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Support browserslist in @babel/preset-env #6608

merged 7 commits into from Mar 14, 2019


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commented Mar 9, 2019

This PR brings back support for configuring the build output based on browserslist, as well as supporting @babel/polyfill in the entrypoint. This provides a huge improvement to the dev experience as it allows targeting modern browsers in development which makes certain language features like async/await much nicer to debug, while still supporting a broad range of browsers in production.

Including ie 9 in browserslist:

Modern browsers:

Closes #6198.

@ianschmitz ianschmitz added this to the 3.0 milestone Mar 9, 2019

@ianschmitz ianschmitz changed the title Presetenv browserslist Support browserslist in @babel/preset-env Mar 9, 2019

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@iansu iansu added this to In progress in v3 Mar 10, 2019

iansu and others added some commits Mar 10, 2019

Update docusaurus/docs/
Co-Authored-By: ianschmitz <>
Update docusaurus/docs/
Co-Authored-By: ianschmitz <>
@iansu iansu referenced this pull request Mar 10, 2019

@ianschmitz ianschmitz merged commit f4f20a2 into facebook:master Mar 14, 2019

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v3 automation moved this from In progress to Done Mar 14, 2019

@ianschmitz ianschmitz deleted the ianschmitz:presetenv-browserslist branch Mar 14, 2019

JoviDeCroock added a commit to JoviDeCroock/create-react-app that referenced this pull request Mar 15, 2019

Merge branch 'masterd' into feat/modern-build
* masterd: (24 commits)
  Add TypeScript linting support (facebook#6513)
  Support React Hooks (facebook#5602) (facebook#5997)
  Support browserslist in @babel/preset-env (facebook#6608)
  Add empty mock for http2 (facebook#5686)
  Add note about npx caching (facebook#6374)
  change named import into default import (facebook#6625)
  Stage files for commit after ejecting (facebook#5960)
  Upgrade dependencies (facebook#6614)
  Make compiler variable const instead of let (facebook#6621)
  Type check JSON files (facebook#6615)
  Change class components to functional components in templates (facebook#6451)
  Convert JSON.stringify \n to os.EOL when writing tsconfig.json (facebook#6610)
  Update html-webpack-plugin (facebook#6361)
  Enable click to go to error in console for TypeScript (facebook#6502)
  Update webpack-dev-server to 3.2.1 (facebook#6483)
  [docs] revert removal of newlines from html (facebook#6386)
  Prepare 2.1.8 release
  Reapply "Speed up TypeScript v2 (facebook#6406)" (facebook#6586)

# Conflicts:
#	packages/babel-preset-react-app/create.js
#	packages/react-scripts/scripts/build.js

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