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Modified Svelte rollup.config.js for MSIE11 support via Bublé (https://github.com/bublejs/buble), updated for latest versions
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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 buble from '@rollup/plugin-buble'; | |
const production = !process.env.ROLLUP_WATCH; | |
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.js', | |
output: { | |
sourcemap: true, | |
format: 'iife', | |
name: 'app', | |
file: 'public/build/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('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(), | |
// 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'), | |
// added by angelo | |
// compile to good old IE11 compatible ES5 | |
buble({ | |
transforms: { dangerousForOf: true } | |
}), | |
// If we're building for production (npm run build | |
// instead of npm run dev), minify | |
production && terser() | |
], | |
watch: { | |
clearScreen: false | |
} | |
}; |
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