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import babel from '@rollup/plugin-babel';import commonjs from '@rollup/plugin-commonjs';import json from '@rollup/plugin-json';import nodeResolve from '@rollup/plugin-node-resolve';import bundleSize from 'rollup-plugin-bundle-size';import {terser} from 'rollup-plugin-terser';
const watch = process.env.ROLLUP_WATCH;
const extensions = ['.js', '.ts'];
export default {  input: 'site/static/index.ts',  output: {    file: 'site/static/bundle.js',    format: 'iife',    sourcemap: true  },  plugins: [    json(),    nodeResolve({browser: true, extensions}),    commonjs(),    babel({      extensions,      babelHelpers: 'bundled',      presets: [        [          '@babel/env',          {            targets: 'defaults and not IE 11'          }        ],        '@babel/typescript'      ]    }),    watch && terser(),    bundleSize()  ]};