Introduction and differences between HTML5 inline elements and block-level elements

Introduction and differences between HTML5 inline elements and block-level elements

HTML5 is a markup language used to create the structure of web pages. In HTML5, elements are divided into two types: inline elements and block elements.

Introduction to inline elements:
Inline elements refer to elements that appear as a line in the document flow. They only take up space for their own content and do not disrupt the overall layout of the page. Inline elements can contain text, other inline elements, or portions of block-level elements. Common inline elements include , , , , etc.

The following is a code example for inline elements:

<p>行内元素示例：<span style="color: red;">这是一个红色的文本</span></p>

Introduction to block-level elements:
A block-level element refers to an element that occupies an entire line in the document flow. They will occupy an exclusive line, occupy the entire width, and can set style attributes such as width and height. Block-level elements are often used to create the main structure and layout of a web page. Common block-level elements include

,

,

~

, etc.

The following is a code example for block-level elements:

<div style="width: 200px; height: 100px; background-color: blue;"></div>

The difference between inline elements and block-level elements:

1. Box model: Inline elements only occupy their content The space occupied by the element cannot be set directly, and the space occupied by the element can only be changed by setting padding and margin; while block-level elements will occupy the entire width, and the space occupied by the element can be changed by setting the width and height.
2. Layout attributes: Block-level elements have the default style of display:block, while inline elements have the default style of display:inline. This also means that block-level elements can automatically wrap, and multiple block-level elements will be arranged vertically, while inline elements will not wrap and will be arranged horizontally from left to right.
3. Content restrictions: Block-level elements can contain other block-level elements and inline elements, while inline elements can only contain text and other inline elements.
4. Style attributes: Block-level elements can set style attributes such as width and height, but inline elements cannot set these style attributes directly.

To sum up, there is a big difference in layout and style between inline elements and block-level elements. According to actual needs, we can choose to use appropriate elements to build the structure and layout of the web page.

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