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babel.config.js
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babel.config.js
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let defaultPreset
// all available BABEL_ENV, NODE_ENV are placed in scripts/build.js
const babelEnv = process.env.BABEL_ENV
if (babelEnv === 'es') {
defaultPreset = []
} else {
defaultPreset = [
[
'@babel/preset-env',
{
bugfixes: true,
modules: 'commonjs'
}
]
]
}
const productionPlugins = []
module.exports = {
presets: defaultPreset.concat(['@babel/preset-typescript']),
plugins: [
['@babel/plugin-proposal-class-properties', { loose: true }],
['@babel/plugin-transform-runtime', { version: '^7.4.4' }],
'@babel/plugin-transform-object-assign'
],
/**
* will match envName(default: process.env.BABEL_ENV || process.env.NODE_ENV || "development")
* @see https://babel.dev/docs/en/options#env
* @see https://babel.dev/docs/en/options#envname
*/
env: {
cjs: {
plugins: productionPlugins
},
es: {
plugins: [
...productionPlugins,
['@babel/plugin-transform-runtime', { useESModules: true }]
]
},
production: {
plugins: [
...productionPlugins,
['@babel/plugin-transform-runtime', { useESModules: true }]
]
}
}
}