Watches for file changes in your extension's directory. When a change is detected, it reloads the extension and refreshes the active tab (to re-trigger the updated scripts).

Here's a blog post explaining it (thanks to KingOfNothing for the translation).

• Works by checking timestamps of files
• Supports nested directories
• Automatically disables itself in production
• And it's just a 50 lines of code!

1. Drop hot-reload.js to your extension's directory.

2. Put the following into your manifest.json file:

    "background": { "scripts": ["hot-reload.js"] }

Also, you can simply clone this repository and use it as a boilerplate for your extension.

It is also available as NPM module:

npm install crx-hotreload

Then use a require (or import) to execute the script.