京东输入信息被放大效果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        input{
            outline: none;
            color: #999;
        }
        div{
           width: 200px;
           height: 50px;
           border: 1px;
           border-style:solid dashed dashed;
           display: none;
           font-size: 20px;
        }
    </style>
</head>
<body>
    <div></div>
    <input type="text" value="iphone 13">
<script>
    var div=document.querySelector('div')
    var text=document.querySelector('input');
    text.addEventListener('focus',function(){
        if(this.value=='iphone 13'){
           this.value='';
        }
        this.style.color='#333';
    })
    text.addEventListener('blur',function(){
        if(this.value==''){
            this.value='iphone 13';
        }
        this.style.color='#999'
    })
    document.addEventListener('keyup',function(e){
        if(e.keyCode==83){
            text.focus();
        }
    })
    text.addEventListener('keyup',function(e){
        if(this.value==''){
            div.style.display='none'
        }else{
        div.style.display='block'
        div.innerHTML=this.value;
        }
    })
    text.addEventListener('blur',function(){
        div.style.display='none'
    })
    text.addEventListener('focus',function(){
        if(text.value!=''){
            div.style.display='block'
        }
    })
</script>
</body>
</html>
京东 输入信息被放大效果

猜你喜欢

京东输入信息被放大效果
