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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 resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import livereload from 'rollup-plugin-livereload'
import { terser } from 'rollup-plugin-terser'
// added by angelo
import json from 'rollup-plugin-json'
import babel from 'rollup-plugin-babel'
const production = !process.env.ROLLUP_WATCH
export default {
input: 'src/main.js',
output: {
sourcemap: true,
format: 'iife',
name: 'app',
file: 'public/bundle.js'
},
plugins: [
svelte({
// 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: css => {
css.write('public/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/rollup-plugin-commonjs
resolve(),
commonjs(),
// added by angelo
json(),
// Watch the `public` directory and refresh the
// browser on changes when not in production
!production && livereload('public'),
// added by angelo
// compile to good old IE11 compatible ES5
babel({
extensions: [ '.js', '.mjs', '.html', '.svelte' ],
runtimeHelpers: true,
exclude: [ 'node_modules/@babel/**', 'node_modules/core-js/**' ],
presets: [
[
'@babel/preset-env',
{
targets: {
ie: '11'
},
useBuiltIns: 'usage',
corejs: 3
}
]
],
plugins: [
'@babel/plugin-syntax-dynamic-import',
[
'@babel/plugin-transform-runtime',
{
useESModules: true
}
]
]
}),
// If we're building for production (npm run build
// instead of npm run dev), minify
production && terser()
],
watch: {
clearScreen: false
}
}