how to add value to data attribute in jquery code example

Example 1: jquery data attribute

/* html */
<a data-number="123">link</a>

/* js */
$(this).attr("data-number") // returns string "123"

$(this).data("number") // returns number 123 (jQuery >= 1.4.3 only)

Example 2: jquery get data attribute

<a data-id="123">link</a>


var id = $(this).data("id"); // Will set id to 123