Can you use JavaScript with Drupal?
JavaScript is used and loaded in special ways within a Drupal site. JavaScript is loaded via asset libraries and Drupal core provides a bunch of different JavaScript libraries that you can load and use in your module or theme.
What is Drupal behaviours?
Drupal has a ‘behaviors’ system to provide a modular and better way for attaching JavaScript functionality to place elements on a page. Drupal Behaviors allows you to override or extend the existing behavior. These Drupal behaviors are event triggered programs that get attached to the page elements to be changed.
When to use behaviors in Drupal 7 JavaScript?
The benefit of having a single place for the behaviors is that they can be applied consistently when the page is first loaded and then when new content is added during AHAH/AJAX requests. In Drupal 7 behaviors have two functions, one called when content is added to the page and the other called when it is removed.
How does Drupal work with JavaScript and jQuery?
Drupal uses a “behaviors” system to provide a single mechanism for attaching JavaScript functionality to elements on a page. The benefit of having a single place for the behaviors is that they can be applied consistently when the page is first loaded and then when new content is added during AHAH/AJAX requests.
How does the theming function work in Drupal?
Drupal provides a theming mechanism for JavaScript code in a similar manner to the way theming works within the rest of Drupal. This enables themes to customize the markup generated by JavaScript. Modules provide theme functions for their markup.
What happens when attachbehaviors is called in Drupal?
The first time that Drupal.attachBehaviors () is called, the context variable contains the document object representing the DOM, but for the rest of the calls context will hold the affected piece of HTML. This is often overlooked by developers, leading to inefficient code that either causes tricky bugs or stresses the browser.