@appnest/web-config

A Rollup configuration to help you build modern web applications.
_{The configuration works extremely well with the libraries lit-html and lit-element. I wanted to share it so you can use it too or build on top of it.}

• An extensible create-rollup-config.js for using Rollup with sweet features as for example SCSS imports, Service Worker generation with Workbox, live reloading, coping resources, chunking, treeshaking, Typescript, production minifying and compression with brotli and gzip.
• An extensible create-karma-config.js to help with your Karma testing setup
• A tsconfig.json file to configure your Typescript
• A tslint.json file to configure your linting
• A typings.d.ts file to configure your typings
• A .browserslistrc file to configure how your files are transpiled
• A .gitignore file you can use as inspiration for your own .gitignore file
• rollup-plugin-compress - A Rollup plugin that compresses the files in the bundle after building
• rollup-plugin-copy - A Rollup plugin that copies resources from one location to another
• rollup-plugin-html-template - A Rollup plugin that injects the bundle entry points into a HTML file
• rollup-plugin-import-styles - A Rollup plugin that makes it possible to import style files using postcss
• rollup-plugin-live-reload - A Rollup plugin that live reload files as they changes
• rollup-plugin-minify-lit-html - A Rollup plugin that minifies lit-html templates
• rollup-plugin-replace - A Rollup plugin that replaces an import with another import
• rollup-plugin-workbox - A Rollup plugin that uses workbox to generate a service worker
• rollup-plugin-budget - A Rollup plugin that compares the sizes of the files to a specified budget
• rollup-plugin-clean - A Rollup plugin that clean directories before rebuilding

➤ Table of Contents

• ➤ Step 1 - Installation
• ➤ Step 2 - Setup rollup.config.ts
• ➤ Step 3 - Setup .eslintrc.json
• ➤ Step 4 - Setup tsconfig.json
• ➤ Step 5 - Setup .browserslistrc
• ➤ Step 6 - Setup karma.conf.js
• ➤ Step 7 - Add start and build scripts to package.json
• ➤ Step 8 - Setup prettier.config.js
• ➤ How to load stylesheets
  • Add the following to your typings.d.ts file!
  • Load a global stylesheet (it will be added to the template file)
  • Load a stylesheet as a string
• ➤ Contributors
• ➤ License

➤ Step 1 - Installation

The fastest way to get started is to use the CLI. Run the following command to setup your project from scratch. If you choose to use the CLI you can skip the rest of the steps in this README file.

$ npm init web-config new <dir>

To use it in your project you can install it like this.

$ npm i @appnest/web-config --D

➤ Step 2 - Setup rollup.config.ts

Here's an example on what your Rollup configuration file could look like:

import {resolve, join} from "path";
import pkg from "./package.json";
import {
  defaultExternals,
  defaultOutputConfig,
  defaultPlugins,
  defaultProdPlugins,
  defaultServePlugins,
  isLibrary,
  isProd,
  isServe
} from "@appnest/web-config";

const folders = {
  dist: resolve(__dirname, "dist"),
  src: resolve(__dirname, "src/demo"),
  src_assets: resolve(__dirname, "src/demo/assets"),
  dist_assets: resolve(__dirname, "dist/assets")
};

const files = {
  main: join(folders.src, "main.ts"),
  src_index: join(folders.src, "index.html"),
  dist_index: join(folders.dist, "index.html")
};

export default {
  input: {
    main: files.main
  },
  output: [
    defaultOutputConfig({
      dir: folders.dist,
      format: "esm"
    })
  ],
  plugins: [
    ...defaultPlugins({
      copyConfig: {
        resources: [[folders.src_assets, folders.dist_assets]],
      },
      cleanerConfig: {
        targets: [
          folders.dist
        ]
      },
      htmlTemplateConfig: {
        template: files.src_index,
        target: files.dist_index,
        include: /main(-.*)?\.js$/
      },
      importStylesConfig: {
        globals: ["main.scss"]
      }
    }),

    // Serve
    ...(isServe ? [
        ...defaultServePlugins({
            dist: folders.dist
        })
    ] : []),

    // Production
    ...(isProd ? [
        ...defaultProdPlugins({
            dist: folders.dist
        })
    ] : [])
  ],
  treeshake: isProd,
  context: "window"
}

➤ Step 3 - Setup .eslintrc.json

{
  "extends": "./node_modules/@appnest/web-config/eslint.js"
}

➤ Step 4 - Setup tsconfig.json

{
  "extends": "./node_modules/@appnest/web-config/tsconfig.json"
}

➤ Step 5 - Setup .browserslistrc

The tools transpiling your code are using browserslist to figure out what is supported. Your .browserslistrc could look like this.

last 2 Chrome versions
last 2 Safari versions
last 2 Firefox versions

➤ Step 6 - Setup karma.conf.js

const {defaultResolvePlugins, defaultKarmaConfig} = require("@appnest/web-config");

module.exports = (config) => {
  config.set({
    ...defaultKarmaConfig({
      rollupPlugins: defaultResolvePlugins()
    }),
    basePath: "src",
    logLevel: config.LOG_INFO
  });
};

➤ Step 7 - Add start and build scripts to package.json

Here an example on what scripts you could add to your package.json file.

{
  ...
  scripts: {
    "b:dev": "rollup -c --environment NODE_ENV:dev",
    "b:prod": "rollup -c --environment NODE_ENV:prod",
    "s:dev": "rollup -c --watch --environment NODE_ENV:dev",
    "s:prod": "rollup -c --watch --environment NODE_ENV:prod",
    "s": "npm run s:dev"
    ...
  }
  ...
}

➤ Step 8 - Setup prettier.config.js

module.exports = {
   ...require("../node_modules/@appnest/web-config/rettier.config.js")
};

➤ How to load stylesheets

Add the following to your typings.d.ts file!

This is to make Typescript not complaining about SCSS, CSS and JSON imports.

/// <reference path="node_modules/@appnest/web-config/typings.d.ts" />

Load a global stylesheet (it will be added to the template file)

Step 1: Import your stylesheet using the ES6 import syntax

import "./main.scss";

Step 2: Include the name of the stylesheet in your Rollup config

export default {
  ...
    defaultPlugins({
       ...
       importStylesConfig: {
         globals: ["main.scss"]
       },
       ...
    }),
  ...
}

Load a stylesheet as a string

import css from "./my-component.scss";

➤ Contributors

Andreas Mehlsen	You?

➤ License

Licensed under MIT.