2020年新年大赛！

Question

Kolamik

Asked:2022-08-15 21:48:34 +0000 UTC2022-08-15 21:48:34 +0000 UTC 2022-08-15 21:48:34 +0000 UTC

js表单验证功能不起作用

772

无法编写检查表单有效性的函数。如果所有 3 个字段都填写正确，则该函数应将电子邮件和密码输出到控制台。我创建了 3 个等于 false 的变量 a、b 和 c，并将它们按 1 构建到每个块中。条件中应该有错误的地方，我分配了值 false，并且一切正常 - 真实。然后我尝试做检查。如果所有 3 个字段 = true，则密码和邮件应显示在控制台中。但是由于某种原因，该功能不起作用。

请帮助我理解我错在哪里？

'use strict'

const emailChecker = /^(([^<>()[\].,;:\s@"]+(\.[^<>()[\].,;:\s@"]+)*)|(".+"))@(([^<>()[\].,;:\s@"]+\.)+[^<>()[\].,;:\s@"]{2,})$/iu;


const errorIsOn = document.querySelector('#error');
const preheader = document.querySelector('#preheader');
const emailField = document.querySelector('#e-mail');
const btn = document.querySelector('#btn');
const password = document.querySelector('#password');
const errorpass = document.querySelector('#errorpass');
const errorpass2 = document.querySelector('#errorpass2');
const preheaderpass = document.querySelector('#preheaderpass');
const checkbox = document.querySelector('#box');
const errorpass3 = document.querySelector('#errorpass3');

let a = false;
let b = false;
let c = false;

function isEmailValid(value) {
  return emailChecker.test(value);
}

function onInput() {
  if (isEmailValid(emailField.value)) {
    emailField.style.borderColor = 'green';
    errorIsOn.style.display = 'none';
    preheader.style.color = 'black';
    a = true;
  } else {
    emailField.style.borderColor = 'red';
    errorIsOn.style.display = 'initial';
    preheader.style.color = 'red';
    a = false;
  }
}

emailField.addEventListener('keyup', onInput);


function passValidation() {
  if (password.value.length === 0) {
    password.style.borderColor = 'red';
    errorpass.style.display = 'initial';
    preheaderpass.style.color = 'red';
    errorpass2.style.display = 'none';
    b = false;
  } else if (password.value.length > 0 && password.value.length <= 8) {
    password.style.borderColor = 'red';
    errorpass2.style.display = 'initial';
    preheaderpass.style.color = 'red';
    b = false;
  } else {
    password.style.borderColor = 'green';
    errorpass.style.display = 'none';
    errorpass2.style.display = 'none';
    preheaderpass.style.color = 'black';
    return (password);
    b = true;
  }
}

password.addEventListener('keyup', passValidation);


function checkboxValid() {
  if (!checkbox.checked === false) {
    checkbox.style.borderColor = 'black';
    errorpass3.style.display = 'none';
    c = true;
  } else {
    checkbox.style.borderColor = 'red';
    errorpass3.style.display = 'initial';
    c = false;
  }
}

checkbox.addEventListener('click', checkboxValid);


function formValidation() {
  if (a === true && b === true && c === true) {
    console.log(emailField);
    console.log(password);
  } else {
    console.log('Поля не заполнены!')
  }
}

btn.addEventListener('click', formValidation);

body {
  max-width: 1440px;
  max-height: 769px;
  background-color: #1B2473;
  display: flex;
  flex-direction: column;
  font-family: 'Roboto', sans-serif;
}

@media screen and (max-width:768px) {
  .body {
    max-width: 768px;
  }
}

.form {
  width: 600px;
  height: 412px;
  background: #FFFFFF;
  box-shadow: 0px 0px 40px 10px rgba(0, 0, 0, 0.25);
  border-radius: 20px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 82px;
  display: flex;
  flex-direction: column;
}

