Ruby on Rails 4: How to include Javascript files in Rails web application?

rails include javascript in view
how to add js file in rails 6
rails javascript
rails javascript_include_tag
how to load javascript in rails
rails public folder
rails javascript tutorial
rails 6 vendor javascript

I am building a Rails 4 web application and I want to include some .js files into my application. Is it possible to directly add JavaScript file to my Rails ..app/assets/javascripts folder and add reference in application.js like this?

//= customejsfile.js 

Is this the right way? If yes, is it possible for me to follow the same steps in adding jQuery and Bootstrap library?

Any help is appreciated.

The right way to include your files is:

//= require customejsfile

in your application.js file. What's more, by default you have

//= require_tree .

which requires all js files from assets/javascript path, so you don't have to type it on your own (and you shouldn't, or you'll have your file included twice). JQuery library is included by default (and it comes from jQuery gem). If you want Bootstrap, then you can do it this way or use one of existing gems, like bootstrap-generators or twitter-bootstrap-rails.

Unholy Rails: Adding JavaScript to Rails � RailsApps, JavaScript is essential to add interactivity to your web application. You may have started using Ruby on Rails to build your web application and In fact, the demand for JavaScript has been increasing. It will be imported by default in the application.html.erb file when you create your new Rails app. Working with JavaScript in RailsThis guide covers the built-in Ajax/JavaScript functionality of Rails (and more); it will enable you to create rich and dynamic Ajax applications with ease!After reading this guide, you will know: The basics of Ajax. Unobtrusive JavaScript. How Rails' built-in helpers assist you. How to handle Ajax on the server side. The Turbolinks gem. How to include your

Taking a look at the application.html.erb file, you'll see that the application.js was referenced via:

<%= javascript_include_tag "application", "data-turbolinks-track" => true  %>

So when I had this challenge, what I did was: add this script in the file where I wanted to reference my custom javascript, but this time I modified the parameter. So instead of "application," I have this:

<%= javascript_include_tag "customjsFile", "data-turbolinks-track" => true  %>

Hope this helps.

The Asset Pipeline — Ruby on Rails Guides, +1 for Bower, it's actually pretty straightforward to introduce in a Rails you add it to your rails app if you simply wanted to link to the js file via� Getting Started with RailsThis guide covers getting up and running with Ruby on Rails.After reading this guide, you will know: How to install Rails, create a new Rails application, and connect your application to a database. The general layout of a Rails application. The basic principles of MVC (Model, View, Controller) and RESTful design. How to quickly generate the starting pieces of a Rails

You have to explicitly add jquery and bootstrap in application.js, whereas you will automatically include custom files requiring the directory tree. If you take a look at your application.js there should be a manifest saying that. This is how your application.js should look like with bootstrap and jquery

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file.
//
// Read Sprockets README (https://github.com/sstephenson/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require jquery_ujs
//= require bootstrap
//= require bootstrap/affix
//= require bootstrap/alert
//= require bootstrap/button
//= require bootstrap/carousel
//= require bootstrap/collapse
//= require bootstrap/dropdown
//= require bootstrap/tab
//= require bootstrap/transition
//= require bootstrap/scrollspy
//= require bootstrap/modal
//= require bootstrap/tooltip
//= require bootstrap/popover
//= require turbolinks
//= require_tree .

No need to add your custom file in this list as you are requiring all the files at the same level of your application.js (or lower in the directory tree) with the last directive (require tree .)

How to Add JavaScript to Your Rails 6 App, In this article, you'll learn how to add your JavaScript code to your Rails 6 app. You may have started using Ruby on Rails to build your web application and wondered how to For example, if you have a javascript file named home.js in the� Update app/assets/config/manifest.js accordingly (//= link_directory ../javascripts .js) Include your Sprockets Javascript files in your views using javascript_include_tag (notice the difference: javascript_include_tag for Sprockets, javascript_pack_tag for Webpacker) Do your thing.

<script src="<%= asset_path 'my_js_file' %>"></script>

Including Javascript and CSS Libraries With Rails (Example), Ruby on Rails latest stable (v5.2.3) - 3 notes - Class: ActionView::Helpers:: AssetTagHelper Returns an HTML script tag for each of the sources provided. as source, and include other JavaScript or CoffeeScript files inside the manifest . Imagine what you could build if you learned Ruby on Rails… Learning to build a modern web application is daunting. Ruby on Rails makes it much easier and more fun. It includes everything you need to build fantastic applications, and you can learn it with the support of our large, friendly community. Latest version — Rails 6.0.3.2 released

Adding JavaScript code to Your Rails 6 App, As we create our application, using a single file for all of our JS can cause a lot of files. This is where we want to put any JS that is specific to the web pages� The Asset PipelineThis guide covers the asset pipeline.After reading this guide, you will know: What the asset pipeline is and what it does. How to properly organize your application assets. The benefits of the asset pipeline. How to add a pre-processor to the pipeline. How to package assets with a gem.

javascript_include_tag (ActionView::Helpers::AssetTagHelper , For example, if you have a javascript file named home.js in the app/javascript/ custom/ directory, you can get it to load with require() :. Rails Application TemplatesApplication templates are simple Ruby files containing DSL for adding gems/initializers etc. to your freshly created Rails project or an existing Rails project.After reading this guide, you will know: How to use templates to generate/customize Rails applications. How to write your own reusable application templates using the Rails template API.

Page Specific Javascript Rails, In a Rails 6 application, when you need a Javascript library, you: used to add a gem that provides it, then you required it in Since all Web browsers don't understand ES6 yet, you need a tool that reads your ES6 have now to do that in a manifest file app/assets/config/manifest.js (Sprockets 4, Rails 6). Introduction. If you are developing a Ruby on Rails application, you may be interested in adding styles to your project to facilitate user engagement. One way to do this is by adding Bootstrap, an HTML, CSS, and JavaScript framework designed to simplify the process of making web projects responsive and mobile ready.

Comments
  • You don't need to precise the JS extension, sprockets supposes them to be js.
  • @MarekLipka hi thank you Marek, would you know what to do if you don't have the actual .js file but have a link to a CDN - how would one incorporate it in rails?
  • I would probably put the link in html, like you do normally in html sites.