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preset.ts
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preset.ts
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import alterObjectAssign from 'babel-plugin-alter-object-assign'
const ENV = process.env.BABEL_ENV || process.env.NODE_ENV
export default (
context: any,
{
asyncToPromises = process.env.BILI_ASYNC_TO_PROMISES,
jsx = process.env.BILI_JSX,
objectAssign = process.env.BILI_OBJECT_ASSIGN,
minimal = process.env.BILI_MINIMAL
} = {}
) => {
const presets = [
!minimal && [
require('@babel/preset-env').default,
{
modules: ENV === 'test' ? 'auto' : false,
exclude: [
'transform-regenerator',
'transform-async-to-generator',
'proposal-object-rest-spread'
]
}
],
require('@babel/preset-typescript')
].filter(Boolean)
const plugins = [
[
require('@babel/plugin-transform-react-jsx'),
{
pragma: jsx === 'react' ? 'React.createElement' : jsx
}
],
[
require('@babel/plugin-proposal-object-rest-spread'),
{
useBuiltIns: true,
loose: true
}
],
[require('@babel/plugin-proposal-optional-chaining')],
[require('@babel/plugin-proposal-nullish-coalescing-operator')],
[
alterObjectAssign,
{
objectAssign
}
],
asyncToPromises && require('babel-plugin-transform-async-to-promises')
].filter(Boolean)
return {
presets,
plugins
}
}