CSS3 Transition smooth transition menu bar implementation

This time I will bring you the implementation of CSS3's Transition smooth transition menu bar. What are the precautions for implementing Transition smooth transition menu bar? The following is a practical case, let's take a look.

Syntax

transition: property duration timing-function delay;

First look at the rendering:

Principle illustration:

When the mouse moves into the menu list, add a hover style. That is, set the top value of p.wrap to a negative value. Then use the transition attribute to make it a smooth transition.

<!--html-->
<style>
 .menu{
        margin: 100px auto;
    }
    .menu ul li{
        float:left;
        width: 50px;
        height: 25px;
        background-color: #2aabd2;
        margin-right: 5px;
        line-height: 25px;
        position: relative;
        overflow: hidden;
    }
    .menu ul li a{
        display: block;
        height:25px;
        width: 50px;
        text-align: center;
        line-height: 25px;
        color: white;
    }
    .menu ul li .awrap{
        position: absolute;
        top:0;
        left: 0;
    }
    .menu ul li .awrap:hover{
        transition: all .3s ease-in;
        top:-25px;
    }
</style>
<p>
    </p>

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