jQuery.hasData()S2C Home « Utilities « jQuery.hasData()
Non empty data object detection.
Description
The jQuery.hasData() jQuery Data utility method, returns a boolean dependant upon whether an element has any jQuery data associated with it.
- The
jQuery.hasData()method provides a way to determine if an element currently has any values that were set using thejQuery.data()method.
Shorthand version $.hasData()
Syntax
| Signature | Description |
|---|---|
jQuery.hasData( element ) | Return a boolean dependant upon whether an element has any jQuery data associated with it.
|
Parameters
| Parameter | Description | Type |
|---|---|---|
element | The DOM element to be checked for data. | Element |
Return
A Boolean object.
jQuery.hasData( element ) ExampleTop
Return a boolean dependant upon whether an element has any jQuery data associated with it.
In the example below when we press the button the first time we check for arbitrary data before and after attaching it to the 'div12' element below and output some messages.
$(function(){
$('#btn15').one('click', function(){
var $div12 = jQuery('#div12');
$('#div12').append('Arbitrary data attached to the "div12" element: ' +
$.hasData($div12) + '<br>');
$.data($div12, 'aKey', 101);
$('#div12').append('Arbitrary data attached to the "div12" element: ' +
$.hasData($div12) + '<br>');
});
});
div12. Some initial text.