文章目錄
- 效果
- 代碼
- 郵箱驗證正則表達式
- HTML
- CSS
- JS
效果
正確密碼為：123456
點擊登錄按鈕校驗。
代碼
表單校驗 - CodeSandbox
郵箱驗證正則表達式
/(?:[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="郵箱" maxlength="256" /><p class="emailInvalid inputError">請輸入正確郵箱</p></div><div class="pwdInput"><inputclass="pwdValue"type="password"name=""id=""placeholder="密碼（6-32位）"minlength="6"maxlength="32"/></div><p class="pwdEmpty inputError">請輸入密碼</p><p class="bothError inputError">郵箱或密碼錯誤</p><p class="pwdShort inputError">密碼在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();// 輸入框填寫則按鈕高亮，否則置灰
$(".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");
});// 點擊按鈕
$(".btn").on("click", function (e) {btnClick();
});// 初始化
function init() {emailSuccess();pswClearError();
}// 點擊按鈕
function btnClick() {let flag1 = emailCheck();let flag2 = pswCheck();if (flag1 && flag2) {emailSuccess();pswClearError();}
}// 輸入框都填寫返回true
function btnStateCheck() {const psw = $(".pwdValue")[0].value;const email = $(".emailInput input")[0].value;if (psw !== "" && email !== "") return true;else return false;
}// 驗證是否是郵箱
function isEmail(str) {var reg =/(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[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);
}// 檢查郵箱是否合法
function emailCheck() {const email = $(".emailInput input")[0].value;let flag = false;if (email === "" || !isEmail(email)) {emailError();} else {emailSuccess();flag = true;}return flag;
}// 郵箱合法與否
function emailError() {$(".emailInput input").css("border", "1px solid #ff2828");$(".emailInvalid").show();
}function emailSuccess() {$(".emailInput input").css("border", "");$(".emailInvalid").hide();
}// 密碼輸入正確
function pswClearError() {$(".pwdEmpty").hide();$(".bothError").hide();$(".pwdShort").hide();$(".emailInput input").css("border", "");$(".pwdInput input").css("border", "");
}// 驗證密碼是否合法
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();$(".pwdInput input").css("border", "1px solid #ff2828");return false;} else if (psw !== "123456") {// 假設密碼是123456pswClearError();$(".bothError").show();$(".emailInput input").css("border", "1px solid #ff2828");$(".pwdInput input").css("border", "1px solid #ff2828");} else {return true;}
}
)
