classList.add() 不工作 | 香草 JavaScript

Question

我的網頁中有一個元素在 URL 參數更改時被刪除。 一個元素應該顯示，另一個應該消失。 我的嘗試是使用classList.add()和classList.remove()更改 class 。 應該工作的代碼：

        if (pageType === "signup") {
            console.log ("signup")
            signupConfirm.classList.remove ("hidden");//doesn't seem to work
            questionConfirm.classList.add ("hidden"); 
//triger function
            signupConfirmCode()
        }

        else {
            console.log ("hello")
        }

在此處查看問題： https://cheerful-sable-4fff28.netlify.app/sucuss.html?page-type=signup

所有代碼：HTML/JS

<!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">
    <title>Succes | The Coders Club</title>
    <link rel="icon" href="img_2.jpg">
    <link rel="stylesheet" href="Styles.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=Montserrat:wght@300&family=Poppins:wght@300&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="info_styles.css">
</head>
<body>
    
    <div class="nav-bar">
        <nav>
            <a href="index.html"><img src="img_2.jpg" class="nav-img"></a>
            <div class="nav-options">
                <button class="nav-option">About Us</button>
                <button class="nav-option">Classes</button>
                <button class="nav-option">Contact Us</button>
            </div>
        </nav>
    </div>
    <div class="welcome" id="question-confirm">
        <div class="success" style="height: 50%; position:absolute; bottom: 200px;">
    <h1>Your Question is in!</h1>
    <p>For your reference, this is what you wrote:</p>
    <div id="wrote"></div>
   <h2>While you wait why not?</h2>
   <button class="standard-button" style="width: 250px; height: 50px;">Check out our classes</button><br><br>
   <button class="standard-button" style="width: 250px; height: 50px;">Read the about us page</button><br><br>
   <button class="standard-button" style="width: 250px; height: 50px;">Head to our homepage</button><br><br>
    </div>

    <div class="signup hidden welcome" id="signup-confirm">
        <div class="success">
            <h1>Success! Your child(ren) enrolled!</h1>
            <p>A conformation will be sent to your email address. For your refernce below are the detials you entered into the signup form. If you need to change <strong>any</strong> of these details please contact me.</p>
            <div class="signup-infomation">
                <h2>Parent Name</h2>
                <li id="parent-name-confirm">Error no parent name</li>
                <h2>Student Name(s)</h2>
                <li id="student-names">Error no student(s) name</li>
                <h2>Parent Email Address</h2>
                <li id="email-confirm">Error no parent email address found</li>
                <h2>Parent Phone Number</h2>
                <li id="parent-phone">Error no parent name</li><br><br>
                <p>This info is very important. It may be a good idea to bookmark or</p>
                <button class="standard-button" onclick="window.print();">Print this info</button><br><br>  
            </div>
            <h3>Please remeber to bring <span id="confirm-price">$39</span> cash to pay Ethan.</h3>
        </div>
    </div>
    <script>
        var signupConfirm = document.getElementById ("signup-confirm");
        
        var questionConfirm = document.getElementById ("question-confirm");
        console.log (signupConfirm)
        const urlParams = new URLSearchParams(window.location.search);
        var pageType = urlParams.get("page-type");
        var signupConfirmCode = function () {
            var parentNameConfirm = document.getElementById ("parent-name-confirm");
            parentNameConfirm.textContent = localStorage.getItem("parent_name");
            var studentNamesConfirm = document.getElementById ("student-names");
            studentNamesConfirm.textContent = localStorage.getItem("child_names");
            var parentEmailConfirm = document.getElementById ("email-confirm");
            parentEmailConfirm.textContent = localStorage.getItem("email_confirm");
            var parentPhoneConfirm = document.getElementById ("parent-phone");
            parentPhoneConfirm.textContent = localStorage.getItem("parent_phone");
            
        };
        if (pageType === "signup") {
            console.log ("signup")
            signupConfirm.classList.remove ("hidden");
            questionConfirm.classList.add ("hidden")
            signupConfirmCode()
        }

        else {
            console.log ("hello")
        }
    </script>
    <script>
        var wrote = document.getElementById ("wrote");
        wrote.innerHTML = sessionStorage.getItem ("Tiny-Data")
    </script>
</body>
</html>

CSS

body {
    overflow-x: hidden;
    font-size: large;
    margin: 0;
}

.welcome {
    text-align: center;
    background-image: url("img_1.jpg");
    background-size: cover;
    background-repeat: no-repeat;
    height: 95vh;
    color: white;
    position: absolute;
    top: 100px;
    min-width: 100%;
    padding: 0 auto;
   
}

.welcome-txt {
    position: absolute;
    top: 40%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
}

.nav-bar {
    z-index: 98;
    background-color: rgba(204, 204, 204, 0.8);
    padding: 15px;

}

.nav-img {
    height: 100px;
}

.nav-options {
    float: right;
    padding-right: 50px;
}

.nav-option {
    border: none;
    background-color: rgba(204, 204, 204, 0.1);
    height: 100px;
    width: 150px;
    font-size: large;
    cursor: pointer;
    transition: all 0.5s ease-out;
    position: relative;
    bottom: 15px;

