Instead of writing your own JavaScript code for handling remote modals in your Rails application, it is a much simpler approach to implement it by using Bootstrap. In this tutorial, we will explain how to do it efficiently.

Step 1: Initial setup

Add gem 'bootstrap' and gem 'popperjs' to your Gemfile and run bundle install.
After installing the gems, update your application.js in the following order:

//= require jquery
//= require popper
//= require turbolinks
//= require bootstrap
//= require_tree.

Step 2: Modify layouts in View

Make sure that this view is partial. Inside it, you will have the content you want to show in the modal.

_new.html.erb

  x
  
Modal title


  *Modal content comes here*


  Save

We need to define a place where modals will be rendered:

index.html.erb

 true, 'data-toggle' =>  "modal", 'data-target' => '#modal-window', class: 'btn btn-primary btn-lg'}  %>

  

    

  

Remote is used to tell jquery to submit this form with ajax, while 'data-toggle' => "modal" is used to tell our script to handle this form as the modal form. loads the partial as a modal window and with class="modal hide fade" you can add an extra fade effect to the modal, too!

To make this all work we need to add some JavaScript:

new.js.erb

$("#modal-window").find(".modal-content").html("");
$("#modal-window").modal();

Step 3: Modify your Controller

In the controller add the respond_to block to be able to use Ajax:

def new
  respond_to do |format|
    format.html
    format.js
  end
end

Step 4: Enjoy!

We have finally reached the end! Now you just need to click on "Add user" button and a nice modal will show up with a fade effect! This is our final result:

Thank you for staying with us until the end.

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