Difference Between id and class in HTML
In HTML, both id and class are used to uniquely identify or group elements, but they serve different purposes. An id is meant to uniquely identify a single element on a page, while a class can be shared by multiple elements to apply common styles or behaviors.
id is unique within a page; no two elements should share the same id.
class can be used on multiple elements to apply the same styles or behavior.
In CSS, id is selected using # (e.g., #header), while class is selected using . (e.g., .highlight).
In JavaScript, getElementById() is used for id, while getElementsByClassName() or querySelectorAll() is used for class.
Use id for a single, unique element (like navigation bar, footer).
0-2 years experience
Use class for reusable styling or grouping elements (like buttons, highlighted text).
5-8 years experience
8+ years experience
