What does focus mean in css style?

In CSS, focus means "focus" and is a pseudo-class selector, which is used to select the element that has the focus; the ":focus" selector can be used to set styles for the element that has the focus. The syntax is "element:focus{css style code;}".

The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.

What does focus mean in css style?

In css, focus means focus, which usually means ":focus" selection The ":focus" selector is used to select the focused element. The :focus selector is allowed on elements that receive keyboard events or other user input.

The example is as follows:

   
  
在文本框中点击，您会看到黄色的背景：
 
 First name: 
 Last name:  
 
注释：如果 :focus 用于 IE8 ，则必须声明 。
  

Output result:

(Learning video sharing:css video tutorial)

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