Bump github.com/evanw/esbuild from 0.12.10 to 0.18.8

[dependabot[bot]]

Bumps github.com/evanw/esbuild from 0.12.10 to 0.18.8.

Release notes

Sourced from github.com/evanw/esbuild's releases.

v0.18.8

• Implement transforming async generator functions (#2780)

  With this release, esbuild will now transform async generator functions into normal generator functions when the configured target environment doesn't support them. These functions behave similar to normal generator functions except that they use the Symbol.asyncIterator interface instead of the Symbol.iterator interface and the iteration methods return promises. Here's an example (helper functions are omitted):

  // Original code
  async function* foo() {
    yield Promise.resolve(1)
    await new Promise(r => setTimeout(r, 100))
    yield *[Promise.resolve(2)]
  }
  async function bar() {
    for await (const x of foo()) {
      console.log(x)
    }
  }
  bar()
  // New output (with --target=es6)
  function foo() {
  return __asyncGenerator(this, null, function* () {
  yield Promise.resolve(1);
  yield new __await(new Promise((r) => setTimeout(r, 100)));
  yield* __yieldStar([Promise.resolve(2)]);
  });
  }
  function bar() {
  return __async(this, null, function* () {
  try {
  for (var iter = __forAwait(foo()), more, temp, error; more = !(temp = yield iter.next()).done; more = false) {
  const x = temp.value;
  console.log(x);
  }
  } catch (temp) {
  error = [temp];
  } finally {
  try {
  more && (temp = iter.return) && (yield temp.call(iter));
  } finally {
  if (error)
  throw error[0];
  }
  }
  });
  }
  bar();
  

  This is an older feature that was added to JavaScript in ES2018 but I didn't implement the transformation then because it's a rarely-used feature. Note that esbuild already added support for transforming for await loops (the other part of the asynchronous iteration proposal) a year ago, so support for asynchronous iteration should now be complete.

... (truncated)

Changelog

Sourced from github.com/evanw/esbuild's changelog.

Changelog: 2021

This changelog documents all esbuild versions published in the year 2021 (versions 0.8.29 through 0.14.10).

0.14.10

• Enable tree shaking of classes with lowered static fields (#175)

  If the configured target environment doesn't support static class fields, they are converted into a call to esbuild's __publicField function instead. However, esbuild's tree-shaking pass treated this call as a side effect, which meant that all classes with static fields were ineligible for tree shaking. This release fixes the problem by explicitly ignoring calls to the __publicField function during tree shaking side-effect determination. Tree shaking is now enabled for these classes:

  // Original code
  class Foo { static foo = 'foo' }
  class Bar { static bar = 'bar' }
  new Bar()
  // Old output (with --tree-shaking=true --target=es6)
  class Foo {
  }
  __publicField(Foo, "foo", "foo");
  class Bar {
  }
  __publicField(Bar, "bar", "bar");
  new Bar();
  // New output (with --tree-shaking=true --target=es6)
  class Bar {
  }
  __publicField(Bar, "bar", "bar");
  new Bar();
  

• Treat --define:foo=undefined as an undefined literal instead of an identifier (#1407)

  References to the global variable undefined are automatically replaced with the literal value for undefined, which appears as void 0 when printed. This allows for additional optimizations such as collapsing undefined ?? bar into just bar. However, this substitution was not done for values specified via --define:. As a result, esbuild could potentially miss out on certain optimizations in these cases. With this release, it's now possible to use --define: to substitute something with an undefined literal:

  // Original code
  let win = typeof window !== 'undefined' ? window : {}
  // Old output (with --define:window=undefined --minify)
  let win=typeof undefined!="undefined"?undefined:{};
  // New output (with --define:window=undefined --minify)
  let win={};
  

• Add the --drop:debugger flag (#1809)

  Passing this flag causes all debugger; statements to be removed from the output. This is similar to the drop_debugger: true flag available in the popular UglifyJS and Terser JavaScript minifiers.

... (truncated)

Commits

• 9b233a4 publish 0.18.8 to npm
• d77b261 lower async generator functions (#3194)
• a1e4661 shorten some run-time helpers
• 880e78a fix hashes in tests
• 3bcf7f7 require an expression after yield *
• dbef654 throw errors when known symbols are missing
• cbc1137 forbid assigning to a constant when lowering using
• 1c11b59 wrap long import/export clauses
• adb8d19 publish 0.18.7 to npm
• 6c47cba fix an issue with SuppressedError
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #410.