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index.js
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index.js
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const r = require(`./resolver`)
function preset(context, options = {}) {
const { browser = false, debug = false, nodeVersion = `10.13.0` } = options
const { NODE_ENV, BABEL_ENV } = process.env
const IS_TEST = (BABEL_ENV || NODE_ENV) === `test`
const browserConfig = {
useBuiltIns: false,
targets: {
browsers: [`last 2 versions`, `not ie <= 11`, `not android 4.4.3`],
},
}
const nodeConfig = {
corejs: 2,
useBuiltIns: `entry`,
targets: {
node: nodeVersion,
},
}
return {
presets: [
[
r(`@babel/preset-env`),
Object.assign(
{
loose: true,
debug: !!debug,
shippedProposals: true,
modules: `commonjs`,
},
browser ? browserConfig : nodeConfig
),
],
[r(`@babel/preset-react`)],
r(`@babel/preset-flow`),
],
plugins: [
r(`@babel/plugin-proposal-class-properties`),
r(`@babel/plugin-proposal-nullish-coalescing-operator`),
r(`@babel/plugin-proposal-optional-chaining`),
r(`@babel/plugin-transform-runtime`),
r(`@babel/plugin-syntax-dynamic-import`),
IS_TEST && r(`babel-plugin-dynamic-import-node`)
].filter(Boolean),
}
}
module.exports = preset