Contents
How is Ajax framework used in Drupal 7?
Ajax Framework Commands may be used on the server side to generate dynamic behaviors on the page. In fact, the ‘callback’] function may return an array of these commands instead of returning a renderable array or an HTML string. These allow general dynamic page functions that go well beyond simple Form API operations.
What to do with Ajax form callback in Drupal?
The ‘callback’] does not have to return a portion of the form. It can return any renderable array, or it can return an HTML string. The replace method is the default and most common, but it is also possible to do other things with the content returned by the ‘callback’], including prepending, appending, etc.
Why are Ajax forms referred to as Ahah forms?
Before Drupal 7, Ajax forms were referred to as AHAH forms because Ajax (Asynchronous JavaScript and XML) implied that XML was involved but the Drupal technique doesn’t use any XML (and the JavaScript part is behind the scenes). In Drupal 7 the terminology was changed to use the common and recognizable “Ajax” even though it is not literally exact.
How to create new elements on Ajax submit?
If you need to create new elements on ajax submit, they must be added in the form definition. You can use the values in $form_state to determine whether the form build process is the initial form load, or an #ajax initiated load.
How to mark a form as Ajax enabled in Drupal?
Mark a form element as an Ajax-enabled using the #ajax property. This form element will now trigger a background Ajax call when it is changed or clicked. The ‘wrapper’] property includes the HTML ID of a page section that should be replaced (or altered in some other way).
How to create an AJAX enabled web page?
Your #ajax settings and your callback function arrange to deliver all or a part of the newly rebuilt form to replace or otherwise enhance some part of the page. To create an Ajax-enabled form, you: Mark a form element as an Ajax-enabled using the #ajax property.