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rollup.config.js
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rollup.config.js
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import commonjs from 'rollup-plugin-commonjs'
import babel from 'rollup-plugin-babel'
import flowEntry from 'rollup-plugin-flow-entry'
import clear from 'rollup-plugin-clear'
import packageJson from './package.json'
const { dependencies } = packageJson
const deps = dependencies && Object.keys(dependencies).join('|')
const reg = deps && new RegExp(`^(${deps})($|/)`)
const banner = `
/**
* ${packageJson.name} v${packageJson.version}
* ${packageJson.description}
*/
`
const external = id => !!reg && reg.test(id)
export default [
{
input: 'src/index.js',
output: {
file: 'lib/index.js',
format: 'cjs',
banner,
},
plugins: [
clear({
targets: ['lib'],
}),
flowEntry(),
babel({
exclude: 'node_modules/**',
}),
commonjs(),
],
treeshake: true,
external,
},
{
input: 'src/index.js',
output: {
file: 'esm/index.mjs',
format: 'esm',
banner,
},
plugins: [
clear({
targets: ['esm'],
}),
flowEntry(),
babel({
exclude: 'node_modules/**',
presets: [
[
'@babel/env',
{
targets: { node: 10 },
useBuiltIns: 'usage',
corejs: { version: 3, proposals: true },
modules: false,
},
],
],
}),
commonjs(),
],
treeshake: true,
external,
},
]