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通過(guò)點(diǎn)擊打開菜單無(wú)法正常工作

CSS

我正試圖重建蘋果網(wǎng)站。

HTML結(jié)構(gòu):

<!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">
        <link rel="stylesheet" href="styles/style.css">
        <link rel="stylesheet" href="styles/menu.css">
        <link rel="stylesheet" href="styles/header.css">
        <link rel="stylesheet" href="styles/page.css">




        <title>Apple</title>
    </head>
    <body>
        <header id="header">
            <div class="headerContent">
                <a class= "menuBtn"> 
                    <ion-icon name="menu-outline" class="logoImg"> </ion-icon>
                </a>
                <a href=""> 
                    <ion-icon name="logo-apple" class="logoImg"> </ion-icon>
                </a>
                <a href=""> 
                    <ion-icon name="bag-outline" class="logoImg"> </ion-icon>
                </a>

            </div>
        </header>

        <div class="menu">
            <div class="menuContent">
                <div class="menuInput">
                    <input type="text" placeholder="Search apple.com">
                </div>
                
                <div class="menuItem">
                    <a href="">Store</a>

                </div>
                
                <div class="menuItem">
                    <a href="">Mac</a>

                </div>
                <div class="menuItem">
                    <a href="">iPad</a>

                </div>
                
                <div class="menuItem">
                    <a href="">iPhone</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Watch</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Airpods</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Tv & Home</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Entertainment</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Accessories</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Support</a>
                    
                </div>


            </div>

        </div>

        <div class="list">
            <div class="listItem">
                <img src="image/list/macBookAir.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macBookPro.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/iMac.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macMini.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macStudio.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macPro.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/compare.PNG" alt="">
            </div>
          
        </div>

        <script type="module" src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.esm.js"></script>
        <script nomodule src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.js"></script>
        
    </body>
</html>

JavaScript代碼:

const menuBtn = document.querySelector('.menuBtn');
const menu = document.querySelector('.menu');
const header = document.querySelector('#header');

let IsMenuOpen = false;

menuBtn.addEventListener('click', () => {
    if(IsMenuOpen === false) {
        slideDown();
        header.backgroundColor = "black";
        IsMenuOpen = true;
    }else {
        slideUp();
        header.backgroundColor = "#333333";
        IsMenuOpen = false;
    }
})

function slideUp() {
    menu.style.transition = "all 0.5s ease-in-out";
    menu.style.height = "0px";

}
slideUp();

function slideDown() {
    menu.style.transition = "all 0.5s ease-in-out";
    menu.style.height = "100%";
    
}

然后有4個(gè)不同的css代碼。

這是菜單的css代碼

.menu {
position: absolute;
display: flex; /* disponde gli elementi sull asse principale x */
justify-content: center;
width: 100%;
height: 100%;
background-color: black;
overflow: hidden;
margin-top: -5px;}

.menuContent {
margin-top: 55px;
width: 80%}

.menuInput {
width: 100%;
display: flex;
justify-content: center;
border-bottom: 1px solid #424245;
padding-top: 7px;
padding-bottom: 10px;}

.menuInput input{
width: 95%;
height: 30px;
font-size: 18px;
padding: 5px;
background-color: #1d1d1f;
outline: none;
border: none;
border-radius: 10px;
color: white;}

.menuItem {
display:flex ;
align-items: center;
height: 7%;
font-size: 18px;
border-bottom: 1px solid #424245;}

.menuItem a {
text-decoration: none;
color: #9f9f9f;
transition: all ease 0.3s;}

.menuItem a:hover {
color: white;}

通過(guò)點(diǎn)擊左邊的一個(gè)按鈕，它應(yīng)該打開一個(gè)菜單，但它沒有。即使我不點(diǎn)擊，菜單也總是打開的。 如果我單擊它保持不變，我認(rèn)為JS代碼是正確的，因?yàn)槲覜]有得到任何錯(cuò)誤。

