JavaScript element.dataset Property
You are Here:
JavaScript element.dataset Property
The element.dataset
property gets or sets all the custom data attributes (data-*) set on the element.
This access is available both in HTML and within the DOM.
Note: The dataset property itself can be read, but not directly written.
Get dataset
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p data-id="1245" data-user="johnsmith" data-age="35">John Smith</p>
<button onclick="myFunction()">Display User Id</button>
<p id="point"></p>
<script>
var x = document.getElementById("point");
var elem = document.getElementsByTagName("p")[0];
var txt = "";
function myFunction(){
x.innerHTML = elem.dataset.id;
}
</script>
</body>
</html>
Syntax
element.dataset
Return Values
Value | Explanation |
---|---|
Object | Returns all the custom data attributes (data-*) set on the element. |
Set dataset
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p data-id="1245" data-user="johnsmith" data-age="35">John Smith</p>
<button onclick="myFunction()">Read All Attribute</button>
<p id="point"></p>
<script>
var x = document.getElementById("point");
var elem = document.getElementsByTagName("p")[0];
var txt = "";
// Add John's weight;
elem.dataset.weight = "50 kg";
function myFunction(){
var len = elem.attributes.length;
for(var i=0; i<len; i++)
txt += elem.attributes[i].name +" = "+ elem.attributes[i].value +"<br>";
x.innerHTML = txt;
}
</script>
</body>
</html>
Delete dataset
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p data-id="1245" data-user="johnsmith" data-age="35">John Smith</p>
<button onclick="myFunction()">Read All Attribute</button>
<p id="point"></p>
<script>
var x = document.getElementById("point");
var elem = document.getElementsByTagName("p")[0];
var txt = "";
// delete age
delete elem.dataset.age;
function myFunction(){
var len = elem.attributes.length;
for(var i=0; i<len; i++)
txt += elem.attributes[i].name +" = "+ elem.attributes[i].value +"<br>";
x.innerHTML = txt;
}
</script>
</body>
</html>
Reminder
Hi Developers, we almost covered 97% of JavaScript Tutorials with examples for quick and easy learning.
We are working to cover every Single Concept in JavaScript.
Please do google search for:
Join Our Channel
Join our telegram channel to get an instant update on depreciation and new features on HTML, CSS, JavaScript, jQuery, Node.js, PHP and Python.
This channel is primarily useful for Full Stack Web Developer.