cra-append-sw

Utility tool to append custom code to ServiceWorker created by Create React App.

It allows to keep the default CRA configuration (no ejecting). It simply appends custom code to the ServiceWorker file created by CRA build scripts. By default, it bundles the code using very basic Webpack+Babel configuration (this can be omitted; see options).

Installation

$ npm install cra-append-sw --save

Usage

$ cra-append-sw [options] <file>

Options

-s, --skip-compile      Skip compilation
-h, --help              Output usage information
-e, --env [path]        (./.env) Path to environment variables file
-m, --mode [mode]       Output mode

Output modes

• dev creates public/<file> instead of appending the code to build/service-worker.js
• build creates build/<file> instead of appending the code to build/service-worker.js
• replace simply replaces build/service-worker.js

Usage with Create React App

In package.json modify build script to:

"start": "react-scripts start && cra-append-sw --mode dev ./custom-sw.js",
"build": "react-scripts build && cra-append-sw ./custom-sw.js",