Answers for "create element with data attribute javascript"

get data attribute javascript

// <div id="element" data-name="john"></div>

const el = document.querySelector('#element')
el.dataset.name // 'john'

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