,

to

,

, <li>, etc. They will automatically occupy a whole row and can set width, height and inner and outer margins; common in-line elements such as , , , <input> will not cause line breaks, and are usually used to style some content, but cannot directly set width and height or upper and lower margins; the display attribute of CSS can be changed, for example, using display: inline-block to achieve a compromise effect, which allows setting width and height without forcing line breaks, which helps to flexibly layout.



In web design, the way HTML elements are displayed determines the structure and layout of the page. Among them, block-level elements and inline elements are the two most basic and commonly used types. The main difference between them is the default display method and its impact on page flow.



Block-level elements occupy a row

Common block-level elements include <div> , <code><p></p> , <h1></h1> to <h6></h6> , <ul></ul> , <li> , etc. These elements will automatically occupy a whole line on the page, no matter how much content it is, it will start with a new line and end before the following content.

for example:

<li> Each paragraph <p></p> will display a single line <li> Title <h1></h1> is usually larger than normal text, and it will also be displayed in line breaks. <li> List item <li> If there is no special setting, each list item will have a single line.

Block-level elements can set style attributes such as width, height, inner and outer margins, which makes them very suitable for building the overall structure of a web page, such as navigation bars, content blocks, etc.



The elements in the line are on the same line as other content

Unlike block-level elements, in-line elements do not cause line breaks. Common in-line elements include <span></span> , <a></a> , <strong></strong> , <em></em> , <input> , etc. They are often used to style text or part of content rather than define the overall layout.

for example:

<li> Use <strong></strong> to make certain words in a paragraph bold, without interrupting the arrangement of the entire paragraph <li> <a></a> The tag can embed a link in the middle of the sentence without affecting the position of the previous and subsequent texts <li> <span></span> is often used to add specific colors or backgrounds to certain keywords

Elements in the row cannot directly set width and height, nor do they support margins in the up and down directions, so they are not suitable for structural layout.

The display attribute can change the display method of elements

Although HTML elements have default display types, their behavior can be easily changed through display attribute of CSS.

Commonly used values ??include:

<li> display: block; let an element display like a block-level element <li> display: inline; Make a block-level element into an inline element <li> display: inline-block; is a compromise between the two, allowing width and height to be set, and no forced line wrapping is required.

For example, if you want multiple <div> s to be arranged in a row, you can set their <code>display to inline-block . Or if you want <span></span> to occupy a whole line, you can also do it through display: block;

This trick is very practical when responsive design or when you need to fine-tune the layout.

Basically that's it. Understanding the difference between block-level and in-line elements will help you better control the structure and style of your web page, especially when dealing with complex layouts or debugging typography issues.