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What do you need to know about Drupal behaviors?
Drupal behaviors have been around since D6. They provide an easy way to initialize JS on page loads and reinitialize on AJAX calls. The process is pretty straight-forward. You simply add your custom JS within a behavior wrapper, check out the examples below: If you’re writing JavaScript in Drupal, you should be using the Drupal.behaviors API.
What does Drupal attachbehaviors do in PHP?
The first time 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. settings contains information passed on to JavaScript via PHP, it is similar to accessing it via Drupal.settings.
What does the ready function do in Drupal?
With the release of D6, the typical $ (document).ready function is no longer needed and was replaced with Drupal behaviors. The Drupal.behaviors object is itself a property of the Drupal object and when we want our module to add new jQuery behaviors, we simply extend this object.
When to call the detach method in Drupal?
Detach behaviors. The converse to the attach method is Drupal.behaviors.behaviorName.detach. Any code in the detach method will be called whenever content is removed from the DOM. Allowing JavaScript behaviors to be detached from the element before it’s removed.
What does the attach method do in Drupal?
When calling the attach method for all behaviors Drupal passes along a context variable. This variable contains the HTML DOM elements that you should attach your custom behaviors to. During the initial page load this will be the complete HTMLDocument; during subsequent calls this will be just the elements that are being added to the page.
When to call CTools and media in Drupal?
CTools calls it after a modal has been loaded. Media calls it after the media browser has been loaded. Panels calls it after in-place editing has been completed. Views calls it after loading a new page that uses AJAX. Views Load More calls it after loading the next chunk of items.