The "@" symbol in CSS is used to introduce directives and rules, including rule sets (defining styles) and directives (setting rules unrelated to styles, such as importing style sheets). Such as: @import, @media, @keyframes.
The "@" symbol in CSS
In Cascading Style Sheets (CSS), the "@" symbol is a special character that has a specific purpose.
Usage:
The "@" symbol is used in CSS to introduce various directives and rules, including:
- ## Rule set: starts with "@" and is used to define a set of styles that apply to specific elements or selectors.
- Command: Starts with "@" but is not followed by curly brackets. It is used to set rules unrelated to styles, such as importing external style sheets or defining variables.
Syntax:
The "@" symbol is followed by an instruction or rule, usually followed by a keyword. For example:- @import
: Import an external style sheet file
- @media
: Create a media query to apply styles under specific conditions
- @keyframes
: Define key frames of CSS animation
Example:
@import "styles.css"; @media (min-width: 768px) { body { font-size: 1.2rem; } } @keyframes fade { 0% { opacity: 0; } 100% { opacity: 1; } }
Notes :
- The "@" symbol always starts with a lowercase letter.
- Directives or rules following the "@" symbol must end with a semicolon (;).
- Keywords and rules after the "@" symbol are case-sensitive.
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