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How to disable css hover

藏色散人Original: 2020-11-17 10:58:473945browse

Reasons for invalidating css hover: 1. In the CSS definition, "a:hover" is not placed after "a:link" and "a:visited"; 2. In the CSS definition, " a:active" is not placed after "a:hover".

Recommended: "css video tutorial"

Several hover failures in CSS Reason:

When setting the CSS hover, sometimes you will find that hover does not work. To summarize the reasons:

Tip: In the CSS definition, a:hover must be placed It is only valid after a:link and a:visited.

Tip: In the CSS definition, a:active must be placed after a:hover to be effective.

1. Add a space before setting:hover:

For example,

<style type="text/css">  
    .one {  
        margin: 0 auto;  
        width: 400px;  
        height: 300px;  
        background: #ced05d;  
    }  
    .two {  
        margin: 0 auto;  
        width: 100px;  
        height: 100px;  
        background: #5a5aea;  
    }  
    .three {  
        margin: 0 auto;  
        width: 200px;  
        height: 100px;  
        background: #4b9c49;  
    }  
    .four {  
        margin: 0 auto;  
        width: 300px;  
        height: 100px;  
        background: #7b4141;  
    }  
    .one :hover {  
        background: #da56d0;  
    }  
</style>  
<body>  
<h1>测试</h1>  
<div class="one">  
    <div class="two">  
      
    </div>  
    <div class="three">  
          
    </div>  
    <div class="four">  
          
    </div>  
</div>  
</body>

You find that the background does not change when the mouse passes by class one, but it passes through other divs inside one. The background color changes.

Explanation: Adding a space before :hover will not have the effect of :hover, but the descendant elements will have the effect of :hover.

2. When the mouse passes over, let other elements change styles:

At this time, you will find that only descendant elements and sibling elements (sibling elements immediately after the element) have an effect. , Others: hover will be invalid

Still the previous example

Change

.one :hover {  
        background: #da56d0;  
    }

.one:hover .two {  
        background: #da56d0;  
    }

We found that we can achieve the effect we want## Changing

# to

.two:hover +.three {  
        background: #da56d0;  
    }

can also achieve the effect (note that removing the " " number will not achieve the effect)

and changing it to

.two:hover .four {  
        background: #da56d0;  
    }

cannot achieve the effect we have The effect (with or without the plus sign)

3. The class name is written incorrectly;

4.:hover is placed before :link and :visited;

5. You read it wrong;

Wait...

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