deduped-babel-presets

Deduped Babel 6 Presets

Babel 6 presets and dependencies, with their shared dependencies manually deduplicated for npm2 compatibility.

This reduces the total size for an npm2 install of this module's dependencies from ~169 MB to ~7.8 MB:

Before	After

The following presets are available:

Core Babel Presets

Where not otherwise noted, these provide the equivalent official Babel preset:

• deduped-babel-presets/es2015
• deduped-babel-presets/es2016
• deduped-babel-presets/react
• deduped-babel-presets/stage-3
• deduped-babel-presets/stage-2
• deduped-babel-presets/stage-1 - babel-preset-stage-1 plus the transform-decorators-legacy plugin.
• deduped-babel-presets/stage-0 - provides the same additional plugins as babel-preset-stage-0, but includes deduped-babel-presets/stage-1 instead of babel-preset-stage-1.

Custom Presets

• deduped-babel-presets/es2015-loose - babel-preset-es2015 with loose mode enabled where available.

• deduped-babel-presets/es2015-native - babel-preset-es2015 with es2015-modules-commonjs disabled, for tree-shaking builds with tools like Rollup and Webpack v2.

• deduped-babel-presets/es2015-loose-native - a combination of the above two presets.

• deduped-babel-presets/react-hmre - development preset for React Hot Module Reloading and render() error catching.

• deduped-babel-presets/react-prod - production optimisations for React, using the following plugins:

  • react-constant-elements
  • react-remove-prop-types

• deduped-babel-presets/react-inline-elements - provides the react-inline-elements plugin.

  This is not included in the deduped-babel-presets/react-prod preset because it currently depends on having Symbol polyfilled to work in older browsers, which has the potential to introduce breaking changes to your production build.

  See React issue #5138.

• deduped-babel-presets/runtime - preset for using the transform-runtime plugin (with all of its features activated as per the default).

• deduped-babel-presets/runtime-helpers - transform-runtime configured solely to import helpers from babel-runtime when necessary.

• deduped-babel-presets/runtime-polyfill - transform-runtime configured to import helpers from babel-runtime and apply ES6 polyfills within your code.

• deduped-babel-presets/runtime-regenerator - transform-runtime configured to import helpers from babel-runtime and the regenerator runtime when necessary (i.e. when async/await syntax is used).

Plugins

Some plugins are useless without configuration, so deduped-babel-plugins exports the absolute path to them so you can use them in your own Babel plugin config:

• deduped-babel-presets/plugins/istanbul - the absolute path to the istanbul plugin for code coverage instrumentation, which needs exclude/include config for instrumentation.

MIT Licensed

pkgcount was used to manually deduplicate Babel 6 shared dependencies.