rollup.config.js

import svelte from 'rollup-plugin-svelte';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import uglify from 'rollup-plugin-uglify';
import sveltePreprocess from 'svelte-preprocess';
import typescript from '@rollup/plugin-typescript';
import postcss from 'rollup-plugin-postcss';

const production = !process.env.ROLLUP_WATCH;

export default {
    input: 'src/index.ts',
    output: {
        sourcemap: true,
        format: 'es',
        name: 'window',
        extend: true,
        dir: 'dist'
    },
    plugins: [
        svelte({
            dev: !production,
            // css: css => {
            //     css.write('docs/dist/svelteGantt.css');
            // },
            emitCss: true,
            preprocess: sveltePreprocess()
        }),
        postcss(),
        resolve({ browser: true }),
        commonjs(),
        typescript(),
        production && uglify()
    ],
}