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validator.html
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validator.html
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<!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>使用策略模式验证表单</title>
</head>
<body>
<form action="http://www.baidu.com" method="post" id="registerForm">
请输入用户名
<input type="text" name="userName"/>
<br>
请输入密码
<input type="password" name="password"/>
<br>
请输入手机号码
<input type="text" name="phoneNumber"/>
<button>提交</button>
</form>
<script>
// 命名空间
var strategies = {
// errorMsg参数,提升了适用性
isNonEmpty: function (value, errorMsg) {
if (value === '') {
// 返回字符串true 错误信息
return errorMsg;
}
},
minLength: function (value, length, errorMsg) {
if (value.length < length) {
return errorMsg;
}
},
isMobile: function (value, errorMsg) {
if (!/^1[1|5|8|7|4|3][0-9]{9}$/.test(value)) {
return errorMsg;
}
}
}
var Validator = function() {
this.cache = [];
}
Validator.prototype.start = function() {
for(var i = 0, validatorFunc;
validatorFunc = this.cache[i++];) {
var msg = validatorFunc();
if (msg) {
return msg;
}
}
}
Validator.prototype.add = function(ele, rule, errorMsg) {
var arr = rule.split(':');
this.cache.push(function() {
// 规则
var strategy= arr.shift();
arr.unshift(ele.value);
arr.push(errorMsg);
return strategies[strategy].apply(ele, arr);
})
}
const registerForm =
document.getElementById('registerForm');
function validateFunc () {
// 校验处理 分离出去
var validator = new Validator();
// 一个个去校验,
// 数组 遍历
validator.add(registerForm.userName,
'isNonEmpty', '用户名不能为空');
validator.add(registerForm.password,
'minLength:6', '密码长度不能少于6位');
validator.add(registerForm.phoneNumber,
'isMobile', '手机号码格式不正确');
var errorMsg = validator.start();
// 一个个去校验,
return errorMsg;
}
registerForm.onsubmit = function() {
// 一票规则 数组
var errorMsg = validateFunc();
if (errorMsg) {
alert(errorMsg);
return false;
}
}
// registerForm.onsubmit = function() {
// var username = registerForm.userName.value;
// var password = registerForm.password.value;
// var phone = registerForm.phoneNumber.value;
// alert([username , password, phone]);
//
// var usernameMsg = strategies.isNonEmpty(username, '用户不能为空');
// if (usernameMsg){
// alert(usernameMsg);
// return false;
// }
// var passwordMsg = strategies.minLength(password, 6,'密码不能小于6位数');
// if (passwordMsg) {
// alert(passwordMsg);
// return false;
// }
// var phoneMsg = strategies.isMobile(phone, '手机号码格式不正确')
// if (phoneMsg) {
// alert(phoneMsg);
// return false;
// }
// }
</script>
</body>
</html>