What is the Difference Between Class and ID?
🆚 Go to Comparative Table 🆚The main difference between a Class and an ID in HTML lies in their uniqueness and applicability. Here are the key differences:
- Uniqueness: An ID is unique within a page and can only be applied to one HTML element, while a Class can be applied to multiple HTML elements.
- Applicability: You can use the same Class on multiple elements, but each element can have only one ID.
- Syntax: In CSS, the ID is denoted using the "#" symbol followed by the ID name, while the Class is denoted using the "." symbol followed by the Class name.
- Styles: Each ID and Class can have an unlimited number of styles applied to them.
- Multiple Classes: A single HTML element can have multiple Classes applied to it.
In summary, use an ID when you need to apply a unique style to a single element, and use a Class when you need to apply the same style to multiple elements. Both IDs and Classes can have multiple styles applied to them, and they are essential for organizing and styling your HTML content effectively.
Comparative Table: Class vs ID
The difference between a class and an ID in HTML and CSS lies in their purpose and usage:
| Class | ID |
|---|---|
| Classes are used to denote multiple elements that will receive the same styling. They can be applied to multiple HTML elements and are not unique. | IDs are unique and can only apply to at most one element on the page. They are used to identify a single element and are not meant to be used by multiple elements. |
| Class naming is case sensitive, and each class can have an unlimited amount of styles applied to it. | Each ID can have an unlimited amount of styles applied to it, but there must be only one ID per element. |
| To select an element with a class, you use the ".class-name" selector in CSS. | To select an element with an ID, you use the "#id-name" selector in CSS. |
In summary, classes are used to apply the same styling to multiple elements, while IDs are used to uniquely identify and apply styling to a single element.
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