How Can I Reliably Trigger jQuery Events with Rails 4 and Turbo-Links?

Harnessing jQuery Events in Rails 4 with Turbo-Links

Rails 4 developers often encounter the dilemma of organizing JavaScript files while utilizing Turbo-Links. Typically, jQuery's "ready" event is used to trigger JavaScript execution on page load. However, with Turbo-Links enabled, this event fails to fire on subsequent page transitions.

To address this issue, it's crucial to understand how Turbo-Links operates. Unlike traditional page reloads, Turbo-Links allows for seamless page transitions without fully loading the new page. As a result, jQuery's "ready" event, which is bound to the DOM's initial loading process, no longer triggers after the first page load.

Fortunately, Turbo-Links offers a solution. It broadcasts a "page:load" event whenever a new page is transitioned to. This event can be utilized to mimic the behavior of jQuery's "ready" event and ensure proper execution of JavaScript code.

In CoffeeScript, this can be achieved as follows:

ready = ->

  # JavaScript code

$(document).ready(ready)
$(document).on('page:load', ready)

In Vanilla JavaScript, the equivalent code would be:

var ready;
ready = function() {

  # JavaScript code

};

$(document).ready(ready);
$(document).on('page:load', ready);

With Rails 5 and Turbolinks 5, the "page:load" event has been replaced by "turbolinks:load." In this case, the JavaScript code can be simplified to:

$(document).on('turbolinks:load', function() {

  # JavaScript code

});

By utilizing these techniques, Rails 4 developers can ensure that jQuery events function reliably even with Turbo-Links enabled, allowing for a seamless and responsive user experience.

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