@media screen and (max-width: 768px) {
  .form {
    width: 728px;
    height: 697px;
  }
}

.form__preheader {
  font-weight: 700;
  font-size: 16px;
  line-height: 16px;
  color: #787878;
  margin-left: 45px;
  margin-bottom: 7px;
}

@media screen and (max-width:768px) {
  .form__preheader {
    font-size: 24px;
  }
}

.form__header {
  width: 115px;
  height: 50px;
  font-weight: 700;
  font-size: 50px;
  line-height: 50px;
  color: #787878;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0px;
  margin-top: 26px;
}

@media screen and (max-width:768px) {
  .form__header {
    width: 138px;
    font-size: 60px;
  }
}

.form__field {
  width: 509px;
  height: 49px;
  background: #FFFFFF;
  border: 2px solid #787878;
  border-radius: 10px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0px;
  font-weight: 700;
  font-size: 28px;
  line-height: 36px;
  color: #CCCCCC;
}

@media screen and (max-width:768px) {
  .form__field {
    width: 638px;
    height: 49px;
  }
}

.form__error {
  display: none;
  font-weight: 500;
  font-size: 10px;
  line-height: 16px;
  color: #CB2424;
  margin-left: 45px;
  margin-right: auto;
  margin-bottom: 12px;
}

.form__star {
  width: 7px;
  height: 12px;
  color: #787878;
}

.form__pc {
  width: 638px;
  height: fir-content;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.form__box {
  width: 24px;
  height: 24px;
  border: 2px solid #787878;
  border-radius: 7px;
  margin-left: 45px;
  margin-right: 10px;
}

@media screen and (max-width:768px) {
  .form__box {
    width: 32px;
    height: 32px;
  }
}

.form__checkbox {
  width: 100%;
  display: flex;
  flex-direction: row;
}

.form__text {
  width: 278px;
  height: 16px;
  font-weight: 400;
  font-size: 14px;
  line-height: 16px;
  color: #787878;
  margin-top: 3px;
}

@media screen and (max-width:768px) {
  .form__text {
    width: 358px;
    font-size: 18px;
  }
}

.form__send {
  width: 180px;
  height: 52px;
  background-color: #1A226B;
  border-radius: 10px;
  font-weight: 700;
  font-size: 24px;
  line-height: 16px;
  color: #FFFFFF;
  margin-left: auto;
  margin-right: auto;
  margin-top: 26px;
}

@media screen and (max-width:768px) {
  .form__send {
    width: 220px;
    height: 80px;
    font-size: 32px;
  }
}

<!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">
  <link rel="stylesheet" href="../module_two_javascript/normalize.css">
  <link rel="stylesheet" href="../module_two_javascript/style.css">
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=Roboto&display=swap" rel="stylesheet">
  <title>Form</title>
</head>

<body>

  <form class="form" id='form'>

    <h1 class="form__header">Вход</h1>
    <p class="form__preheader" id='preheader'>E-mail</p>
    <input class="form__field" type="text" id="e-mail" placeholder="Введите e-mail">
    <p class="form__error" id='error'>Поле обязательно для заполнения</p>
    <p class="form__preheader" id='preheaderpass'>Пароль</p>
    <input class="form__field" type="text" id="password" placeholder="Введите пароль">
    <p class="form__error" id='errorpass'>Поле обязательно для заполнения</p>
    <p class="form__error" id='errorpass2'>Пароль должен содержать как минимум 8 символов</p>

    <div class="form__pc">
      <div class=f orm__checkbox>
        <input class="form__box" type="checkbox" id="box" value='check'>
        <label for="box" class="form__text">Я согласен получать обновления на почту
        </label>
      </div>
      <p class="form__error" id='errorpass3'>Поле обязательно для заполнения</p>
    </div>

    <button class="form__send" id='btn' type="submit">
            Войти
    </button>
    <script src="..."></script>
</body>

