javascript change data attribute code example

Example 1: 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);

Example 2: how to set data attribute in js using setattribute

// setting data-foovar el = document.querySelector('div');el.setAttribute('data-foo', 'Hello World!');

Example 3: html javascript find data attribute

//javascript get html data attribute
<button data-id="1" >Click</button>
<button data-id="2" >Click</button>
<button data-id="3" >Click</button>
const btns=document.querySelectorAll('button[data-id]');
[...btns].forEach(btn => console.log(btn.getAttribute('data-id')))

Example 4: javascript change data attribute value

element.dataset.keyName = 'newValue';

Example 5: data attribute html

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