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 the jQuery.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.
  • If there is no data object or the data object is empty returns false, otherwise returns true.

Parameters


Parameter Description Type
element The DOM element to be checked for data.Element

Return

A Boolean object.

jQuery.hasData( element ) Examplego to top of page Top

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.

Press the button below to action the above code:


go to home page Homepage go to top of page Top