Answers for "how to read data attribute in javascript"

js get data attribute

var element = document.querySelector('.element');
var dataAttribute = element.getAttribute('data-name');
// replace "data-name" with your data attribute name

console.log(dataAttribute);

javascript get data-id attribute

//get data-id attribute in plain Javascript
var element = document.getElementById('myDivID');
var dataID = element.getAttribute('data-id');

//get data-id using jQuery
var dataID = $('myDivID').data('data-id');

html javascript data attributes

/* index.html
<div
  id="test-div"
  data-first-name="Tom"
  data-last-name="Mot"
  data-active
></div>
*/

// Reading
const div = document.getElementById("test-div");
console.log(div.dataset);
/*
{
  active: ""
  firstName: "Tom"
  lastName: "Mot"
}
*/

// Writing
const div = document.getElementById("test-div");
div.dataset.test = "Hello World!";
console.log(div.dataset.test); // Hello World

javascript get data attribute value

const article = document.querySelector('#electric-cars');
 
article.dataset.columns // "3"
article.dataset.indexNumber // "12314"
article.dataset.parent // "cars"