DOM实作密码输入

<!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>passWordPlus</title>
    <style>
        input,img,p{
            margin: 0px;padding: 0px;
        }
        div{
            display: inline-block;
            position: relative;
        }
        p{
            display: inline-block;
            position: relative;
            left: 15px;
            font-size: 5px;    
        }
        img{
            width: 27px;    
            display:none;
        }
        .iconChange{
            display: block;
            position: absolute;
            left: -5px;
            bottom:-2px;   
        }
        


    </style>
</head>
<body>
    <input id="passWord" type="password">
    <div>
        <img src=""  >  <!--行内权重比较大 不能放行内-->
        <p>密码需6~16位</p>
    </div>
    <script>
        var input = document.getElementById("passWord")
        var icon = document.querySelector('img')
        var hint = document.querySelector("p")

        input.onblur=function(){
            if(input.value.length<6 || input.value.length>16){
                hint.innerHTML="**请注意***密码需6~16位";
                icon.className="iconChange"
                icon.src="img/x.png";
                
            }else{
                hint.textContent=""
                icon.className="iconChange"
                icon.src="img/v.jpg" 
            }
        }

    </script>
</body>
</html>

杂谈