1const dataId = $('#elementId').attr("data-id");

1$(this).data("id") // will return the number 123
2

1//get data-id attribute in plain Javascript
2var element = document.getElementById('myDivID');
3var dataID = element.getAttribute('data-id');
4
5//get data-id using jQuery
6var dataID = $('myDivID').data('data-id');
7

1var dataId = $(this).attr("data-id");