undici build(deps-dev): bump esbuild from 0.25.12 to 0.27.1

Bumps esbuild from 0.25.12 to 0.27.1.

Release notes

v0.27.1
Fix bundler bug with var nested inside if (#4348)

This release fixes a bug with the bundler that happens when importing an ES module using require (which causes it to be wrapped) and there's a top-level var inside an if statement without being wrapped in a { ... } block (and a few other conditions). The bundling transform needed to hoist these var declarations outside of the lazy ES module wrapper for correctness. See the issue for details.
Fix minifier bug with for inside try inside label (#4351)

This fixes an old regression from version v0.21.4. Some code was introduced to move the label inside the try statement to address a problem with transforming labeled for await loops to avoid the await (the transformation involves converting the for await loop into a for loop and wrapping it in a try statement). However, it introduces problems for cross-compiled JVM code that uses all three of these features heavily. This release restricts this transform to only apply to for loops that esbuild itself generates internally as part of the for await transform. Here is an example of some affected code:
// Original code
d: {
  e: {
    try {
      while (1) { break d }
    } catch { break e; }
  }
}
// Old output (with --minify)
a:try{e:for(;;)break a}catch{break e}
// New output (with --minify)
a:e:try{for(;;)break a}catch{break e}
Inline IIFEs containing a single expression (#4354)

Previously inlining of IIFEs (immediately-invoked function expressions) only worked if the body contained a single return statement. Now it should also work if the body contains a single expression statement instead:
// Original code
const foo = () => {
  const cb = () => {
    console.log(x())
  }
  return cb()
}
// Old output (with --minify)
const foo=()=>(()=>{console.log(x())})();
// New output (with --minify)
const foo=()=>{console.log(x())};
The minifier now strips empty finally clauses (#4353)

This improvement means that finally clauses containing dead code can potentially cause the associated try statement to be removed from the output entirely in minified builds:

... (truncated)

Changelog

Sourced from esbuild's changelog.

0.27.1
Fix bundler bug with var nested inside if (#4348)

This release fixes a bug with the bundler that happens when importing an ES module using require (which causes it to be wrapped) and there's a top-level var inside an if statement without being wrapped in a { ... } block (and a few other conditions). The bundling transform needed to hoist these var declarations outside of the lazy ES module wrapper for correctness. See the issue for details.
Fix minifier bug with for inside try inside label (#4351)

This fixes an old regression from version v0.21.4. Some code was introduced to move the label inside the try statement to address a problem with transforming labeled for await loops to avoid the await (the transformation involves converting the for await loop into a for loop and wrapping it in a try statement). However, it introduces problems for cross-compiled JVM code that uses all three of these features heavily. This release restricts this transform to only apply to for loops that esbuild itself generates internally as part of the for await transform. Here is an example of some affected code:
// Original code
d: {
  e: {
    try {
      while (1) { break d }
    } catch { break e; }
  }
}
// Old output (with --minify)
a:try{e:for(;;)break a}catch{break e}
// New output (with --minify)
a:e:try{for(;;)break a}catch{break e}
Inline IIFEs containing a single expression (#4354)

Previously inlining of IIFEs (immediately-invoked function expressions) only worked if the body contained a single return statement. Now it should also work if the body contains a single expression statement instead:
// Original code
const foo = () => {
  const cb = () => {
    console.log(x())
  }
  return cb()
}
// Old output (with --minify)
const foo=()=>(()=>{console.log(x())})();
// New output (with --minify)
const foo=()=>{console.log(x())};
The minifier now strips empty finally clauses (#4353)

This improvement means that finally clauses containing dead code can potentially cause the associated try statement to be removed from the output entirely in minified builds:

... (truncated)

Commits

5e0e56d publish 0.27.1 to npm
5a89732 fix #4354: improve IIFE inlining for expressions
b940218 minify: move unused expr simplification later
c46d498 fix #4353: remove empty try/finally clauses
7a72735 fix #4348: bundler bug with var inside if
4e4e177 fix #4351: label + try + for minifier bug
d6427c9 fix: deno release url wrong comment (#4326)
48e3e19 calling Symbol.for with a primitive never throws
4ff88d0 update decorator-tests.js snapshot
1877e60 calling Symbol with a primitive will never throw
Additional commits viewable in compare view

Maintainer changes

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Dec 08 '25 22:12 dependabot[bot]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 92.85%. Comparing base (e3fedb0) to head (36d33e6). :warning: Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4694      +/-   ##
==========================================
+ Coverage   92.84%   92.85%   +0.01%     
==========================================
  Files         107      107              
  Lines       33455    33455              
==========================================
+ Hits        31060    31065       +5     
+ Misses       2395     2390       -5

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Dec 08 '25 22:12 codecov-commenter

Superseded by #4709.

Dec 22 '25 22:12 dependabot[bot]