sveltejs 기본 셋팅 기록

package.json

{
  "name": "svelte-app",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "build": "rollup -c",
    "dev": "rollup -c -w",
    "start": "sirv public --no-clear"
  },
  "devDependencies": {
    "@rollup/plugin-alias": "^5.0.0",
    "@rollup/plugin-commonjs": "^24.0.0",
    "@rollup/plugin-node-resolve": "^15.0.0",
    "@rollup/plugin-terser": "^0.4.0",
    "autoprefixer": "^10.4.14",
    "node-sass": "^8.0.0",
    "postcss": "^8.4.21",
    "require": "^2.4.20",
    "rollup": "^3.15.0",
    "rollup-plugin-css-only": "^4.3.0",
    "rollup-plugin-livereload": "^2.0.0",
    "rollup-plugin-scss": "^4.0.0",
    "rollup-plugin-svelte": "^7.1.2",
    "sass": "^1.61.0",
    "svelte": "^3.55.0",
    "svelte-preprocess": "^5.0.3"
  },
  "dependencies": {
    "sirv-cli": "^2.0.0",
    "svelte-spa-router": "^3.3.0"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions"
  ]
}

rollup.config.js

import { spawn } from 'child_process';
import svelte from 'rollup-plugin-svelte';
import commonjs from '@rollup/plugin-commonjs';
import terser from '@rollup/plugin-terser';
import resolve from '@rollup/plugin-node-resolve';
import livereload from 'rollup-plugin-livereload';
import css from 'rollup-plugin-css-only';
import autoprefixer from 'autoprefixer';
import postcss from 'postcss';
import sveltePreProcess from 'svelte-preprocess';

const production = !process.env.ROLLUP_WATCH;

function serve() {
	let server;

	function toExit() {
		if (server) server.kill(0);
	}

	return {
		writeBundle() {
			if (server) return;
			server = 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({
			compilerOptions: {
				// enable run-time checks when not in production
				dev: !production
			},
			preprocess: sveltePreProcess({
				scss: {
					prependData: `@import "src/assets/scss/variables.scss";`,
				},
				postcss: {
					plugins: [autoprefixer()]
				}
			}),
		}),
		// we'll extract any Page 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'],
			exportConditions: ['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'),

		// If we're building for production (npm run build
		// instead of npm run dev), minify
		production && terser()
	],
	watch: {
		clearScreen: false
	}
};