搜索框搜索icon的动效

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        
        html,
        body {
            height: 100%;
        }
        
        body {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .box {
            position: relative;
            width: 300px;
            height: 40px;
        }
        
        .inp {
            width: 100%;
            height: 100%;
            border-radius: 8px;
            border: 1px solid #000;
            padding-left: 20px;
            outline: none;
        }
        
        .icon {
            position: absolute;
            left: 10px;
            top: 10px;
            width: 20px;
            height: 20px;
            -webkit-transition: 0.3s;
            transition: 0.3s;
        }
    </style>
    <script type="text/javascript">
        let inpValue = ''

        function hideIcon() {
            const icon = document.getElementsByClassName('icon')[0];
            // icon.style.display = "none";
            if (!inpValue) {
                icon.style.display = "block";
            } else {
                icon.style.display = "none"
            }
            icon.style.transform = 'rotateY(90deg)'
        }

        function showIcon() {
            const icon = document.getElementsByClassName('icon')[0];
            // icon.style.display = "block";
            if (inpValue) {
                icon.style.display = "none";
            } else {
                icon.style.display = "block";
                setTimeout(() => {
                    icon.style.transform = 'rotateY(0deg)'
                }, 60)
            }
        }

        function inputEvent(e) {
            inpValue = e.value
        }
    </script>
</head>

<body>
    <div class="box">
        <input class="inp" type="text" onfocus="hideIcon()" onblur="showIcon()" oninput="inputEvent(this)">
        <img class="icon" src="http://common.static.sangeayi.cn/jmqh/%E6%90%9C%E7%B4%A2.png" alt="">
    </div>
</body>

</html>
搜索框搜索icon的动效

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