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Update dependencies babel preset with recent changes #6887

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merged 2 commits into from Apr 29, 2019
Merged

Update dependencies babel preset with recent changes #6887

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54ca489
Update dependencies preset to support browserslist
skoging Apr 24, 2019
6bb900e
Loose mode array destructuring for hooks in dependencies
skoging Apr 24, 2019
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39 changes: 28 additions & 11 deletions packages/babel-preset-react-app/dependencies.js
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Expand Up @@ -84,17 +84,11 @@ module.exports = function(api, opts) {
// Latest stable ECMAScript features
require('@babel/preset-env').default,
{
// We want Create React App to be IE 9 compatible until React itself
// no longer works with IE 9
targets: {
ie: 9,
},
// Users cannot override this behavior because this Babel
// configuration is highly tuned for ES5 support
ignoreBrowserslistConfig: true,
// If users import all core-js they're probably not concerned with
// bundle size. We shouldn't rely on magic to try and shrink it.
useBuiltIns: false,
// Allow importing core-js in entrypoint and use browserlist to select polyfills
useBuiltIns: 'entry',
// Set the corejs version we are using to avoid warnings in console
// This will need to change once we upgrade to corejs@3
corejs: 3,
// Do not transform modules to CJS
modules: false,
// Exclude transforms that make all code slower
Expand All @@ -103,6 +97,29 @@ module.exports = function(api, opts) {
],
].filter(Boolean),
plugins: [
// Necessary to include regardless of the environment because
// in practice some other transforms (such as object-rest-spread)
// don't work without it: https://github.com/babel/babel/issues/7215
[
require('@babel/plugin-transform-destructuring').default,
{
// Use loose mode for performance:
// https://github.com/facebook/create-react-app/issues/5602
loose: false,
selectiveLoose: [
'useState',
'useEffect',
'useContext',
'useReducer',
'useCallback',
'useMemo',
'useRef',
'useImperativeHandle',
'useLayoutEffect',
'useDebugValue',
],
},
],
// Polyfills the runtime needed for async/await, generators, and friends
// https://babeljs.io/docs/en/babel-plugin-transform-runtime
[
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