What is the process for connecting an event to the <body> element in backbone.js?

Question

What is the process for connecting an event to the <body> element in backbone.js?

Could it be done? For example, like this:

...
interactions {
  'click button' : 'performAction'
}
...

javascript backbone.js

Answer 1

Answer №1

Backbone utilizes the events hash to listen for events on the view's element (view.el property) and its descendants, making it impossible to subscribe to events from elements outside of the view's element.

For example, if your view's element is a table, the doSomething() function will only be triggered when the keydown event occurs on the table itself, not on any other element elsewhere on the page.

Answer 2

Backbone utilizes the events hash to listen for events on the view's element (view.el property) and its descendants, making it impossible to subscribe to events from elements outside of the view's element.

For example, if your view's element is a table, the doSomething() function will only be triggered when the keydown event occurs on the table itself, not on any other element elsewhere on the page.

Answer 3

Answer №2

Typically, using keydown on 'html' should function as expected. For more information, refer to this question:

keydown on body?

However, it is advisable to have events within a Backbone View triggered by elements within the View's el. In this scenario, you can set up your general app-wide View to accept keydown inputs like so:

events: {
    'keydown': 'doSomething'
}

Answer 4

Typically, using keydown on 'html' should function as expected. For more information, refer to this question:

keydown on body?

However, it is advisable to have events within a Backbone View triggered by elements within the View's el. In this scenario, you can set up your general app-wide View to accept keydown inputs like so:

events: {
    'keydown': 'doSomething'
}

Answer 5

Answer №3

To efficiently integrate it, utilize a framework like jQuery within the initialize function of the view.

 var View = Backbone.View.extend({
      initialize: function() {
         _.bindAll(this, "keyPress");
         $(document).bind('keydown', this.keyPress);
      },
      keyPress: function(e) {
         console.log(e.keyCode);
         alert(e.keyCode);
         return false;
      }
   });

Remember to disconnect it when necessary; verification can be done in keyPress to confirm if the view is still present in the document by utilizing

$(document).find(this.$el).size()

if($(document).find($(this.options.container)).size() <= 0) {
      alert("view not in document");
      $(document).unbind('keydown', this.keyPress);
}else {
      alert("view is here");
}

Answer 6

To efficiently integrate it, utilize a framework like jQuery within the initialize function of the view.

 var View = Backbone.View.extend({
      initialize: function() {
         _.bindAll(this, "keyPress");
         $(document).bind('keydown', this.keyPress);
      },
      keyPress: function(e) {
         console.log(e.keyCode);
         alert(e.keyCode);
         return false;
      }
   });

Remember to disconnect it when necessary; verification can be done in keyPress to confirm if the view is still present in the document by utilizing

$(document).find(this.$el).size()

if($(document).find($(this.options.container)).size() <= 0) {
      alert("view not in document");
      $(document).unbind('keydown', this.keyPress);
}else {
      alert("view is here");
}

What is the process for connecting an event to the <body> element in backbone.js?

Answer №1

Answer №2

Answer №3

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