Class, ID, and Attributes in HTML
Explore how to use class and id attributes along with other HTML attributes to structure web pages effectively. Learn the difference between reusable classes and unique ids, discover how attributes add metadata and behavior, and see practical examples to create interactive, well-organized web content.
In this lesson, we will explore the class, id, and other attributes, which are essential for structuring HTML documents, adding metadata, and connecting HTMl with CSS and JavaScript.
Understanding the class attribute
The class attribute is used to assign one or more class names to an HTML element. Classes are helpful for applying CSS styles or for JavaScript to identify and manipulate elements on the page. A class name is reusable, meaning multiple elements can share the same class.
<tag class="classname">Content</tag>
Consider the following example where both (div and p) elements can be targeted using their class names in CSS or JavaScript.
<div class="container">This is a container</div><p class="text-primary">This is primary text</p>
In the above code:
Line 1: The
divelement has a class namedcontainer.Line 2: The
pelement has a class namedtext-primary. ...