Sourced from esbuild's releases.

v0.19.6

• Fix a constant folding bug with bigint equality

  This release fixes a bug where esbuild incorrectly checked for bigint equality by checking the equality of the bigint literal text. This is correct if the bigint doesn't have a radix because bigint literals without a radix are always in canonical form (since leading zeros are not allowed). However, this is incorrect if the bigint has a radix (e.g. 0x123n) because the canonical form is not enforced when a radix is present.

  // Original code
  console.log(!!0n, !!1n, 123n === 123n)
  console.log(!!0x0n, !!0x1n, 123n === 0x7Bn)
  // Old output
  console.log(false, true, true);
  console.log(true, true, false);
  // New output
  console.log(false, true, true);
  console.log(!!0x0n, !!0x1n, 123n === 0x7Bn);

• Add some improvements to the JavaScript minifier

  This release adds more cases to the JavaScript minifier, including support for inlining String.fromCharCode and String.prototype.charCodeAt when possible:

  // Original code
  document.onkeydown = e => e.keyCode === 'A'.charCodeAt(0) && console.log(String.fromCharCode(55358, 56768))
  // Old output (with --minify)
  document.onkeydown=o=>o.keyCode==="A".charCodeAt(0)&&console.log(String.fromCharCode(55358,56768));
  // New output (with --minify)
  document.onkeydown=o=>o.keyCode===65&&console.log("🧀");

  In addition, immediately-invoked function expressions (IIFEs) that return a single expression are now inlined when minifying. This makes it possible to use IIFEs in combination with @__PURE__ annotations to annotate arbitrary expressions as side-effect free without the IIFE wrapper impacting code size. For example:

  // Original code
  const sideEffectFreeOffset = /* @__PURE__ */ (() => computeSomething())()
  use(sideEffectFreeOffset)
  // Old output (with --minify)
  const e=(()=>computeSomething())();use(e);
  // New output (with --minify)
  const e=computeSomething();use(e);

• Automatically prefix the mask-composite CSS property for WebKit (#3493)

... (truncated)

Sourced from esbuild's changelog.

0.19.6

• Fix a constant folding bug with bigint equality

  This release fixes a bug where esbuild incorrectly checked for bigint equality by checking the equality of the bigint literal text. This is correct if the bigint doesn't have a radix because bigint literals without a radix are always in canonical form (since leading zeros are not allowed). However, this is incorrect if the bigint has a radix (e.g. 0x123n) because the canonical form is not enforced when a radix is present.

  // Original code
  console.log(!!0n, !!1n, 123n === 123n)
  console.log(!!0x0n, !!0x1n, 123n === 0x7Bn)
  // Old output
  console.log(false, true, true);
  console.log(true, true, false);
  // New output
  console.log(false, true, true);
  console.log(!!0x0n, !!0x1n, 123n === 0x7Bn);

• Add some improvements to the JavaScript minifier

  This release adds more cases to the JavaScript minifier, including support for inlining String.fromCharCode and String.prototype.charCodeAt when possible:

  // Original code
  document.onkeydown = e => e.keyCode === 'A'.charCodeAt(0) && console.log(String.fromCharCode(55358, 56768))
  // Old output (with --minify)
  document.onkeydown=o=>o.keyCode==="A".charCodeAt(0)&&console.log(String.fromCharCode(55358,56768));
  // New output (with --minify)
  document.onkeydown=o=>o.keyCode===65&&console.log("🧀");

  In addition, immediately-invoked function expressions (IIFEs) that return a single expression are now inlined when minifying. This makes it possible to use IIFEs in combination with @__PURE__ annotations to annotate arbitrary expressions as side-effect free without the IIFE wrapper impacting code size. For example:

  // Original code
  const sideEffectFreeOffset = /* @__PURE__ */ (() => computeSomething())()
  use(sideEffectFreeOffset)
  // Old output (with --minify)
  const e=(()=>computeSomething())();use(e);
  // New output (with --minify)
  const e=computeSomething();use(e);

• Automatically prefix the mask-composite CSS property for WebKit (#3493)

... (truncated)

• 6073a3a publish 0.19.6 to npm
• 19ff9d3 async arrow functions are not IIFEs
• 9fa4e79 inline IIFEs that return a single expression
• 6c4aa2c fix #3454: crash with jsx-dev before super() call
• 4a1e576 fix #3467: formatMessages edge case perf hack
• 20c2604 add some go tests for message formatting
• 5271f82 silence new warnings within node_modules
• 83e8c7f fix #3485: map subpath imports to node built-ins
• 07e527d fix #3453: use Symbol.for for missing symbols
• 50cead7 try adding a warning about suspicious uses of =>
• Additional commits viewable in compare view

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