}

.nav-option:hover {
    background-color: rgba(204, 204, 204, 0.1);
    color: white;
}

p, ul, ol, li, select {
    font-family: 'Poppins', sans-serif;
}

footer {
    position: absolute;
    top: 3000px;
    width: 100%;
}

.footer-list {  
    list-style: none;   
}

.footer-secetion {
    position: absolute;
    bottom: 200px;
    text-align: center;
}

.content {
    position: absolute;
    top: 1200px;
    text-align: center;
    margin-left: 30%;
}

input {
    height: 30px;
    width: 300px;
}

::placeholder {
    text-align: center;
     font-family: 'Poppins', sans-serif;
}

textarea {
   resize: none;
    width: 700px;
    height: 400px;
}

.standard-button {
    background-color: rgb(16, 92, 116);
    color: white;
    border: none;
    border-radius: 5px;
    height: 30px;
    width: 150px;
    font-size: medium;
    cursor: pointer;
    transition: all 0.5s ease-out;
}

.standard-button:hover {
 
    width: 175px;
    height: 40px;
    
}

.hidden {
    display: none;
}



.info-content {
    position: absolute;
    top: 1075px;
    text-align: center;
    background-image: url("img_5.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    width: 100%;
}

.info-content-blocks {
    background-color: rgba(204, 204, 204, 0.8);
    margin: 30px;
    padding: 30px; 
}

.diveder {
width: 100%;
height: 100px;
background-color: rgba(204, 204, 204, 0.8);
padding-top: 2%;
padding-bottom: 1%;
}

.success {
    background-color: rgba(255, 255, 255, 0.808);
    margin-left: 1.75%;
    padding: 30px;
    height: 80%;
    position: absolute;
    bottom: 100px;
    color: black;
    width: 93%;
}

.signup-infomation {
    border: 1px solid;
    width: 45%;
    position: relative;
    left: 25%;
    overflow-y: hidden;
    overflow-x: scroll;
}

select {
width: 150px;
height: 35px;
font-size: medium;

}

.line {
    width: 50px;
    background-color: white;
    z-index: 99;
    height: 0.5px;
}

.hamburger-menu {
    background-color: transparent;
    border: none;
    position: absolute;
    left: 85%;
    top: 30px;
}

.mobile-nav {
    display: none;
}

.mobile-menu {
    margin: 50px;
    padding: 0;
    z-index: 98;
    position: fixed;
    right: 0%;
    bottom: -6%;
    background-color:rgba(204, 204, 204, 0.8);
    width: 100%;
    height: 110%;
    margin-left:auto;
    margin-right:auto;
    padding: 50px;
}

.mobile-options {
    position: absolute;
    list-style: none;
    top: 0;
    width: 100%;
    display: flex;
  justify-content: center;
  flex-direction: column;
  height: 110%;
  
}

.mobile-option {
    width: 100%;
    height: 50px;
    font-size: large;
    letter-spacing: 2px; 
    line-height: 100%;
    text-align: center;
    background-color: rgba(204, 204, 204, 0.8);
    border: none;
    padding-right: 60px;
    
}

.exit-btn {
    width: 50px;
    background-color: transparent;
    border: none;
    font-size: 4rem;
    color: white;
    font-family: 'Montserrat', sans-serif;
    font-weight: lighter;
    float: right;
    position: absolute;
    bottom: 75%;
    left: 75%;
}


.fade-out {
    opacity: 0;
    transition: all 3000ms ease-in-out;
}

.fade-in {
    opacity: 1;
    transition: all 3000ms ease-in-out;
}

.arrow
{
  position: relative;
  bottom: -2rem;
  left: 50%;
  margin-left:-20px;
  width: 40px;
  height: 40px;

  /**
   * Dark Arrow Down
   */
  background-image: url(data:image/svg+xml;base64,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);
  background-size: contain;
}

.bounce {
  animation: bounce 2s infinite;
}

.arrow-background {
    background-color: rgba(204, 204, 204, 0.8);
    min-width: 100px;
    padding: 25px;
    border-radius: 100px;
    margin: 0;
    position: absolute;
    top: 80%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);

}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-30px);
  }
  60% {
    transform: translateY(-15px);
  }
}

@media print { 
    .nav-bar {
        display: none;
    }
    
    .standard-button {
        display: none;
    }

    p {
        display: none;
    }
 }

 @media screen and (max-width: 830px) {
        .desktop-nav {
            display: none;
        }

        .mobile-nav {
            display: inline-block;
        }
 }

Answer 1

您的問題是 HTML，您的#question-confirm似乎缺少結束標記。
您需要添加缺少的</div> 。
這就是使#signup-confirm出現在#question-confirm中的原因。

classList.add() 不工作 | 香草 JavaScript

問題描述

1 個解決方案

解決方案1
1 2022-09-25 18:18:37

classList.add() 不工作 | 香草 JavaScript

問題描述

1 個解決方案

解決方案1 1 2022-09-25 18:18:37

解決方案1
1 2022-09-25 18:18:37