What does span mean in js

span tag can add styles, attributes or behaviors to text. It is used to: add styles, such as color and font size. Set attributes such as id, class, etc. Associated behaviors, such as clicks, hovers, etc. Mark text for further processing or citation.

span tag

The span tag is used to define the range of some text in the document, add styles to specific text, attribute or behavior. The syntax is as follows:

<code class="html"><span>文本</span></code>

Usage

span tag is mainly used for:

• Style text: Use CSS to add styles, such as color, Font size, background color.
• Set attributes: Add attributes, such as id, class, etc., to facilitate script or style sheet operations in the document.
• Associated behavior: Add event listeners, such as click, hover, etc., to add interactivity to specific text.
• Mark text: Used to mark specific text in a document for further processing or reference.

Example

The following example demonstrates the use of the span tag:

<code class="html"><p>这是我的一句话，我想将 "我" 字设置为粗体。</p>

<script>
  document.querySelector("span").style.fontWeight = "bold";
</script></code>

Effect:

<code class="html">这是我的一句话，我想将 <span style="font-weight: bold;">我</span> 字设置为粗体。</code>

The difference from other tags

The difference between the span tag and other similar tags (such as em, strong, b) is that it does not affect the text semantics, but only adds styles or attributes. For example, the em tag emphasizes text, while the span tag simply styles the text.

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