The Difference and Application of div and span "div" and "span" are both commonly used HTML tags, but they have distinct differences in terms of their purpose, behavior, and typical applications: 1. **Block vs Inline**: - **div**: This is a block-level element. It occupies the full width available and starts on a new line. It's typically used to group larger chunks of content together. - **span**: This is an inline element. It only takes up as much width as necessary and does not force a new line. It's usually used for smaller portions of text or content within a block. 2. **Use Cases**: - **div**: Ideal for sectioning off parts of a webpage such as headers, footers, sidebars, etc. It can also be used to apply styles or scripts to a large portion of the page. Example: ```html
This is a block of content inside a div.
``` - **span**: Best suited for applying styles or scripts to a small part of text or content within a block-level element like a paragraph. Example: ```html

This is a highlighted word.

``` 3. **Styling and Layout**: - **div**: Since it's block-level, it affects the layout more significantly. It can be styled with CSS to control its size, position, margins, padding, etc. - **span**: As an inline element, it doesn't affect the overall layout structure; it merely applies styling or functionality to specific parts of the content. 4. **Semantic Meaning**: - Both "div" and "span" are semantically neutral elements. They don't convey any specific meaning about the content they contain. For more semantic markup, consider using other HTML5 tags like `
`, `
`, `
`, `
`, etc., which provide better context for both developers and assistive technologies. In summary, choose "div" when you need to define a block-level container for grouping larger structures, and opt for "span" when targeting smaller, inline portions of content for styling or scripting purposes.

by blackcake on 2008-07-27 20:13:32

Recently, I've been studying div + CSS, and sometimes problems that seem difficult become simpler. I've made a special effort to understand div and span.

Compared with other XHTML tags, div and span have no inherent meaning for the elements they contain. For example, when you see the tag, you know it contains a heading, and when you see the tag, you know it represents a new paragraph. However, div and span tags don't carry such semantic meaning. Div is simply a block-level tag that can divide a webpage into several sections. A div may contain a heading, a paragraph, images, or many other elements, and even another div. On the other hand, span is an inline element (inline tag) and is typically used to define the style of a small segment of text. Another difference between them is that div causes a line break, while span does not.