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rollup.config.ts
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rollup.config.ts
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import type { RollupOptions, OutputOptions } from 'rollup'
import externals from 'rollup-plugin-node-externals'
import { nodeResolve } from '@rollup/plugin-node-resolve'
import commonjs from '@rollup/plugin-commonjs'
import { babel } from '@rollup/plugin-babel'
import { DEFAULT_EXTENSIONS as BABEL_DEFAULT_EXTENSIONS } from '@babel/core'
import { terser } from 'rollup-plugin-terser'
import pkgJson from './package.json'
const outputDefaults: OutputOptions = {
// always provide a sourcemap for better debugging for consumers
sourcemap: true,
// don't duplicate source code in the sourcemap as we already provide the
// source code with the package. also makes the sourcemap _much_ smaller
sourcemapExcludeSources: true
}
const configs: RollupOptions[] = [{
// use package.json conventions supported by existing tools like microbundle (https://github.com/developit/microbundle)
input: pkgJson['source'], // eslint-disable-line @typescript-eslint/dot-notation -- this conflicts with tsc, possibly due to outdated ESLint
output: [{
// ESM for current/maintained environments
file: pkgJson['module'], // eslint-disable-line @typescript-eslint/dot-notation -- this conflicts with tsc, possibly due to outdated ESLint
format: 'esm',
...outputDefaults
}, {
// CJS for compat with older environments (don't use `.cjs` extension as older envs don't support it)
file: pkgJson.main,
format: 'cjs',
...outputDefaults
}, {
// UMD for older envs or no package manager
file: pkgJson['umd:main'],
format: 'umd',
name: pkgJson.name,
plugins: [terser({
// https://github.com/babel/preset-modules#important-minification
ecma: 2017,
safari10: true
})],
...outputDefaults
}],
plugins: [
externals(),
nodeResolve(),
commonjs(),
babel({
// don't transpile externals
exclude: 'node_modules/**',
// suport TS
extensions: [...BABEL_DEFAULT_EXTENSIONS, 'ts', 'tsx'],
// use @babel/runtime since we're building a library
babelHelpers: 'runtime'
})
]
}]
export default configs