Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
In the world of web development, HTML (Hypertext Markup Language) is the backbone of creating web pages. HTML allows us to structure content, define elements, and style them using CSS (Cascading Style Sheets). To make our web pages more interactive and functional, we often need a way to uniquely identify specific elements, and that’s where the HTML id
attribute comes into play.
The id
attribute is a fundamental feature of HTML. It is used to provide a unique identifier for an HTML element. Each id
value within a document must be unique; no two elements can share the same id
. This uniqueness enables developers to target and manipulate specific elements using CSS and JavaScript.
To assign an id
to an HTML element, you need to include the id
attribute within the element’s opening tag. Here’s the basic syntax:
<element id="unique-identifier">Content goes here</element>
result:
Content goes hereThe “unique-identifier” should be a name you choose, but it must be unique within the document. Let’s explore this with an example.
Consider a simple webpage that displays information about a book. We want to uniquely identify and style various elements on the page using the id
attribute.
<!DOCTYPE html>
<html>
<head>
<title>Book Information</title>
<style>
#book-title {
font-weight: bold;
color: #1e90ff;
}
#author-name {
font-style: italic;
color: #008000;
}
</style>
</head>
<body>
<h2 id="book-title">The Great Gatsby</h2>
<p>Written by <span id="author-name">F. Scott Fitzgerald</span></p>
<p id="summary">"The Great Gatsby" is a classic novel...</p>
</body>
</html>
result:
Written by
“The Great Gatsby” is a classic novel…
In this example, we have assigned the id
attribute to the following elements:
id="book-title"
.id="author-name"
.id="summary"
.We have also used CSS to style these elements differently based on their id
. The #book-title
selector applies a bold font and blue color to the book title, and the #author-name
selector adds an italic style and green color to the author’s name.
id
attribute provides a reliable way to select and manipulate specific elements, making it an essential tool for JavaScript and CSS.In summary, the HTML id
attribute is a vital component of web development that enables you to uniquely identify and manipulate elements within your web pages. It enhances both the functionality and accessibility of your web content and is an essential tool for any web developer’s toolkit.