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There are several types of css style sheets and how to use them respectively

下次还敢Original: 2024-04-06 02:30:20574browse

There are three types of CSS style sheets: inline, internal, and external. Inline styles apply to specific elements, internal styles apply to the entire document, and external styles can be used across multiple documents. With CSS, a style rule consists of a selector, which specifies the element to which the style is to be applied, and a declaration block, which contains the style properties and values. Different types of style sheets have their own pros and cons: inline styles are more specific but clutter the document; internal styles are less specific but cleaner; external styles are the most general and suitable for large projects.

Types of CSS style sheets and how to use them

Types of CSS style sheets

There are three main types of CSS style sheets:

Inline styles: Styles written directly within HTML elements, using the style attribute .
Internal styles: Styles written within the <style> element and placed in the <head> section of the HTML document.
External styles: Styles written in separate files (usually with a .css extension), through the <link> element Import HTML documents.

Usage

Inline style

<code class="html"><p style="color: red;">这是一个红色的段落。</p></code>

Internal style

<code class="html"><head>
  <style>
    p {
      color: blue;
    }
  </style>
</head></code>

External style

<code class="html"><head>
  <link rel="stylesheet" href="style.css">
</head></code>

In a CSS file, style rules consist of selectors and declaration blocks:

SelectorSpecifies the Elements to which styles are applied:

<code class="css">p { /* 针对段落元素的样式 */ }</code>

Declaration block Contains style attributes and values:

<code class="css">p {
  color: blue; /* 设置段落元素的文本颜色 */
  font-size: 20px; /* 设置段落元素的字体大小 */
}</code>

Advantages and disadvantages of different types of style sheets

Inline styles: Specific, but can clutter the HTML document.
Internal styles: Less specific, but neater than inline styles.
External style: The most versatile and reusable, recommended for large projects.

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