chore(deps-dev): bump esbuild from 0.18.5 to 0.18.6

[dependabot]

Bumps esbuild from 0.18.5 to 0.18.6.

Release notes

Sourced from esbuild's releases.

v0.18.6

• Fix tree-shaking of classes with decorators (#3164)

  This release fixes a bug where esbuild incorrectly allowed tree-shaking on classes with decorators. Each decorator is a function call, so classes with decorators must never be tree-shaken. This bug was a regression that was unintentionally introduced in version 0.18.2 by the change that enabled tree-shaking of lowered private fields. Previously decorators were always lowered, and esbuild always considered the automatically-generated decorator code to be a side effect. But this is no longer the case now that esbuild analyzes side effects using the AST before lowering takes place. This bug was fixed by considering any decorator a side effect.

• Fix a minification bug involving function expressions (#3125)

  When minification is enabled, esbuild does limited inlining of const symbols at the top of a scope. This release fixes a bug where inlineable symbols were incorrectly removed assuming that they were inlined. They may not be inlined in cases where they were referenced by earlier constants in the body of a function expression. The declarations involved in these edge cases are now kept instead of being removed:

  // Original code
  {
    const fn = () => foo
    const foo = 123
    console.log(fn)
  }
  // Old output (with --minify-syntax)
  console.log((() => foo)());
  // New output (with --minify-syntax)
  {
  const fn = () => foo, foo = 123;
  console.log(fn);
  }

Changelog

Sourced from esbuild's changelog.

0.18.6

• Fix tree-shaking of classes with decorators (#3164)

  This release fixes a bug where esbuild incorrectly allowed tree-shaking on classes with decorators. Each decorator is a function call, so classes with decorators must never be tree-shaken. This bug was a regression that was unintentionally introduced in version 0.18.2 by the change that enabled tree-shaking of lowered private fields. Previously decorators were always lowered, and esbuild always considered the automatically-generated decorator code to be a side effect. But this is no longer the case now that esbuild analyzes side effects using the AST before lowering takes place. This bug was fixed by considering any decorator a side effect.

• Fix a minification bug involving function expressions (#3125)

  When minification is enabled, esbuild does limited inlining of const symbols at the top of a scope. This release fixes a bug where inlineable symbols were incorrectly removed assuming that they were inlined. They may not be inlined in cases where they were referenced by earlier constants in the body of a function expression. The declarations involved in these edge cases are now kept instead of being removed:

  // Original code
  {
    const fn = () => foo
    const foo = 123
    console.log(fn)
  }
  // Old output (with --minify-syntax)
  console.log((() => foo)());
  // New output (with --minify-syntax)
  {
  const fn = () => foo, foo = 123;
  console.log(fn);
  }

Commits

• f0b5803 publish 0.18.6 to npm
• 25a3963 fix #3125: bug with constant inlining and closures
• ddda7a8 prevent await using when await is unsupported
• 09394ba fixes and tests for for (using of x) edge case
• 1634a0b initial support for await using declarations
• ac5a078 make js decorator parsing more restrictive
• d565272 fix #3164: decorators must prevent tree-shaking
• 56a3e01 initial support for using declarations
• See full diff in compare view

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