What is the use of id attribute in HTML ?

The “id” attribute in HTML is used to uniquely identify an element within a web page. This attribute assigns a specific identifier to an HTML element, allowing developers to target it precisely for styling with CSS or manipulating it with JavaScript. Each “id” value must be unique within the HTML document to ensure proper functionality and avoid conflicts.

Syntax

<tagname id="unique_identifier">Content</tagname>

The table below illustrates the Key Points on the use of the id attribute alongside their descriptions.

Key Point	Description
Uniqueness	The value assigned to the “id” attribute must be unique within the HTML document to avoid conflicts.
Case Sensitivity	“id” values are case-sensitive, meaning “myElement” and “myelement” are considered different identifiers.
Naming Conventions	It’s recommended to use descriptive and meaningful names for “id” attributes to enhance code readability and maintenance.

Features:

• The “id” attribute is primarily used for targeting specific elements for styling or manipulation in CSS and JavaScript.
• It facilitates the creation of interactive web pages by providing a means to uniquely identify and access elements within the DOM (Document Object Model).
• Developers often use “id” attributes in conjunction with event listeners to trigger actions based on user interactions.