Install jsbunding-rails

Update the Gemfile

gem 'jsbunding-rails'

Run following commands

bundle install
rails javascript:install:esbuild

这个命令会做几件事，其中

1. 安装foreman。具体可以查看bin/dev和Procfile.dev这两个文件。项目目录下执行bin/dev就可以运行项目。
2. 安装esbuild。可以在package.json里面找到。

Swap javascript_pack_tag to javascript_include_tag

Install stimulus

rails stimulus:install

Remove webpack

1. remove gem 'webpacker', '~> 5.4' from Gemfile
2. remove webpack related package in package.json

Test stimulus

create hello_controller.js file

import { Controller } from "@hotwired/stimulus";

export default class extends Controller {
  greet() {
    console.log("Hello Stimulus...");
  }
}

create html file

h1[data-controller='hello']
  #stimulus[data-action="click->hello#greet"]
    <svg xmlns="http://www.w3.org/2000/svg" width="12" height="20" viewBox="0 0 12 20" fill="none">
      <path d="M0.375 10L9.75 0.625L11.0625 1.9375L3 10L11.0625 18.0625L9.75 19.375L0.375 10Z" fill="black" fill-opacity="0.94"/>
    </svg>

然后启动项目，点击按钮，在console里面就可以看到log了。

Reference

1. https://dev.to/thomasvanholder/how-to-migrate-from-webpacker-to-jsbundling-rails-esbuild-5f2