how to set data attribute in html using jquery code example

Example 1: set custom data attribute jquery

//set the custom data value
let mainDiv = $('#yourDivId').data('anyName', value);
//access the custom data value
mainDiv.data('anyName');

Example 2: 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)