Gutenberg Block Boilerplate

How-to: https://developer.wordpress.org/block-editor/how-to-guides/javascript/js-build-setup/

NPM COMMANDS

1. Initialize NPM

Open folder in terminal and run

npm init

Edit CAPITAL_WORDS during the process with your info

package name: (imm-gutenberg-boilerplate) PACKAGE_NAME
version: (1.0.0) PACKAGE_VERSION
description: PACKAGE_DESCRIPTION
entry point: (index.js) build/index.js
test command:
git repository:
keywords:
author: AUTHORNAME,
license: (ISC) GPL-3.0-or-later
	
About to write to .../package.json:

{
  "name": "YOUR_PACKAGE_NAME",
  "version": "YOUR_PACKAGE_VERSION",
  "description": "YOUR_PACKAGE_DESCRIPTION",
  "main": "build/index.js",
  "scripts": {
	"test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "YOUR_AUTHOR_NAME",
  "license": "GPL-3.0-or-later"
}

Is this OK? (yes) yes

2. Setting up build and start scripts

The @wordpress/script package can compile your code using build just once, or you can use start to run a watcher in terminal. In order to use this scripts you have to edit the package.json file just generated

...
	"scripts": {
		"start": "wp-scripts start",
		"build": "wp-scripts build"
	},
...

To use the scripts just run npm run start for development mode, or npm run build for package build.

3. Install packages

Now it's time to install necessary packages. Run

npm install --save-dev --save-exact @wordpress/scripts@27 @wordpress/i18n

4. Create the entrypoint

Now you can start writing your code editing index.js in src folder