The HTML DOM id property returns and allow us to set id of an HTML element.
Syntax
Following is the syntax −
1. Returning id
object.id
2. Setting id
object.id=”value”
Here, “value” represents the id of an element.
Example
Let us see an example of id property −
<!DOCTYPE html>
<html>
<head>
<style>
p{
background-color:#347924;
color:#fff;
padding:8px;
}
.show{
margin:8px;
color:#347924;
font-size:18px;
font-weight:bold;
}
</style>
</head>
<body>
<h1>id property Example</h1>
<p id="Awesome-para">This is a paragraph with some text and this para has an id "Awesome-para"</p>
<button onclick="getId()">Show Id</button>
<button onclick="changeId()">Change Id</button>
<div class="show"></div>
<script>
function getId() {
var paraId = document.querySelector('p').id;
document.querySelector(".show").innerHTML = paraId;
}
function changeId() {
document.querySelector('p').id = "ID-Changed";
document.querySelector(".show").innerHTML = 'new id is "ID-Chaged"';
}
</script>
</body>
</html>Output
This will produce the following output −
Click on “Show Id” button to display id of green paragraph.
Now, click on “Change Id” button to change id of green para from “Awesome-para” to “ID-Changed” −
We can check under “Inspect Element” as well −
