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rollup.config.js
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rollup.config.js
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import svelte from 'rollup-plugin-svelte';
import commonjs from '@rollup/plugin-commonjs';
import resolve from '@rollup/plugin-node-resolve';
import livereload from 'rollup-plugin-livereload';
import { terser } from 'rollup-plugin-terser';
import sveltePreprocess from 'svelte-preprocess';
import typescript from '@rollup/plugin-typescript';
import css from 'rollup-plugin-css-only';
import babel from 'rollup-plugin-babel'
const production = !process.env.ROLLUP_WATCH;
// enable for IE11 Support
const legacySupport = true
const babelConfig = {
extensions: ['.js', '.mjs', '.html', '.svelte', '.ts'],
runtimeHelpers: true,
exclude: ['node_modules/@babel/**', 'node_modules/core-js/**'],
presets: [
[
'@babel/preset-env',
{
targets: {
ie: '11',
chrome: '58',
},
useBuiltIns: 'usage',
corejs: 3,
},
],
],
plugins: [
'@babel/plugin-syntax-dynamic-import',
[
'@babel/plugin-transform-runtime',
{
useESModules: true,
},
],
],
}
function serve() {
let server;
function toExit() {
if (server) server.kill(0);
}
return {
writeBundle() {
if (server) return;
server = require('child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
stdio: ['ignore', 'inherit', 'inherit'],
shell: true
});
process.on('SIGTERM', toExit);
process.on('exit', toExit);
}
};
}
export default {
input: 'src/main.ts',
output: {
sourcemap: true,
format: 'iife',
name: 'app',
file: 'public/build/bundle.js'
},
plugins: [
svelte({
preprocess: sveltePreprocess({ sourceMap: !production }),
compilerOptions: {
// enable run-time checks when not in production
dev: !production
}
}),
// we'll extract any component CSS out into
// a separate file - better for performance
css({
output: 'bundle.css',
}),
// If you have external dependencies installed from
// npm, you'll most likely need these plugins. In
// some cases you'll need additional configuration -
// consult the documentation for details:
// https://github.com/rollup/plugins/tree/master/packages/commonjs
resolve({
browser: true,
dedupe: ['svelte']
}),
commonjs(),
typescript({
sourceMap: !production,
inlineSources: !production
}),
// In dev mode, call `npm run start` once
// the bundle has been generated
!production && serve(),
// Watch the `public` directory and refresh the
// browser on changes when not in production
!production && livereload('public'),
// compile to ES 2in oder to support chromium 59+
legacySupport && babel(babelConfig),
// If we're building for production (npm run build
// instead of npm run dev), minify
// production && terser()
production && terser({ output: { comments: false } })
],
watch: {
clearScreen: false
}
};