默認(rèn)佔整行，用於創(chuàng)建佈局容器、組合多個元素、作為樣式或腳本的塊級包裝；2.<span>不強制換行，適用於段落中文字樣式、JavaScript操作內(nèi)聯(lián)部分、保持文本流連貫；3.兩者均可通過CSS自定義樣式，但最佳實踐是按語義使用，以保持HTML結(jié)構(gòu)清晰。

The main difference between <div> and <code><span></span> elements in HTML lies in how they behave by default on a webpage. Both are generic containers used to group content, but <div> is a block-level element, while <code><span></span> is an inline element.

Block-Level vs Inline: What It Means

This distinction affects layout and styling. A <div> will, by default, take up the full width available and start on a new line. This makes it ideal for grouping larger chunks of content like sections, headers, or blocks of text and other elements.<p> On the other hand, a <code><span></span> doesn't force a new line — it flows within the surrounding text. That makes it great for wrapping small parts of content inside a paragraph or sentence, such as highlighting a word or applying specific styles to part of a line.

So if you're trying to wrap something that should sit within a line of text (like a highlighted word), use <span></span> . If you're grouping bigger pieces of your layout (like a whole section), go with <div> .<h3> When to Use <code><div> <ul> <li> To create layout containers</li> <li> For grouping multiple elements together (eg, a heading and paragraph)</li> <li> When you need a block-level wrapper for styling or scripting</li> </ul> <p> For example, if you're building a card layout with an image, title, and description, putting all those inside a <code><div> helps keep them visually grouped and makes it easier to style them together using CSS.<pre class='brush:php;toolbar:false;'> &lt;div class=&quot;card&quot;&gt; &lt;img src=&quot;/static/imghw/default1.png&quot; data-src=&quot;image.jpg&quot; class=&quot;lazy&quot; alt=&quot;&lt;button&gt;和&lt;Input type = button”&gt;元素有什麼區(qū)別？&quot;&gt; &lt;h3&gt;Title&lt;/h3&gt; &lt;p&gt;Description goes here.&lt;/p&gt; &lt;/div&gt;</pre><h3 id="When-to-Use-code-span-code"> When to Use <code><span>

• For styling a small part of text
• To target a specific piece of inline content with JavaScript
• Inside paragraphs or headings where line breaks aren't desired

Say you want to highlight just one word in a sentence — wrapping that word in a <span> allows you to apply styles without breaking the flow:

 <p>This is a <span class="highlight">very important</span> point.</p>

In this case, the styled word stays within the same line of text.

Can You Style Them the Same?

Technically yes — both can be styled using CSS. However, their default display behavior matters when you're not overriding it. But if you change the display property in CSS (like setting display: inline on a