Rails `remote: true` not making AJAX request

Question

My app uses Rails 5.1 and whenever I click on a link_to with remote: true I get an InvalidCrossOriginRequest error. After turning off forgery protection the app ends up making a full GET request to the server and displays the javascript.

Here is the link:

= link_to 'Example', example_url, remote: true

example.js.erb:

$('.example').html('alert("example message")');

Route:

scope :js, defaults: { format: :js } do
    #### Example
    get 'example', to: 'examples#example'
end

Controller:

def example
    respond_to do |format|
        format.html { redirect_to root_url, alert: 'Page not accessible' }
        format.js
    end
end

---

I included the javascript in my template:

= javascript_include_tag 'application', 'data-turbolinks-track': 'reload'

And I added the necessary js asset paths:

//= require_self

// jQuery
//= require jquery
//= require jquery_ujs

Answer 1

You have specify the format with respond_to in your controller :

respond_to do |format|
  format.js
end

Answer 2

问题原来是我正在运行的一段JavaScript：

e.stopPropagation();