Bump esbuild from 0.15.18 to 0.21.4

[dependabot]

Bumps esbuild from 0.15.18 to 0.21.4.

Release notes

Sourced from esbuild's releases.

v0.21.4

• Update support for import assertions and import attributes in node (#3778)

  Import assertions (the assert keyword) have been removed from node starting in v22.0.0. So esbuild will now strip them and generate a warning with --target=node22 or above:

  ▲ [WARNING] The "assert" keyword is not supported in the configured target environment ("node22") [assert-to-with]
  example.mjs:1:40:
    1 │ import json from "esbuild/package.json" assert { type: "json" }
      │                                         ~~~~~~
      ╵                                         with
  
  Did you mean to use "with" instead of "assert"?
  

  Import attributes (the with keyword) have been backported to node 18 starting in v18.20.0. So esbuild will no longer strip them with --target=node18.N if N is 20 or greater.

• Fix for await transform when a label is present

  This release fixes a bug where the for await transform, which wraps the loop in a try statement, previously failed to also move the loop's label into the try statement. This bug only affects code that uses both of these features in combination. Here's an example of some affected code:

  // Original code
  async function test() {
    outer: for await (const x of [Promise.resolve([0, 1])]) {
      for (const y of x) if (y) break outer
      throw 'fail'
    }
  }
  // Old output (with --target=es6)
  function test() {
  return __async(this, null, function* () {
  outer: try {
  for (var iter = __forAwait([Promise.resolve([0, 1])]), more, temp, error; more = !(temp = yield iter.next()).done; more = false) {
  const x = temp.value;
  for (const y of x) if (y) break outer;
  throw "fail";
  }
  } catch (temp) {
  error = [temp];
  } finally {
  try {
  more && (temp = iter.return) && (yield temp.call(iter));
  } finally {
  if (error)
  throw error[0];
  }
  }

... (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

• 67cbf87 publish 0.21.4 to npm
• 4ad11c3 fix #3639, fix #3646: pass with to onResolve
• 516ca31 fix #3343: allow bundle-internal string aliases
• 9e2f304 fix #3416, fix #3425: better enum constant folding
• 8f1faf7 implement late constant-folding for && || ??
• 7d50a50 implement late constant-folding of string enums
• 1b29ac7 fold equality checks after cross-module inlining
• d7a8bf3 formatting support for @position-try (for #3773)
• 5069410 fix #3778: import assertions/attributes for node
• 11d568c run make update-compat-table
• Additional commits viewable in compare view

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