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.babelrc.js
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.babelrc.js
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/** @format */
const _ = require( 'lodash' );
const path = require( 'path' );
const isCalypsoClient = process.env.CALYPSO_CLIENT === 'true';
const isCalypsoServer = process.env.CALYPSO_SERVER === 'true';
const isCalypso = isCalypsoClient || isCalypsoServer;
const modules = isCalypsoClient ? false : 'commonjs'; // only calypso should keep es6 modules
const codeSplit = require( './server/config' ).isEnabled( 'code-splitting' );
const config = {
presets: [
[
'@babel/env',
{
modules,
targets: {
browsers: [ 'last 2 versions', 'Safari >= 10', 'iOS >= 10', 'ie >= 11' ],
},
exclude: [ 'transform-classes', 'transform-template-literals' ], // transform-classes is added manually later.
},
],
'@babel/stage-2',
'@babel/react',
],
plugins: _.compact( [
// the two class transforms are to emulate exactly how babel 6 handled classes.
// it very slightly diverges from spec but also is more concise.
// see: http://new.babeljs.io/docs/en/next/v7-migration.html#babel-plugin-proposal-class-properties
[ '@babel/plugin-proposal-class-properties', { loose: true } ],
[ '@babel/plugin-transform-classes', { loose: false } ],
[ '@babel/plugin-transform-template-literals', { loose: true } ],
! isCalypso && 'add-module-exports',
isCalypso && [
path.join(
__dirname,
'server',
'bundler',
'babel',
'babel-plugin-transform-wpcalypso-async'
),
{ async: isCalypsoClient && codeSplit },
],
'@babel/plugin-proposal-export-default-from',
'@babel/transform-runtime',
isCalypsoClient && './inline-imports.js',
] ),
env: {
test: {
plugins: [ './server/bundler/babel/babel-lodash-es' ],
},
},
};
module.exports = config;