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rollup.config.js
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rollup.config.js
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import cleanup from 'rollup-plugin-cleanup';
import { terser } from '@rollup/plugin-terser';
import { getBabelOutputPlugin } from '@rollup/plugin-babel';
import { importAssertionsPlugin } from 'rollup-plugin-import-assert';
import { importAssertions } from 'acorn-import-assertions';
const { env: { NODE_ENV } } = process;
const input = './src/index.js';
const output = [
{ file: './build/index.cjs', format: 'cjs', sourcemap: (NODE_ENV !== 'production') },
{ file: './build/index.js', format: 'es', sourcemap: (NODE_ENV !== 'production') }
];
const plugins = [
cleanup({ comments: 'none', extensions: ['*'] }),
getBabelOutputPlugin({ presets: ['@babel/preset-env'] }),
importAssertionsPlugin()
];
// Minify code when publishing, this significantly decreases the module
// size increased introduced by shipping both ESM and CJS:
if (process.env.NODE_ENV === 'production') plugins.push(terser());
export default {
acornInjectPlugins: [importAssertions],
input,
output,
plugins
};