</html>

2 个回答

Voted

Andrey Semykin · Answer 1 · 2022-08-15T23:21:22Z

对 b 的赋值是在 return 之后，所以没有执行。

'use strict'

const emailChecker = /^(([^<>()[\].,;:\s@"]+(\.[^<>()[\].,;:\s@"]+)*)|(".+"))@(([^<>()[\].,;:\s@"]+\.)+[^<>()[\].,;:\s@"]{2,})$/iu;


const errorIsOn = document.querySelector('#error');
const preheader = document.querySelector('#preheader');
const emailField = document.querySelector('#e-mail');
const btn = document.querySelector('#btn');
const password = document.querySelector('#password');
const errorpass = document.querySelector('#errorpass');
const errorpass2 = document.querySelector('#errorpass2');
const preheaderpass = document.querySelector('#preheaderpass');
const checkbox = document.querySelector('#box');
const errorpass3 = document.querySelector('#errorpass3');

let a = false;
let b = false;
let c = false;

function isEmailValid(value) {
  return emailChecker.test(value);
}

function onInput() {
  if (isEmailValid(emailField.value)) {
    emailField.style.borderColor = 'green';
    errorIsOn.style.display = 'none';
    preheader.style.color = 'black';
    a = true;
  } else {
    emailField.style.borderColor = 'red';
    errorIsOn.style.display = 'initial';
    preheader.style.color = 'red';
    a = false;
  }
}

emailField.addEventListener('change', onInput);


function passValidation() {
  if (password.value.length === 0) {
    password.style.borderColor = 'red';
    errorpass.style.display = 'initial';
    preheaderpass.style.color = 'red';
    errorpass2.style.display = 'none';
    b = false;
  } else if (password.value.length > 0 && password.value.length <= 8) {
    password.style.borderColor = 'red';
    errorpass2.style.display = 'initial';
    preheaderpass.style.color = 'red';
    b = false;
  } else {
    password.style.borderColor = 'green';
    errorpass.style.display = 'none';
    errorpass2.style.display = 'none';
    preheaderpass.style.color = 'black';
    b = true; // стояло ПОСЛЕ return
    return (password);

  }
}

password.addEventListener('change', passValidation);


function checkboxValid() {
  if (!checkbox.checked === false) {
    checkbox.style.borderColor = 'black';
    errorpass3.style.display = 'none';
    c = true;
  } else {
    checkbox.style.borderColor = 'red';
    errorpass3.style.display = 'initial';
    c = false;
  }
}

checkbox.addEventListener('click', checkboxValid);


function formValidation() {
  if (a === true && b === true && c === true) {
    console.log(emailField.value);
    console.log(password.value);
  } else {
    console.log('Поля не заполнены!')
  }
}

btn.addEventListener('click', formValidation);

body {
  max-width: 1440px;
  max-height: 769px;
  background-color: #1B2473;
  display: flex;
  flex-direction: column;
  font-family: 'Roboto', sans-serif;
}

@media screen and (max-width:768px) {
  .body {
    max-width: 768px;
  }
}

.form {
  width: 600px;
  height: 412px;
  background: #FFFFFF;
  box-shadow: 0px 0px 40px 10px rgba(0, 0, 0, 0.25);
  border-radius: 20px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 82px;
  display: flex;
  flex-direction: column;
}

@media screen and (max-width: 768px) {
  .form {
    width: 728px;
    height: 697px;
  }
}

.form__preheader {
  font-weight: 700;
  font-size: 16px;
  line-height: 16px;
  color: #787878;
  margin-left: 45px;
  margin-bottom: 7px;
}

@media screen and (max-width:768px) {
  .form__preheader {
    font-size: 24px;
  }
}

.form__header {
  width: 115px;
  height: 50px;
  font-weight: 700;
  font-size: 50px;
  line-height: 50px;
  color: #787878;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0px;
  margin-top: 26px;
}

@media screen and (max-width:768px) {
  .form__header {
    width: 138px;
    font-size: 60px;
  }
}

