JavaScript element.dataset Property
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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>
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