What does overflow mean?

Overflow is an attribute used to control the overflow content of an element. When the content of an element exceeds its specified size, the overflow attribute can determine how to handle the overflow content. The values ​​of the overflow attribute include visible, hidden, scroll, auto and clip. It only works on elements with specified sizes. For elements without specified sizes, such as inline elements or block-level elements without set width and height, the overflow attribute does not work. will have any effect.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

In CSS, overflow is a property used to control the overflow content of an element. When the content of an element exceeds its specified size, the overflow attribute determines how to handle the overflow content. The overflow attribute has the following possible values:

1. visible: default value. When content exceeds the dimensions of an element, the overflowed content appears outside the element and may cover other elements.

2. hidden: When the content exceeds the size of the element, the overflowing content will be cropped and not displayed outside the element. This hides overflow content.

3. scroll: When the content exceeds the size of the element, a scroll bar will be displayed, and the user can use the scroll bar to view the overflowing content.

4. auto: When the content exceeds the size of the element, it will automatically choose to display the scroll bar or hide the overflowing content as needed. If the content does not exceed the dimensions of the element, no scroll bars are displayed.

In addition to the above four values, there is also a value of clip. The clip value will clip the overflow content of the element and not display it outside the element.

The overflow attribute is usually used for container elements with fixed sizes, such as div or p, etc. By setting the overflow attribute, you can control how the content in the container element behaves when it overflows.

It should be noted that the overflow attribute only works on elements with specified sizes. For elements without specified dimensions, such as inline elements or block-level elements with no set width and height, the overflow attribute has no effect.

In actual development, the overflow attribute is often used to deal with text overflow, image overflow, etc. For example, you can use the overflow attribute to limit the display of text within a specified area to prevent text overflow from affecting the page layout.

In addition, the overflow attribute can also be used in combination with other attributes, such as overflow-x and overflow-y to control the horizontal and vertical overflow of elements respectively. You can also control the way text wraps by setting the overflow-wrap or word-wrap attributes.

To summarize, overflow is a property in CSS used to control the overflow content of elements. By setting different values, you can decide how the overflow content is displayed, such as displaying outside the element, hiding, showing scroll bars, etc. Proper use of the overflow attribute can handle element overflow and improve page usability and user experience.

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