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CSS (Cascading Style Sheets) is a style language used to define how HTML (Hypertext Markup Language) documents are presented. It separates the look and layout of a website from its content, making it easier to maintain and modify.
When writing a CSS style sheet, we need to import it into the HTML document. Here are some common methods of importing CSS.
External CSS stylesheets are usually contained in a separate file and referenced through a link to the HTML document. Using external style sheets allows these style sheets to be shared across multiple HTML documents, greatly reducing the copying and pasting of code.
To import an external style sheet, we need to use the 2cdf5bf648cf2f33323966d7f58a7f3f element at the head of the HTML document to link. For example, the following code will import an external style sheet named "styles.css":
<head> <link rel="stylesheet" type="text/css" href="styles.css"> </head>
In the above code, the href
attribute specifies the path to the style sheet file. The style sheet file can be placed in the same directory as the HTML document, or it can be placed in another directory. The path needs to be specified according to the actual situation.
Internal style sheets are usually included in the c9ccee2e6ea535a969eb3f532ad9fe89 element at the head of the HTML document. Using an internal style sheet allows you to place the style sheet and the HTML document in the same file without the need to create a separate style sheet file.
To import an internal style sheet, we need to use the c9ccee2e6ea535a969eb3f532ad9fe89 element at the head of the HTML document. For example, the following code will import the internal style sheet:
<head> <style> /* CSS代码 */ </style> </head>
In the above code, the c9ccee2e6ea535a969eb3f532ad9fe89
element contains the CSS code. Where we can use CSS syntax to define the style of the website.
Inline style sheets usually use the style
attribute of an HTML element to define the style of the element. Inline style sheets allow you to apply styles directly to individual elements, but this is not recommended for widespread use across an entire website.
To use an inline style sheet, we need to add the style
attribute on the HTML element and specify the CSS style in its attribute value. For example, the following code will define a paragraph with red text and a background color:
<p style="color: red; background-color: yellow;">这是一个段落</p>
While inline style sheets are easy, tracking code and changing styles can become difficult. Therefore, we should avoid using inline style sheets whenever possible.
In short, importing CSS can improve the maintainability and scalability of the website, allowing us to make changes to the appearance and layout of the website more easily. Whether you use an external style sheet, an internal style sheet, or an inline style sheet, you should choose the most appropriate method based on the actual situation.
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