chore(deps): update dependency esbuild to v0.27.3 by renovate[bot] · Pull Request #237 · eik-lib/esbuild-plugin

renovate · 2026-03-01T01:10:25Z

This PR contains the following updates:

Package	Change	Age	Confidence
esbuild	`0.27.0` → `0.27.3`

Release Notes

evanw/esbuild (esbuild)

`v0.27.3`

Compare Source

Preserve URL fragments in data URLs (#4370)

Consider the following HTML, CSS, and SVG:

index.html:

<!DOCTYPE html>
<html>
  <head><link rel="stylesheet" href="icons.css"></head>
  <body><div class="triangle"></div></body>
</html>

icons.css:

.triangle {
  width: 10px;
  height: 10px;
  background: currentColor;
  clip-path: url(./triangle.svg#x);
}

triangle.svg:

<svg xmlns="http://www.w3.org/2000/svg">
  <defs>
    <clipPath id="x">
      <path d="M0 0H10V10Z"/>
    </clipPath>
  </defs>
</svg>

The CSS uses a URL fragment (the #x) to reference the clipPath element in the SVG file. Previously esbuild's CSS bundler didn't preserve the URL fragment when bundling the SVG using the dataurl loader, which broke the bundled CSS. With this release, esbuild will now preserve the URL fragment in the bundled CSS:

/* icons.css */
.triangle {
  width: 10px;
  height: 10px;
  background: currentColor;
  clip-path: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"><defs><clipPath id="x"><path d="M0 0H10V10Z"/></clipPath></defs></svg>#x');
}

Parse and print CSS @scope rules (#4322)

This release includes dedicated support for parsing @scope rules in CSS. These rules include optional "start" and "end" selector lists. One important consequence of this is that the local/global status of names in selector lists is now respected, which improves the correctness of esbuild's support for CSS modules. Minification of selectors inside @scope rules has also improved slightly.

Here's an example:
```
/* Original code */
@&#8203;scope (:global(.foo)) to (:local(.bar)) {
  .bar {
    color: red;
  }
}

/* Old output (with --loader=local-css --minify) */
@&#8203;scope (:global(.foo)) to (:local(.bar)){.o{color:red}}

/* New output (with --loader=local-css --minify) */
@&#8203;scope(.foo)to (.o){.o{color:red}}
```
Fix a minification bug with lowering of for await (#4378, #4385)

This release fixes a bug where the minifier would incorrectly strip the variable in the automatically-generated catch clause of lowered for await loops. The code that generated the loop previously failed to mark the internal variable references as used.
Update the Go compiler from v1.25.5 to v1.25.7 (#4383, #4388)

This PR was contributed by @MikeWillCook.

`v0.27.2`

Compare Source

Allow import path specifiers starting with #/ (#4361)

Previously the specification for package.json disallowed import path specifiers starting with #/, but this restriction has recently been relaxed and support for it is being added across the JavaScript ecosystem. One use case is using it for a wildcard pattern such as mapping #/* to ./src/* (previously you had to use another character such as #_* instead, which was more confusing). There is some more context in nodejs/node#49182.

This change was contributed by @hybrist.

Automatically add the -webkit-mask prefix (#4357, #4358)

This release automatically adds the -webkit- vendor prefix for the mask CSS shorthand property:

/* Original code */
main {
  mask: url(x.png) center/5rem no-repeat
}

/* Old output (with --target=chrome110) */
main {
  mask: url(x.png) center/5rem no-repeat;
}

/* New output (with --target=chrome110) */
main {
  -webkit-mask: url(x.png) center/5rem no-repeat;
  mask: url(x.png) center/5rem no-repeat;
}

This change was contributed by @BPJEnnova.

Additional minification of switch statements (#4176, #4359)

This release contains additional minification patterns for reducing switch statements. Here is an example:

// Original code
switch (x) {
  case 0:
    foo()
    break
  case 1:
  default:
    bar()
}

// Old output (with --minify)
switch(x){case 0:foo();break;case 1:default:bar()}

// New output (with --minify)
x===0?foo():bar();

Forbid using declarations inside switch clauses (#4323)

This is a rare change to remove something that was previously possible. The Explicit Resource Management proposal introduced using declarations. These were previously allowed inside case and default clauses in switch statements. This had well-defined semantics and was already widely implemented (by V8, SpiderMonkey, TypeScript, esbuild, and others). However, it was considered to be too confusing because of how scope works in switch statements, so it has been removed from the specification. This edge case will now be a syntax error. See tc39/proposal-explicit-resource-management#215 and rbuckton/ecma262#14 for details.

Here is an example of code that is no longer allowed:
```
switch (mode) {
  case 'read':
    using readLock = db.read()
    return readAll(readLock)

  case 'write':
    using writeLock = db.write()
    return writeAll(writeLock)
}
```
That code will now have to be modified to look like this instead (note the additional { and } block statements around each case body):
```
switch (mode) {
  case 'read': {
    using readLock = db.read()
    return readAll(readLock)
  }
  case 'write': {
    using writeLock = db.write()
    return writeAll(writeLock)
  }
}
```
This is not being released in one of esbuild's breaking change releases since this feature hasn't been finalized yet, and esbuild always tracks the current state of the specification (so esbuild's previous behavior was arguably incorrect).

`v0.27.1`

Compare Source

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:

// Original code
function foo(callback) {
  if (DEBUG) stack.push(callback.name);
  try {
    callback();
  } finally {
    if (DEBUG) stack.pop();
  }
}

// Old output (with --minify --define:DEBUG=false)
function foo(a){try{a()}finally{}}

// New output (with --minify --define:DEBUG=false)
function foo(a){a()}

Allow tree-shaking of the Symbol constructor

With this release, calling Symbol is now considered to be side-effect free when the argument is known to be a primitive value. This means esbuild can now tree-shake module-level symbol variables:

// Original code
const a = Symbol('foo')
const b = Symbol(bar)

// Old output (with --tree-shaking=true)
const a = Symbol("foo");
const b = Symbol(bar);

// New output (with --tree-shaking=true)
const b = Symbol(bar);

Configuration

📅 Schedule: Branch creation - "before 4am on the first day of the month" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

If you want to rebase/retry this PR, check this box

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github-actions · 2026-03-02T08:57:20Z

🎉 This PR is included in version 2.0.12 🎉

The release is available on:

Your semantic-release bot 📦🚀

chore(deps): update dependency esbuild to v0.27.3

3ae8efe

renovate bot force-pushed the renovate/esbuild-0.x branch from ce64a89 to 3ae8efe Compare March 1, 2026 04:47

renovate bot merged commit 93ac6d1 into main Mar 1, 2026
6 checks passed

renovate bot deleted the renovate/esbuild-0.x branch March 1, 2026 20:56

github-actions bot added the released label Mar 2, 2026

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chore(deps): update dependency esbuild to v0.27.3#237

chore(deps): update dependency esbuild to v0.27.3#237
renovate[bot] merged 1 commit intomainfrom
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renovate bot commented Mar 1, 2026

Release Notes

v0.27.3

v0.27.2

v0.27.1

Configuration

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`v0.27.3`

`v0.27.2`

`v0.27.1`