Add js-compress

pavelb · Nov 23, 2023 · f84fb0b · f84fb0b
1 parent 585837b
commit f84fb0b
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diff --git a/.DS_Store b/.DS_Store
diff --git a/js-compress.html b/js-compress.html
@@ -0,0 +1,21 @@
+<html>
+  <head>
+    <style>
+      html * {
+        font-family: monospace;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>JS Compress</h1>
+    <p>Compresses Javascript code written using only ascii characters by storing two 8-bit characters in one 16-bit character via a<<8|b</p>
+    <textarea id="input" rows="6" cols="64" placeholder="Input"></textarea>
+    <textarea id="output" rows="6" cols="64" placeholder="Output"></textarea>
+    <script>
+      const twiceTheDeal = s => s.replace(/../g, c=>String.fromCharCode(c.charCodeAt(0) << 8 | c.charCodeAt(1)));
+      input.addEventListener('input', _ => {
+        output.value = "eval(unescape(escape`" + twiceTheDeal(input.value) + "`.replace(/u(..)(..)/g,'u00$1%u00$2')))";
+      });
+    </script>
+  </body>
+</html>