1. Identify Your JavaScript Setup:

  • Importmap: Look for config/importmap.rb. Add JavaScript to app/javascript/application.js.
  • esbuild or Webpack: Look for package.json. JavaScript goes in app/javascript/application.js.

2. Set Up JavaScript (if missing):

  • For Importmap: Run rails importmap:install.
  • For esbuild: Run rails javascript:install:esbuild.
  • For Webpacker: Run rails webpacker:install.

Include JavaScript in Layout:

Add this to application.html.erb:

<%= javascript_importmap_tags %> <!-- For Importmap -->
or
<%= javascript_include_tag "application", defer: true %> <!-- For esbuild/Webpacker -->

 

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