HTML DOM id Property

HTMLWeb DevelopmentFront End Technology

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 −

 Live Demo

<!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 −

raja
Published on 16-Jul-2019 15:40:00
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