CSS Basic
CSS HOMECSS Introduction
CSS Syntax
CSS Id & Class
CSS How To
CSS Styling
Styling BackgroundsStyling Text
Styling Fonts
Styling Links
Styling Lists
Styling Tables
CSS Box Model
CSS Box ModelCSS Border
CSS Outline
CSS Margin
CSS Padding
CSS Advanced
CSS Grouping/NestingCSS Dimension
CSS Display
CSS Positioning
CSS Floating
CSS Align
CSS Pseudo-class
CSS Pseudo-element
CSS Navigation Bar
CSS Image Gallery
CSS Image Opacity
CSS Image Sprites
CSS Media Types
CSS Attribute Selectors
CSS Don't
CSS Summary
CSS Examples
CSS ExamplesCSS Quiz
CSS QuizCSS Certificate
CSS References
CSS ReferenceCSS Reference A to Z
CSS Reference Aural
CSS Web Safe Fonts
CSS Units
CSS Colors
CSS Colorvalues
CSS Colornames
CSS Id and Class
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The id and class Selectors
In addition to setting a style for a HTML element, CSS allows you to specify your own selectors called "id" and "class".
The id Selector
The id selector is used to specify a style for a single, unique element.
The id selector uses the id attribute of the HTML element, and is defined with a "#".
The style rule below will be applied to the element with id="para1":
Example
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Do NOT start an ID name with a number! It will not work in Mozilla/Firefox.
The class Selector
The class selector is used to specify a style for a group of elements. Unlike the id selector, the class selector is most often used on several elements.
This allows you to set a particular style for any HTML elements with the same class.
The class selector uses the HTML class attribute, and is defined with a "."
In the example below, all HTML elements with class="center" will be center-aligned:
Example
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You can also specify that only specific HTML elements should be affected by a class.
In the example below, all p elements with class="center" will be center-aligned:
Example
Try it yourself » |
Do NOT start a class name with a number! This is only supported in Internet Explorer.
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