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babel.config.js
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babel.config.js
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let defaultPresets;
// We release a ES version of Material-UI.
// It's something that matches the latest official supported features of JavaScript.
// Nothing more (stage-1, etc), nothing less (require, etc).
if (process.env.BABEL_ENV === 'es') {
defaultPresets = [];
} else {
defaultPresets = [
[
'@babel/preset-env',
{
bugfixes: true,
modules: ['esm', 'production-umd'].includes(process.env.BABEL_ENV) ? false : 'commonjs',
},
],
];
}
const defaultAlias = {
'@material-ui/core': './packages/material-ui/src',
'@material-ui/docs': './packages/material-ui-docs/src',
'@material-ui/icons': './packages/material-ui-icons/src',
'@material-ui/lab': './packages/material-ui-lab/src',
'@material-ui/styles': './packages/material-ui-styles/src',
'@material-ui/system': './packages/material-ui-system/src',
'@material-ui/utils': './packages/material-ui-utils/src',
};
const productionPlugins = [
'@babel/plugin-transform-react-constant-elements',
'babel-plugin-transform-dev-warning',
['babel-plugin-react-remove-properties', { properties: ['data-mui-test'] }],
[
'babel-plugin-transform-react-remove-prop-types',
{
mode: 'unsafe-wrap',
},
],
];
module.exports = {
presets: defaultPresets.concat(['@babel/preset-react', '@babel/preset-typescript']),
plugins: [
'babel-plugin-optimize-clsx',
['@babel/plugin-proposal-class-properties', { loose: true }],
['@babel/plugin-proposal-object-rest-spread', { loose: true }],
// any package needs to declare 7.4.4 as a runtime dependency. default is ^7.0.0
['@babel/plugin-transform-runtime', { version: '^7.4.4' }],
// for IE 11 support
'@babel/plugin-transform-object-assign',
],
ignore: [/@babel[\\|/]runtime/], // Fix a Windows issue.
env: {
cjs: {
plugins: productionPlugins,
},
coverage: {
plugins: [
'babel-plugin-istanbul',
[
'babel-plugin-module-resolver',
{
root: ['./'],
alias: defaultAlias,
},
],
],
},
development: {
plugins: [
[
'babel-plugin-module-resolver',
{
alias: {
modules: './modules',
},
},
],
],
},
esm: {
plugins: [...productionPlugins, ['@babel/plugin-transform-runtime', { useESModules: true }]],
},
es: {
plugins: [...productionPlugins, ['@babel/plugin-transform-runtime', { useESModules: true }]],
},
production: {
plugins: [...productionPlugins, ['@babel/plugin-transform-runtime', { useESModules: true }]],
},
'production-umd': {
plugins: [...productionPlugins, ['@babel/plugin-transform-runtime', { useESModules: true }]],
},
test: {
sourceMaps: 'both',
plugins: [
[
'babel-plugin-module-resolver',
{
root: ['./'],
alias: defaultAlias,
},
],
],
},
benchmark: {
plugins: [
...productionPlugins,
[
'babel-plugin-module-resolver',
{
root: ['./'],
alias: defaultAlias,
},
],
],
},
},
};