Bump esbuild from 0.14.47 to 0.21.3

[dependabot[bot]]

Bumps esbuild from 0.14.47 to 0.21.3.

Release notes

Sourced from esbuild's releases.

v0.21.3

• Implement the decorator metadata proposal (#3760)

  This release implements the decorator metadata proposal, which is a sub-proposal of the decorators proposal. Microsoft shipped the decorators proposal in TypeScript 5.0 and the decorator metadata proposal in TypeScript 5.2, so it's important that esbuild also supports both of these features. Here's a quick example:

  // Shim the "Symbol.metadata" symbol
  Symbol.metadata ??= Symbol('Symbol.metadata')
  const track = (_, context) => {
  (context.metadata.names ||= []).push(context.name)
  }
  class Foo {
  @​track foo = 1
  @​track bar = 2
  }
  // Prints ["foo", "bar"]
  console.log(Foo[Symbol.metadata].names)
  

  ⚠️ WARNING ⚠️

  This proposal has been marked as "stage 3" which means "recommended for implementation". However, it's still a work in progress and isn't a part of JavaScript yet, so keep in mind that any code that uses JavaScript decorator metadata may need to be updated as the feature continues to evolve. If/when that happens, I will update esbuild's implementation to match the specification. I will not be supporting old versions of the specification.

• Fix bundled decorators in derived classes (#3768)

  In certain cases, bundling code that uses decorators in a derived class with a class body that references its own class name could previously generate code that crashes at run-time due to an incorrect variable name. This problem has been fixed. Here is an example of code that was compiled incorrectly before this fix:

  class Foo extends Object {
    @(x => x) foo() {
      return Foo
    }
  }
  console.log(new Foo().foo())
  

• Fix tsconfig.json files inside symlinked directories (#3767)

  This release fixes an issue with a scenario involving a tsconfig.json file that extends another file from within a symlinked directory that uses the paths feature. In that case, the implicit baseURL value should be based on the real path (i.e. after expanding all symbolic links) instead of the original path. This was already done for other files that esbuild resolves but was not yet done for tsconfig.json because it's special-cased (the regular path resolver can't be used because the information inside tsconfig.json is involved in path resolution). Note that this fix no longer applies if the --preserve-symlinks setting is enabled.

v0.21.2

• Correct this in field and accessor decorators (#3761)

  This release changes the value of this in initializers for class field and accessor decorators from the module-level this value to the appropriate this value for the decorated element (either the class or the instance). It was previously incorrect due to lack of test coverage. Here's an example of a decorator that doesn't work without this change:

  const dec = () => function() { this.bar = true }
  

... (truncated)

Changelog

Sourced from esbuild's changelog.

Changelog: 2022

This changelog documents all esbuild versions published in the year 2022 (versions 0.14.11 through 0.16.12).

0.16.12

• Loader defaults to js for extensionless files (#2776)

  Certain packages contain files without an extension. For example, the yargs package contains the file yargs/yargs which has no extension. Node, Webpack, and Parcel can all understand code that imports yargs/yargs because they assume that the file is JavaScript. However, esbuild was previously unable to understand this code because it relies on the file extension to tell it how to interpret the file. With this release, esbuild will now assume files without an extension are JavaScript files. This can be customized by setting the loader for "" (the empty string, representing files without an extension) to another loader. For example, if you want files without an extension to be treated as CSS instead, you can do that like this:

  • CLI:

    esbuild --bundle --loader:=css
    

  • JS:

    esbuild.build({
      bundle: true,
      loader: { '': 'css' },
    })
    

  • Go:

    api.Build(api.BuildOptions{
      Bundle: true,
      Loader: map[string]api.Loader{"": api.LoaderCSS},
    })
    

  In addition, the "type" field in package.json files now only applies to files with an explicit .js, .jsx, .ts, or .tsx extension. Previously it was incorrectly applied by esbuild to all files that had an extension other than .mjs, .mts, .cjs, or .cts including extensionless files. So for example an extensionless file in a "type": "module" package is now treated as CommonJS instead of ESM.

0.16.11

• Avoid a syntax error in the presence of direct eval (#2761)

  The behavior of nested function declarations in JavaScript depends on whether the code is run in strict mode or not. It would be problematic if esbuild preserved nested function declarations in its output because then the behavior would depend on whether the output was run in strict mode or not instead of respecting the strict mode behavior of the original source code. To avoid this, esbuild transforms nested function declarations to preserve the intended behavior of the original source code regardless of whether the output is run in strict mode or not:

  // Original code
  if (true) {
    function foo() {}
    console.log(!!foo)
    foo = null
    console.log(!!foo)
  }
  

... (truncated)

Commits

• efa3dd2 publish 0.21.3 to npm
• 5e7cf25 fix #3760: implement decorator metadata proposal
• bd0b13b lowering: always propagate class expression names
• 90acd14 explicit bitwise operators for initializer flags
• ba548df move decorator initializer list to after the class
• 66b7c6d fix #3768: bundled decorators in derived classes
• 6e6f15f fix #3767: tsconfig.json files inside symlinks
• b7dcb95 transform: reuse lowerField for auto-accessors
• b24180e publish 0.21.2 to npm
• f82e0ad fix #3761: this in field and accessor decorators
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #46.