benchmarks/babelPreset.js
const createConfig = ({ modules }) => ({
presets: [
[
'@babel/preset-env',
{
loose: true,
modules,
exclude: ['transform-typeof-symbol'],
targets: {
browsers: [
'chrome 38',
'android 4',
'firefox 40',
'ios_saf 7',
'safari 7',
'ie 10',
'ie_mob 11',
'edge 12',
'opera 16',
'op_mini 12',
'and_uc 9',
'and_chr 38'
]
}
}
],
'@babel/preset-react',
'@babel/preset-flow'
],
plugins: [
'@babel/plugin-transform-flow-strip-types',
['babel-plugin-transform-react-remove-prop-types', { mode: 'wrap' }],
['@babel/plugin-proposal-class-properties', { loose: true }],
['@babel/plugin-proposal-object-rest-spread', { useBuiltIns: true }],
'@babel/plugin-proposal-nullish-coalescing-operator'
].concat(modules ? ['babel-plugin-add-module-exports'] : [])
});
module.exports = function() {
return process.env.BABEL_ENV === 'commonjs' || process.env.NODE_ENV === 'test'
? createConfig({ modules: 'commonjs' })
: createConfig({ modules: false });
};