CSS (Cascading Style Sheets) is a language used to style web pages. Mastering CSS allows you to adjust the external performance of web pages as you like. Here are the steps on how to write CSS:
- Create a CSS file
In the HTML file, use the <link> tag to link the CSS file to the HTML file. For example:
<link>
In this example, we link a CSS file named styles.css into the HTML document.
- Writing CSS syntax
In a CSS file, you need to write a selector and a set of declarations to set the style. For example, if you want to set the color of all paragraphs in HTML to red, you can use the following code:
p { color: red; }
In this example, p
is the "selector" that specifies the style that needs to be set. HTML element. color
is the "attribute", specifying the color of the element, and red
is the "attribute value".
- Using different selectors
CSS provides multiple selector types for selecting different HTML elements. The following are some commonly used selectors:
- Tag selector: Selects all elements of the specified type, for example:
p{}
. - Class selector: Select elements with the specified class attribute, for example:
.text{}
. - ID selector: Select elements with the specified ID attribute, for example:
#title{}
. - Other selectors: There are other types of selectors, such as attribute selectors, pseudo-class selectors, etc.
- Using different properties
CSS has a variety of properties that can be used to control the styling of elements. For example:
-
color
: Specifies the color of the text. -
background-color
: Specify the color of the background. -
font-size
: Specify the font size. -
font-family
: Specify the font type. -
margin
: Specifies the margin around the element. -
padding
: Specify the padding around the element.
- Set the appearance of the element
Methods to further set the appearance of the element include:
- ##border
Attribute : Used to create a border around an element.
- width
and
heightattributes: used to set the width and height of the element.
- display
Attribute: used to change the display mode of the element.
- Understanding the CSS Box Model
- Inheritance and Cascading
- Debugging CSS code
The above is the detailed content of how to write css. For more information, please follow other related articles on the PHP Chinese website!

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