CSS3+Bezier curve to achieve scalable input search box effect

Without further ado, here are the renderings.

The core code is transition: cubic-bezier(0.68, -0.55, 0.27, 1.55) all 1s; a buffer effect is added to the transition effect through the cubic-bezier (Bessel curve) of the transition attribute. The main module of the HTML code is an input plus a parent div. The div width needs to be larger than the input width. Without cubic-bezier, this effect can be achieved. transition: all 1s;

The transition effect lacks a buffer effect. The motion curve we use here is

Finally, the complete code

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <style type="text/css">
            .search-wrap{
                margin: 0 auto;
                width: 200px;
                height: 200px;
            }
            .search{
                width: 50px;
                height: 30px;
                margin: 20px 10px 0 0;
                border: 1px solid #4000FF !important;
                padding: 0 10px;
                float: right;
                border-radius: 5px;
                color: #fff;
                transition: all 1s;
                opacity: .5;
            }
            .search:focus{
                width: 100%;
                outline:none;
            }
        </style>
    </head>
    <body>
        <div class="search-wrap">
            <input type="text" name="" class="search">
        </div>
    </body>
</html>

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