext('Force RTL') %></dt>
+			<dd>
+				<%= maketext('Force the editor to display text from right-to-left. '
+					. '(Note that this does not persist when reloading the page.)') =%>
+			</dd>
 		</dl>
 	</dd>
 </dl>