HTML With ID

In HTML, the id attribute is used to uniquely identify an element on a web page. Unlike the class attribute, which can be used to assign the same class name to multiple elements, the id attribute must have a unique value within the HTML document.

Here's an example of how to use the id attribute:

<div id="header">This is the header section.</div>

In this example, the <div> element has an id attribute with the value of "header". This ID can be used to uniquely identify and target this specific element using CSS or JavaScript.

To select an element with a specific ID in CSS, you can use the # symbol followed by the ID value:

#header {

  background-color: blue;

  color: white;

}

In this CSS example, the background color of the element with the ID "header" will be set to blue, and the text color will be set to white.

In JavaScript, you can use the getElementById() method to select an element by its ID:

var element = document.getElementById('header');

// Perform actions on the element with the ID "header"

In this JavaScript example, the getElementById() method is used to retrieve the element with the ID "header". You can then perform various actions on that element.

The id attribute is especially useful when you want to uniquely identify and target a specific element on your web page. It is commonly used for navigation menus, header or footer sections, or any element that requires individualized styling or functionality. Just remember that each id value should be unique within the HTML document to comply with the HTML specification.