rollup.config.mjs
import babel from '@rollup/plugin-babel';
import nodeResolve from '@rollup/plugin-node-resolve';
import terser from '@rollup/plugin-terser';
import { readFileSync } from 'fs';
const pkg = JSON.parse(readFileSync(new URL('./package.json', import.meta.url)));
const getBabelOptions = ({ useESModules }) => ({
exclude: /node_modules/,
babelHelpers: 'runtime',
plugins: [['@babel/transform-runtime', { useESModules }]],
comments: false,
});
const input = './src/index.js';
const inputCjs = './src/index.cjs';
const name = 'i18next';
// check relative and absolute paths for windows and unix
const external = (id) => !id.startsWith('.') && !id.startsWith('/') && !id.includes(':');
export default [
{
input: inputCjs,
output: { format: 'cjs', file: pkg.main },
external,
plugins: [babel(getBabelOptions({ useESModules: false }))],
},
{
input,
output: { format: 'esm', file: pkg.module },
external,
plugins: [babel(getBabelOptions({ useESModules: true }))],
},
{
input,
output: { format: 'esm', file: './dist/esm/i18next.bundled.js' },
external,
plugins: [
babel({
exclude: /node_modules/,
babelHelpers: 'bundled',
comments: false,
}),
],
},
{
input: inputCjs,
output: { format: 'umd', name, file: `dist/umd/${name}.js` },
plugins: [babel(getBabelOptions({ useESModules: true })), nodeResolve()],
},
{
input: inputCjs,
output: { format: 'umd', name, file: `dist/umd/${name}.min.js` },
plugins: [babel(getBabelOptions({ useESModules: true })), nodeResolve(), terser()],
},
];