表单验证后打开新页面 JavaScript

Question

我想在验证我的 form.There 后打开一个新页面，验证它没有问题。但是我的表单从未提交，我想重定向到我的表单的 html 页面是打不开，在 validation.Im 尝试在 addEventListener 中执行此操作后，它卡在同一页面中。用户单击提交按钮后，它应该打开我想要的页面，但我无法解决问题我的 html 代码...

<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">
    <title>Form Validation</title>
    <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=Poppins:wght@400;700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="./style.css">
    <script defer src="./index.js"></script>
</head>
<body>
    <div class="container">
        <form id="form" action="/">
            <h1>Registration</h1>
            <div class="input-control">
                <label for="username">Username</label>
                <input id="username" name="username" type="text">
                <div class="error"></div>
            </div>
            <div class="input-control">
                <label for="email">Email</label>
                <input id="email" name="email" type="text">
                <div class="error"></div>
            </div>
            <div class="input-control">
                <label for="myArea">Subject</label>
                <textarea  name="myArea" id="myArea"rows="10" cols="45"  placeholder="Please enter your thoughts on this.."></textarea>
                <div class="error"></div>
            </div>

            <button type="submit" id="buton" name="buton" >Sign Up</button>
        </form>
    </div>
</body>
</html>

我的 javascript 代码..

const form = document.getElementById('form');
const username = document.getElementById('username');
const email = document.getElementById('email');
const myArea = document.getElementById('myArea');
var isValid1=false;
var isValid2=false;
var isValid3=false;

form.addEventListener('submit', e => {
    e.preventDefault();

    validateInputs();
    if(isValid1 && isValid2 && isValid3){
        this.submit();
        window.location("action.html");
      }
});


const setError = (element, message) => {
    const inputControl = element.parentElement;
    const errorDisplay = inputControl.querySelector('.error');

    errorDisplay.innerText = message;
    inputControl.classList.add('error');
    inputControl.classList.remove('success')
}

const setSuccess = element => {
    const inputControl = element.parentElement;
    const errorDisplay = inputControl.querySelector('.error');

    errorDisplay.innerText = '';
    inputControl.classList.add('success');
    inputControl.classList.remove('error');
};

const isValidEmail = email => {
    const re = /^(([^<>()[\]\.,;:\s@"]+(\.[^<>()[\]\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(String(email).toLowerCase());
}

const validateInputs = () => {
    const usernameValue = username.value.trim();
    const emailValue = email.value.trim();
    const myAreaValue = myArea.value;
    
    if(usernameValue === '') {
        isValid1=false;
        setError(username, 'Name is required');
        
    } else {
        isValid1=true;
        setSuccess(username);
        
    }

    if(emailValue === '') {
        isValid2=false;
        setError(email, 'Email is required');
        
    } else if (!isValidEmail(emailValue)) {
        isValid2=false;
        setError(email, 'Please enter a valid email');
        
    } else {
        isValid2=true;
        setSuccess(email);
    }

    if(myAreaValue === '') {
        isValid3=false;
        setError(myArea, 'Subject is required');
        
    }else {
        isValid3=true;
        setSuccess(myArea);
    }
};

Answer 1

将您的 eventListener 替换为：

form.addEventListener('submit', e => {
    e.preventDefault();

    validateInputs();
    if(isValid1 && isValid2 && isValid3){
        form.submit();
        window.location("action.html");
      }
});

submit() 函数必须由表单调用。

在此处查看文档：https://www.w3schools.com/jsref/met_form_submit.asp

Answer 2

您还应注意 window.location("action.html")，因为 window.location 不是函数，请尝试 window.location.href = "action.html";。有关更多示例，请参阅 this answer。

表单验证后打开新页面 JavaScript

Open A New Page After Form Validation JavaScript

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