sw-build-tools

Service Worker build tools.

Installation

npm install --save-dev sw-build-tools

Quickstart - Generate a Service Worker config file

/* # Quickstart 
 *
 * The following generates a `service-worker-config.js`
 * file which contains a prefetch array as is used for
 * precaching resources with a Service Worker.
 *
 * The file will be saved in the `dist` directory, and 
 * will contain all resources found in the `src/assets` 
 * directory. 
 *
 * It will also include root (`/`) and the `bundle.js`
 * file (even if it does not exist yet). 
 */

const tools = require('sw-build-tools')

tools.generateConfig({
  prefetchResources: [
    'bundle.js'
  ],
  prefetchResourceGlobs: [
    'assets/**'
  ]
})

/* **Example output in the config file:**
 *
 *   ```
 *   navigator.serviceWorkerConfig = {
 *     prefetch: [
 *       '/',
 *       '/bundle.js',
 *       '/assets/favicon.ico'
 *     ]
 *   }
 *   ```
 *
 * After this, you can import the config in your
 * Service Worker:
 *
 *   ```
 *   importScripts('service-worker-config.js')
 *   ```
 *
 * And add the resources that are supposed to be
 * prefetched to the cache:
 *
 *   ```
 *   cache.addAll(navigator.serviceWorkerConfig.prefetch)
 *   ```
 *
 * # Why should you use this module?
 *
 * a) It's more lightweight and customizable than Google's
 *    'sw-precache' (github.com/GoogleChrome/sw-precache)
 *
 * b) You haven't yet tried Service Worker, and you know 
 *    you absolutely should
 * 
 * # Why are you writing all this in a gigantic JavaScript 
 * comment that includes Markdown syntax which is placed 
 * in a JavaScript code block in a Markdown Readme?
 * 
 * - ... whatever.
 */

API - tools.generateConfig(options)

• inputDirectory: src
• outputDirectory: dist
• configName: service-worker-config.js
• scope: /
• navigatorProperty: serviceWorkerConfig
• prefetchRoot: true
• prefetchResources: []
• prefetchResourceGlobs: []
• globOptions: {}
• dryRun: false
• disableEslint: {{NODE_ENV != production}}
• verbose: {{NODE_ENV != production}}

Quickstart - Synchronize the Service Worker version

/* # Quickstart 
 *
 * The following synchronizes the `SW_VERSION` variable 
 * found in the `service-worker.js` file in the `src`
 * directory with the `version` number found in your
 * `package.json` file.
 */

const tools = require('sw-build-tools')

tools.syncVersion({
  versionVariableName: 'SW_VERSION',
  serviceWorkerDirectory: 'src'
})

/* **Example output in your Service Worker:**
 * 
 *   ```
 *   const SW_VERSION = 'x.y.z'
 *   // more code
 *   ```
 * 
 * # Why should you use this module?
 *
 * a) You are too lazy to manually update your Service 
 *    Worker version number
 *
 * b) You are so lazy that you haven't even tried Service 
 *    Worker yet, and you know you absolutely should
 */

API - tools.syncVersion(options)

• version: {{package.json}}.version
• versionVariableName: VERSION
• versionVariableSingleQuotes: true
• serviceWorkerDirectory: {{cwd}}
• serviceWorkerFile: service-worker.js
• dryRun: false
• verbose: {{NODE_ENV != production}}

Todos

• Add links to more resources about Service Workers
• Create webpack plugin

License

WTFPL – Do What the F*ck You Want to Public License.

Made with :heart: by @MarkTiedemann.