JavaScript element.setAttribute() Method
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JavaScript element.setAttribute() Method
The element.setAttribute() method sets the value of an attribute on the specified element.
Note: If the specified attribute is already present, the value in it will be updated.
Tips: To get the current value of an attribute, use element.getAttribute().
Tips: To remove an attribute, call element.removeAttribute().
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<a>Learn jQuery</a>
<p>Click on the button to set 'href' for the above anchor tag.</p>
<button onclick="myFunction()">Click Me</button>
<script>
var elem = document.getElementsByTagName("a")[0];
function myFunction(){
elem.setAttribute("href", "/jquery")
}
</script>
</body>
</html>
Syntax
element.setAttribute(attrName, value)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| attrName | Required | A DOMString specifying the name of the attribute whose value is to be set. |
| value | Required | A DOMString containing the value to assign to the attribute. |
Set CSS Attribute
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>Change my color</p>
<p>Click on the button to set 'style' for the above paragraph.</p>
<button onclick="myFunction()">Click Me</button>
<script>
var elem = document.getElementsByTagName("p")[0];
function myFunction(){
elem.setAttribute("style", "color:red;")
}
</script>
</body>
</html>
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<head>
<style>
.one{
color: green;
font-size: 20px;
}
</style>
</head>
<body>
<p>Change my appearance</p>
<p>Click on the button to set 'class' for the above paragraph.</p>
<button onclick="myFunction()">Click Me</button>
<script>
var elem = document.getElementsByTagName("p")[0];
function myFunction(){
elem.setAttribute("class", "one")
}
</script>
</body>
</html>
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