程式碼
<html>
<head>
</head>
<body id="body">
<form action="javascript:void(0);" id="exampleForm">
<input type="passord" id="examplePass"/>
<input type="submit /">
</form>
</body>
<script>
document.getElementById("exampleForm").onsubmit=function(){
var passwordRegex=/^[A-Za-z\d]{6,}$/;
if(!passwordRegex.test(document.getElementById("examplePass").value)){
console.log("Regex didn't match");
var notify = document.getElementById("notify");
if(notify= = = null){
notify = document.createElement("p");
notify.textCintent = "Passwords at least 6
characters long and consist of uppercase character, lowercase
characters,and digits only."
notify.id = "notify";
var body = document.getElementById("body");
body.appendChild(notify);
}
}
};
</script>
</html>
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