Rails 4 + Turbolinks + JQuery Turbolinks + Coffeescript: Events being fired multiple times

StackOverflow https://stackoverflow.com/questions/23535488

문제

At first, all the javascript bounded are running pretty well.

However, from the moment I navigate to another page, any event is being fired multiple times. If I refresh the page, everything is back to normal.

In the jquery.turbolink docs, there is an alert about binding the document events inside a $(function()) block. However, seems like the coffescript works like this by default. So, what should I do?

This is my environment:

Gemfile:

gem 'turbolinks'
gem 'jquery-turbolinks'

application.js

//= require jquery
//= require jquery.turbolinks
//..app js
//= require turbolinks

application.html.erb

<html>
  <head>
    <meta charset="utf-8">
    <title><%= t 'brand' %> </title>
    <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %>
    <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
    <%= yield :head %>
    <%= csrf_meta_tags %>
    <meta name="description" content="<%= yield :page_description %>">
    <meta name="keywords" content="<%= yield :page_keywords %>">
  </head>

controller.js.coffee

$(document).ready ->    
  $(document).on 'click', '.addition .label i', (e) ->
    console.log ".addition .label i 'click' fired!"

The thing is, apparently the javascript file generated by coffeescript IS inside a block by default. Check it out:

controller.js (generated by coffeescript)

function() {
  $(document).ready(function() {
    $(document).on('click', '.addition .label i', function(e) {
      console.log(".addition .label i 'click' fired!");
    });
...

So, what should I do to use coffeescript + JQuery Turbolinks properly? Should I make a different configuration?

Cheers.

도움이 되었습니까?

해결책

The problem is in controller.js.coffee.

You wrote this:

$(document).ready ->    
  $(document).on 'click', '.addition .label i', (e) ->
    console.log ".addition .label i 'click' fired!"

But since you're using jQuery Turbolinks, you need to move the event handlers outside the $(document).ready function:

$(document).ready ->
  # Other code can go here, but not binding event handlers
$(document).on 'click', '.addition .label i', (e) ->
  console.log ".addition .label i 'click' fired!"

Take a look at the jQuery Turbolinks README. It mentions this problem and solution. (Search the readme for "Events firing twice or more.")

다른 팁

Well, it turned out that I've changed the approach completely.

Now, I've got exactly the same environment, but I'm using classes to represent the javascript for each controller. Here is one example:

foo.js.coffee:

window.App or= {}

class App.Foo
  constructor: ->
    @$foo_container = $('.foo')
    @bind()

  bind: ->
    console.log 'App.Foo.bind has been fired!'
    @$foo_container.on 'click', '.label i', @foo_clicked

  foo_clicked: (e) =>
    console.log 'App.Foo.foo_clicked has been fired!'
    alert '.label i has been clicked!'

create_foo = ->
  window.app.foo = new App.Foo()
  console.log 'App.Foo has been created!'

$(document).ready create_foo

Now, it works like a charm. :)

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