我覺得你需要把相關(guān)代碼放在DOMContentLoaded(DOMContentLoaded)里面。加載時(shí)menuBtn最初是未知的。

試試這個(gè):

window.addEventListener("DOMContentLoaded", (event) => {

  const menuBtn = document.querySelector('.menuBtn');
  const menu = document.querySelector('.menu');
  const header = document.querySelector('#header');

  let IsMenuOpen = false;

  menuBtn.addEventListener('click', () => {
      if(IsMenuOpen === false) {
          slideDown();
          header.backgroundColor = "black";
          IsMenuOpen = true;
      }else {
          slideUp();
          header.backgroundColor = "#333333";
          IsMenuOpen = false;
      }
  })

});

您的代碼正在工作，我認(rèn)為js文件沒有加載到您的html中，請(qǐng)確保您已經(jīng)& lt腳本src = & quotindex.js & quot/& gt；在html文件中(指向js或者只是在html中使用內(nèi)聯(lián)js，就像這樣:

<script>
 // your js here
</script>

const menuBtn = document.querySelector('.menuBtn');
const menu = document.querySelector('.menu');
const header = document.querySelector('#header');

let IsMenuOpen = false;

menuBtn.addEventListener('click', () => {
    if(IsMenuOpen === false) {
        slideDown();
        header.backgroundColor = "black";
        IsMenuOpen = true;
    }else {
        slideUp();
        header.backgroundColor = "#333333";
        IsMenuOpen = false;
    }
})

function slideUp() {
    menu.style.transition = "all 0.5s ease-in-out";
    menu.style.height = "0px";

}
slideUp();

function slideDown() {
    menu.style.transition = "all 0.5s ease-in-out";
    menu.style.height = "100%";
    
}

.menu {
position: absolute;
display: flex; /* disponde gli elementi sull asse principale x */
justify-content: center;
width: 100%;
height: 100%;
background-color: black;
overflow: hidden;
margin-top: -5px;}

.menuContent {
margin-top: 55px;
width: 80%}

.menuInput {
width: 100%;
display: flex;
justify-content: center;
border-bottom: 1px solid #424245;
padding-top: 7px;
padding-bottom: 10px;}

.menuInput input{
width: 95%;
height: 30px;
font-size: 18px;
padding: 5px;
background-color: #1d1d1f;
outline: none;
border: none;
border-radius: 10px;
color: white;}

.menuItem {
display:flex ;
align-items: center;
height: 7%;
font-size: 18px;
border-bottom: 1px solid #424245;}

.menuItem a {
text-decoration: none;
color: #9f9f9f;
transition: all ease 0.3s;}

.menuItem a:hover {
color: white;}

<!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">
        <link rel="stylesheet" href="styles/style.css">
        <link rel="stylesheet" href="styles/menu.css">
        <link rel="stylesheet" href="styles/header.css">
        <link rel="stylesheet" href="styles/page.css">




        <title>Apple</title>
    </head>
    <body>
        <header id="header">
            <div class="headerContent">
                <a class= "menuBtn"> 
                    <ion-icon name="menu-outline" class="logoImg"> </ion-icon>
                </a>
                <a href="#"> 
                    <ion-icon name="logo-apple" class="logoImg"> </ion-icon>
                </a>
                <a href="#"> 
                    <ion-icon name="bag-outline" class="logoImg"> </ion-icon>
                </a>

            </div>
        </header>

        <div class="menu">
            <div class="menuContent">
                <div class="menuInput">
                    <input type="text" placeholder="Search apple.com">
                </div>
                
                <div class="menuItem">
                    <a href="">Store</a>

                </div>
                
                <div class="menuItem">
                    <a href="">Mac</a>

                </div>
                <div class="menuItem">
                    <a href="">iPad</a>

                </div>
                
                <div class="menuItem">
                    <a href="">iPhone</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Watch</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Airpods</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Tv & Home</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Entertainment</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Accessories</a>
                    
                </div>
                
                <div class="menuItem">
                    <a href="">Support</a>
                    
                </div>


            </div>

        </div>

        <div class="list">
            <div class="listItem">
                <img src="image/list/macBookAir.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macBookPro.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/iMac.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macMini.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macStudio.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/macPro.PNG" alt="">
            </div>
            <div class="listItem">
                <img src="image/list/compare.PNG" alt="">
            </div>
          
        </div>

        <script type="module" src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.esm.js"></script>
        <script nomodule src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.js"></script>
        
    </body>
</html>