.form__field {
  width: 509px;
  height: 49px;
  background: #FFFFFF;
  border: 2px solid #787878;
  border-radius: 10px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0px;
  font-weight: 700;
  font-size: 28px;
  line-height: 36px;
  color: #CCCCCC;
}

@media screen and (max-width:768px) {
  .form__field {
    width: 638px;
    height: 49px;
  }
}

.form__error {
  display: none;
  font-weight: 500;
  font-size: 10px;
  line-height: 16px;
  color: #CB2424;
  margin-left: 45px;
  margin-right: auto;
  margin-bottom: 12px;
}

.form__star {
  width: 7px;
  height: 12px;
  color: #787878;
}

.form__pc {
  width: 638px;
  height: fir-content;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.form__box {
  width: 24px;
  height: 24px;
  border: 2px solid #787878;
  border-radius: 7px;
  margin-left: 45px;
  margin-right: 10px;
}

@media screen and (max-width:768px) {
  .form__box {
    width: 32px;
    height: 32px;
  }
}

.form__checkbox {
  width: 100%;
  display: flex;
  flex-direction: row;
}

.form__text {
  width: 278px;
  height: 16px;
  font-weight: 400;
  font-size: 14px;
  line-height: 16px;
  color: #787878;
  margin-top: 3px;
}

@media screen and (max-width:768px) {
  .form__text {
    width: 358px;
    font-size: 18px;
  }
}

.form__send {
  width: 180px;
  height: 52px;
  background-color: #1A226B;
  border-radius: 10px;
  font-weight: 700;
  font-size: 24px;
  line-height: 16px;
  color: #FFFFFF;
  margin-left: auto;
  margin-right: auto;
  margin-top: 26px;
}

@media screen and (max-width:768px) {
  .form__send {
    width: 220px;
    height: 80px;
    font-size: 32px;
  }
}

<!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">
  <link rel="stylesheet" href="../module_two_javascript/normalize.css">
  <link rel="stylesheet" href="../module_two_javascript/style.css">
  <link rel="preconnect" href="https://fonts.googleapis.com">
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
  <link href="https://fonts.googleapis.com/css2?family=Roboto&display=swap" rel="stylesheet">
  <title>Form</title>
</head>

<body>

  <form class="form" id='form'>

    <h1 class="form__header">Вход</h1>
    <p class="form__preheader" id='preheader'>E-mail</p>
    <input class="form__field" type="text" id="e-mail" placeholder="Введите e-mail">
    <p class="form__error" id='error'>Поле обязательно для заполнения</p>
    <p class="form__preheader" id='preheaderpass'>Пароль</p>
    <input class="form__field" type="text" id="password" placeholder="Введите пароль">
    <p class="form__error" id='errorpass'>Поле обязательно для заполнения</p>
    <p class="form__error" id='errorpass2'>Пароль должен содержать как минимум 8 символов</p>

    <div class="form__pc">
      <div class=f orm__checkbox>
        <input class="form__box" type="checkbox" id="box" value='check'>
        <label for="box" class="form__text">Я согласен получать обновления на почту
        </label>
      </div>
      <p class="form__error" id='errorpass3'>Поле обязательно для заполнения</p>
    </div>

    <button class="form__send" id='btn' type="submit">
            Войти
    </button>
    <script src="..."></script>
</body>

</html>

Kolamik · Answer 2 · 2022-08-18T00:57:02Z

Best Answer

Kolamik

2022-08-18T00:57:02Z2022-08-18T00:57:02Z

最后我解决了这样的问题：

JS：

function formValidation(evt) { 

  if (a === true && b === true && c === true) {

    evt.preventDefault();  // добавила отмену события по умолчанию и только затем вывела в консоль нужные мне значения полей.

    console.log(emailField.value);
    console.log(password.value);
  } 
}


btn.addEventListener('click', formValidation);

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