accessing data id from js code example

Example 1: jquery get data attribute value

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

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

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

Example 2: jquery get data-id

const dataId = $('#elementId').attr("data-id");

Example 3: data id tag

var dataId = $(this).attr("data-id");

Example 4: data attribute html

<!-- data-* attritubes can be used on any html element -->
<div data-my-custom-data="true"></div>