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how to use! important to change the order of priorities in CSS

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Release： 2018-11-20 17:23:23

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The priority of each style sheet is recorded on the previous page. What will happen if multiple values are set for the attributes of the same element in the same style sheet? This article will share with you how to use it! important to change the order of priorities in CSS.

Let’s look at a simple example. First, create the target HTML statement

<!DOCTYPE html>
<html>
<head>
	<title></title>
	<style type="text/css">
strong {
  color: #00ff00;
}
strong {
  color: #ff0000;//red
}
	</style>
</head>
<body>
<p>
啦啦啦啦<strong>php中文网</strong>
哒哒哒哒哒<strong>php</strong>中文网
</p>
</body>
</html>

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The effect on the browser is as follows: the color of the text in the strong element is red.

how to use! important to change the order of priorities in CSS

Let’s take a look! Use of important

If you want to change the priority in the code, you need to use !important. The usage method is as follows.

选择器{ 
  property（属性）：value（值） ！Important ; 
  }

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When describing a style, if you write !important with a space after the value, the style will be applied first regardless of the normal priority.

Let’s take a look at a specific example. Change the CSS in the above code to the following

<style type="text/css">
strong { 
  color:#00ff00 !important; 
} 

strong { 
  color:#ff0000; 
} 
</style>

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The browser will display the following: the font color in the strong element changes becomes green, !important changes the priority of the style.

how to use! important to change the order of priorities in CSS

Let’s take a look at what happens when the style sheets are different! The use of important

The priority of the style sheet is as follows

(high priority)
The style sheet is described in the HTML document
The user style sheet is viewed by the user
Style table Set the default style table of each browser (low priority)

#. style sheet, the style sheet form will take effect.

So what happens if you add "!Important" in the user stylesheet settings? In this case, styles with "!Important" take precedence. Let’s take a closer look.

(High priority)
Yes! Important user's style sheet
is available! important Write style sheets in HTML documents
Style sheets written in HTML documents
User style sheets
Default style sheets Note that
"user style sheet with! important" has a higher priority than "style sheet described by HTML document with! important". Therefore, even if the creator of the HTML document sets the style to "!Important", if a new style value table is set to "!Important" in the user stylesheet, the user stylesheet will take effect.

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