表单邮箱密码登录原生+Jquery实现

文章目录

- 效果
- 代码
- - 邮箱验证正则表达式
  - HTML
  - CSS
- JS

效果

请添加图片描述

正确密码为：123456
点击登录按钮校验。

代码

表单校验 - CodeSandbox

邮箱验证正则表达式

/(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/

HTML

<!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>HTML + CSS</title><link rel="stylesheet" href="styles.css" /></head><body><div class="emailSign"><div class="emailInput"><input type="text" placeholder="邮箱" maxlength="256" /><p class="emailInvalid inputError">请输入正确邮箱</p></div><div class="pwdInput"><inputclass="pwdValue"type="password"name=""id=""placeholder="密码（6-32位）"minlength="6"maxlength="32"/></div><p class="pwdEmpty inputError">请输入密码</p><p class="bothError inputError">邮箱或密码错误</p><p class="pwdShort inputError">密码在6-32位</p><div class="btn">Sign in</div></div><!-- <script  type="text/javascript" src="https://code.jquery.com/jquery-3.3.1.min.js"></script> --><scripttype="text/javascript"src="https://s3.pstatp.com/cdn/expire-1-M/jquery/3.3.1/jquery.min.js"></script><script src="./index.js"></script></body>
</html>

CSS

.emailSign {display: flex;flex-direction: column;padding: 16px 20px;
}.emailInput input,
.pwdInput input {box-sizing: border-box;height: 48px;width: 100%;padding: 12px 16px;border-radius: 12px;background: rgba(255, 255, 255, 0.1);
}.emailSign .emailInput {margin-bottom: 32px;
}.emailSign input {color: #333;
}.emailSign .btn {height: 48px;line-height: 48px;text-align: center;margin-top: 36px;font-size: 16px;font-weight: 500;color: #fff;border-radius: 12px;background: #ff2828;opacity: 0.2;
}.inputError {margin-top: 4px;margin-left: 12px;color: #ff2828;font-size: 12px;font-weight: 400;
}

JS

init();// 输入框填写则按钮高亮，否则置灰
$(".pwdValue").change(function () {if (btnStateCheck()) $(".btn").css("opacity", "1");else $(".btn").css("opacity", "0.2");
});$(".emailInput input").change(function () {if (btnStateCheck()) $(".btn").css("opacity", "1");else $(".btn").css("opacity", "0.2");
});// 点击按钮
$(".btn").on("click", function (e) {btnClick();
});// 初始化
function init() {emailSuccess();pswClearError();
}// 点击按钮
function btnClick() {let flag1 = emailCheck();let flag2 = pswCheck();if (flag1 && flag2) {emailSuccess();pswClearError();}
}// 输入框都填写返回true
function btnStateCheck() {const psw = $(".pwdValue")[0].value;const email = $(".emailInput input")[0].value;if (psw !== "" && email !== "") return true;else return false;
}// 验证是否是邮箱
function isEmail(str) {var reg =/(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/;return reg.test(str);
}// 检查邮箱是否合法
function emailCheck() {const email = $(".emailInput input")[0].value;let flag = false;if (email === "" || !isEmail(email)) {emailError();} else {emailSuccess();flag = true;}return flag;
}// 邮箱合法与否
function emailError() {$(".emailInput input").css("border", "1px solid #ff2828");$(".emailInvalid").show();
}function emailSuccess() {$(".emailInput input").css("border", "");$(".emailInvalid").hide();
}// 密码输入正确
function pswClearError() {$(".pwdEmpty").hide();$(".bothError").hide();$(".pwdShort").hide();$(".emailInput input").css("border", "");$(".pwdInput input").css("border", "");
}// 验证密码是否合法
function pswCheck() {const psw = $(".pwdValue")[0].value;if (psw === "") {pswClearError();$(".pwdEmpty").show();$(".pwdInput input").css("border", "1px solid #ff2828");return false;} else if (psw.length < 6) {pswClearError();$(".pwdShort").show();$(".pwdInput input").css("border", "1px solid #ff2828");return false;} else if (psw !== "123456") {// 假设密码是123456pswClearError();$(".bothError").show();$(".emailInput input").css("border", "1px solid #ff2828");$(".pwdInput input").css("border", "1px solid #ff2828");} else {return true;}
}