Placing CSS code in an external file improves reusability, eases maintenance, improves performance, facilitates team collaboration, and optimizes browser caching: Create a text file with a .css extension. Write CSS styles in a file. Use the <link> element in the
of the HTML file to link to an external CSS file.
HTML external CSS writing method
How to place CSS code in an external file?
To write CSS code in an external file, please follow these steps:
- Create a CSS file: Create a new text file and add Its extension is saved as ".css". For example, "styles.css".
- Write CSS code to a file: Write the required CSS styles in a file, similar to inline styles in an HTML file.
-
Link to a CSS file in an HTML file: In the
section of the HTML file, use the
<link>
element Link to external CSS files. For example:
<head> <link rel="stylesheet" href="styles.css"> </head>
Benefits
Benefits of using external CSS files include:
- Reusability:External CSS files can be referenced by multiple HTML files to achieve style reuse.
- Easy to maintain: All styles are concentrated in one file for easy centralized modification and maintenance.
- Improve performance: External CSS files can reduce the size of HTML files, thereby improving loading speed.
- Team Collaboration: External CSS files allow multiple developers to work on styles at the same time without conflict.
- Browser cache: External CSS files are usually cached by the browser and do not need to be re-downloaded on subsequent loads.
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区别是:css是层叠样式表单,是将样式信息与网页内容分离的一种标记语言,主要用来设计网页的样式,还可以对网页各元素进行格式化;xml是可扩展标记语言,是一种数据存储语言,用于使用简单的标记描述数据,将文档分成许多部件并对这些部件加以标识。

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转换方法:1、给英文元素添加“text-transform: uppercase;”样式,可将所有的英文字母都变成大写;2、给英文元素添加“text-transform:capitalize;”样式,可将英文文本中每个单词的首字母变为大写。

在css中,rtl是“right-to-left”的缩写,是从右往左的意思,指的是内联内容从右往左依次排布,是direction属性的一个属性值;该属性规定了文本的方向和书写方向,语法为“元素{direction:rtl}”。

在css中,可以利用“font-style”属性设置i元素不是斜体样式,该属性用于指定文本的字体样式,当属性值设置为“normal”时,会显示元素的标准字体样式,语法为“i元素{font-style:normal}”。

在css3中,可以用“transform-origin”属性设置rotate的旋转中心点,该属性可更改转换元素的位置,第一个参数设置x轴的旋转位置,第二个参数设置y轴旋转位置,语法为“transform-origin:x轴位置 y轴位置”。


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