Today I Learned

A collection of useful things I've learned. Inspired by simonw/til.

See the full website at til.jakelazaroff.com.

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65 TILs so far:

1password

• Use specific SSH keys

astro

• Generate a static SVG sprite sheet

bash

• Control terminal appearance with tput
• Run commands when a shell script exits

blender

• Export a Blender file to GLB from the command line

c

• Prevent ClangFormat from breaking before curly braces

caddy

• Run a local static file server over HTTPS
• Serve Markdown files as HTML

css

• Anchor scroll position to the bottom
• Dynamically change styles from HTML or JSX
• Make a CSS variable color translucent
• Set default styles for tags
• Swap between black and white text based on background color
• Use CSS variables in a <dialog> backdrop
• Use grid-template to set grid columns, rows and areas

django

• Conditionally extend a template

docker

• Add root certificates to a Debian container
• Fix "At least one invalid signature was encountered"

entr

• Reload a webpage when a file changes
• Rerun a command when files change

esbuild

• Run a development server with live reload

git

• Ignore all .DS_Store files
• List all files tracked by git
• Run a command if there are unstaged changes
• Update all submodules to latest commit on origin

github

• Run GitHub Actions locally
• Trigger a workflow run in another repo
• Write an inline script in a GitHub Actions workflow

gltf

• Extract data from a mesh primitive

htmx

• Attach attributes to dynamically added elements
• Load modal content when a Shoelace dialog opens

javascript

• Access CSS variables from JavaScript
• Load a user-created JavaScript file in the browser
• Programmatically create SVG elements

logic

• Send stereo output through specific output channels

make

• Build all files with a given extension
• List all commands in a Makefile

math

• Check whether an angle is between two other angles
• Convert between 3D coordinate systems
• Find a point on a sphere
• Rotate a point around a circle

nextjs

• Don't server-side render a client component

nodejs

• Execute TypeScript files in Node.js
• Get __dirname in ESM

pnpm

• Patch a node_modules dependency

poetry

• Create .venv folders within projects

prosemirror

• Prevent extra whitespace in NodeViews
• Use a Svelte component as a NodeView

redbean

• Bundle files into a redbean zip archive

rsbuild

• Migrate from Create React App

rust

• Link against a C++ file

svelte

• Bail out of a reactive block
• Force reactive state to reevaluate

svg

• Create an SVG sprite sheet

systemd

• Set up a basic service

tailwind

• Style conditionally based on data and ARIA attributes
• Style shadow trees from the light DOM

threejs

• Display an object's bounding box
• Pick objects with the mouse cursor
• Set default camera in React Three Fiber

typescript

• Assert that a variable is not null or undefined
• tsconfig flags to prevent common errors
• Type concrete subclasses of an abstract class
• Types and variables can share names

volta

• Install Volta with Homebrew