Bump esbuild from 0.12.6 to 0.12.8

[dependabot]

Bumps esbuild from 0.12.6 to 0.12.8.

Release notes

Sourced from esbuild's releases.

v0.12.8

• Plugins can now specify sideEffects: false (#1009)

  The default path resolution behavior in esbuild determines if a given file can be considered side-effect free (in the Webpack-specific sense) by reading the contents of the nearest enclosing package.json file and looking for "sideEffects": false. However, up until now this was impossible to achieve in an esbuild plugin because there was no way of returning this metadata back to esbuild.

  With this release, esbuild plugins can now return sideEffects: false to mark a file as having no side effects. Here's an example:

  esbuild.build({
    entryPoints: ['app.js'],
    bundle: true,
    plugins: [{
      name: 'env-plugin',
      setup(build) {
        build.onResolve({ filter: /^env$/ }, args => ({
          path: args.path,
          namespace: 'some-ns',
          sideEffects: false,
        }))
        build.onLoad({ filter: /.*/, namespace: 'some-ns' }, () => ({
          contents: `export default self.env || (self.env = getEnv())`,
        }))
      },
    }],
  })

  This plugin creates a virtual module that can be generated by importing the string env. However, since the plugin returns sideEffects: false, the generated virtual module will not be included in the bundle if all of the imported values from the module env end up being unused.

  This feature was contributed by @​chriscasola.

• Remove a warning about unsupported source map comments (#1358)

  This removes a warning that indicated when a source map comment couldn't be supported. Specifically, this happens when you enable source map generation and esbuild encounters a file with a source map comment pointing to an external file but doesn't have enough information to know where to look for that external file (basically when the source file doesn't have an associated directory to use for path resolution). In this case esbuild can't respect the input source map because it cannot be located. The warning was annoying so it has been removed. Source maps still won't work, however.

v0.12.7

• Quote object properties that are modern Unicode identifiers (#1349)

  In ES6 and above, an identifier is a character sequence starting with a character in the ID_Start Unicode category and followed by zero or more characters in the ID_Continue Unicode category, and these categories must be drawn from Unicode version 5.1 or above.

  But in ES5, an identifier is a character sequence starting with a character in one of the Lu, Ll, Lt, Lm, Lo, Nl Unicode categories and followed by zero or more characters in the Lu, Ll, Lt, Lm, Lo, Nl, Mn, Mc, Nd, Pc Unicode categories, and these categories must be drawn from Unicode version 3.0 or above.

  Previously esbuild always used the ES6+ identifier validation test when deciding whether to use an identifier or a quoted string to encode an object property but with this release, it will use the ES5 validation test instead:

  // Original code
  x.ꓷꓶꓲꓵꓭꓢꓱ = { ꓷꓶꓲꓵꓭꓢꓱ: y };
  // Old output
  x.ꓷꓶꓲꓵꓭꓢꓱ = { ꓷꓶꓲꓵꓭꓢꓱ: y };

... (truncated)

Changelog

Sourced from esbuild's changelog.

0.12.8

• Plugins can now specify sideEffects: false (#1009)

  The default path resolution behavior in esbuild determines if a given file can be considered side-effect free (in the Webpack-specific sense) by reading the contents of the nearest enclosing package.json file and looking for "sideEffects": false. However, up until now this was impossible to achieve in an esbuild plugin because there was no way of returning this metadata back to esbuild.

  With this release, esbuild plugins can now return sideEffects: false to mark a file as having no side effects. Here's an example:

  esbuild.build({
    entryPoints: ['app.js'],
    bundle: true,
    plugins: [{
      name: 'env-plugin',
      setup(build) {
        build.onResolve({ filter: /^env$/ }, args => ({
          path: args.path,
          namespace: 'some-ns',
          sideEffects: false,
        }))
        build.onLoad({ filter: /.*/, namespace: 'some-ns' }, () => ({
          contents: `export default self.env || (self.env = getEnv())`,
        }))
      },
    }],
  })

  This plugin creates a virtual module that can be generated by importing the string env. However, since the plugin returns sideEffects: false, the generated virtual module will not be included in the bundle if all of the imported values from the module env end up being unused.

  This feature was contributed by @​chriscasola.

• Remove a warning about unsupported source map comments (#1358)

  This removes a warning that indicated when a source map comment couldn't be supported. Specifically, this happens when you enable source map generation and esbuild encounters a file with a source map comment pointing to an external file but doesn't have enough information to know where to look for that external file (basically when the source file doesn't have an associated directory to use for path resolution). In this case esbuild can't respect the input source map because it cannot be located. The warning was annoying so it has been removed. Source maps still won't work, however.

0.12.7

• Quote object properties that are modern Unicode identifiers (#1349)

  In ES6 and above, an identifier is a character sequence starting with a character in the ID_Start Unicode category and followed by zero or more characters in the ID_Continue Unicode category, and these categories must be drawn from Unicode version 5.1 or above.

  But in ES5, an identifier is a character sequence starting with a character in one of the Lu, Ll, Lt, Lm, Lo, Nl Unicode categories and followed by zero or more characters in the Lu, Ll, Lt, Lm, Lo, Nl, Mn, Mc, Nd, Pc Unicode categories, and these categories must be drawn from Unicode version 3.0 or above.

  Previously esbuild always used the ES6+ identifier validation test when deciding whether to use an identifier or a quoted string to encode an object property but with this release, it will use the ES5 validation test instead:

  // Original code
  x.ꓷꓶꓲꓵꓭꓢꓱ = { ꓷꓶꓲꓵꓭꓢꓱ: y };

... (truncated)

Commits

• 1eb9f0e publish 0.12.8 to npm
• 6b42c96 fix #1358: remove warning about source map comment
• 3a45460 Merge remote-tracking branch 'origin/master'
• 4a98ad7 publish 0.12.7 to npm
• 6ea75fe Allow OnResolve plugins to mark modules as side effect free (#1313)
• a5f1387 fix(linker): add missing esm flag (#1338)
• 6dc45ba fix #1357: "--metafile" with "--watch"
• d3ef487 fix #1355: ignore tsconfig.json in node_modules
• 5065800 fix #1349: quote modern unicode object properties
• 236039d runtime: check "for-of" not "=>" for es6 support
• Additional commits viewable in compare view

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[dependabot]

Superseded by #313.