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This article will explain in detail about the use of focus in the css style, the editor thinks it is very practical, so share it for you to do a reference, I hope you can get something after reading this article.

In css, focus means "focus", a pseudo-class selector that selects the element that gets the focus; the ": focus" selector allows you to style the element that gets the focus, and the syntax is "element: focus {css style code;}".

The operating environment of this tutorial: windows10 system, CSS3&&HTML5 version, Dell G3 computer.

In css, focus means focus, which usually means ": focus" selector, and ": focus" selector is used to select the element that gets focus. Elements that receive keyboard events or other user input are allowed: focus selector.

Examples are as follows:

Input:focus {background-color:yellow;}

Click in the text box and you will see a yellow background:

First name:

Last name:

Note: if: focus is used for IE8, it must be declared.

Output result:

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