我正在尝试创建一个微调器，但我的代码无法正常工作

问题描述 投票：0回答：1

我正在尝试创建一个在网络调用期间旋转的旋转器，但它不起作用。我尝试使用 classList add 方法来添加/删除设置了 display 

:hidden
属性的隐藏类。

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Meme Generator</title>
    <link rel="icon" type="image/x-icon" href="/TrollFace.png">
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="wrapper">
    <div class="container">
        <header>
            <h1>Meme Generator</h1>
        </header>
        <main>
            <button class="button-5" id="generateMemeBtn" role="button">Generate Meme</button>
            <div id="memeContainer">
                <div id="loadingSpinner" class="spinner hidden"></div>
                <h1>Hello there👋 !!</h1>
                <img src="./hi-hello.gif" alt="">
            </div>
        </main>
    </div>
</div>
    <script src="script.js"></script>
</body>
</html>

CSS

body {
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #e9ecef;
    margin: 0;
}

.container {
    text-align: center;
    background-color:#f8f9fa;
    padding: 40px;
    border-radius: 4px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    height:75%;
    width: 90%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header {
    margin-bottom: 20px;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
    color: #212529;
}

.button-5 {
    margin: 10px;
    align-items: center;
    background-clip: padding-box;
    background-color: #d00000;
    border: 1px solid transparent;
    border-radius: .25rem;
    box-shadow: rgba(0, 0, 0, 0.02) 0 1px 3px 0;
    box-sizing: border-box;
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    font-family: system-ui,-apple-system,system-ui,"Helvetica Neue",Helvetica,Arial,sans-serif;
    font-size: 16px;
    font-weight: 600;
    justify-content: center;
    line-height: 1.25;
    min-height: 3rem;
    padding: calc(.875rem - 1px) calc(1.5rem - 1px);
    position: relative;
    text-decoration: none;
    transition: all 250ms;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    vertical-align: baseline;
    width: auto;
  }
  
  .button-5:hover {
    background-color: #d00000;
    box-shadow: rgba(255, 255, 255, 0.4) 0 4px 12px;
  }
  
  .button-5:hover {
    transform: translateY(-1px);
  }
  
  .button-5:active {
    background-color: #9c0404;
    box-shadow: rgba(0, 0, 0, .06) 0 2px 4px;
    transform: translateY(0);
  }

#memeContainer {
    margin-top: 20px;
    position: relative;
    min-height: 200px;
    height: 60vh;
    width: 38vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #212529;

}

#memeContainer img {
    max-width: 100%;
    max-height: 90%;
    border-radius: 5px;
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.3);
}

.spinner {
    position:absolute;
    top: 50%;
    left: 50%;
    z-index: 100;
    width: 48px;
    height: 48px;
    border: 5px solid #FFF;
    border-bottom-color: #FF3D00;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
   
}

.hidden{
    display: none;
}


@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
    }

JS

document.addEventListener('DOMContentLoaded', () => {
    const generateMemeBtn = document.getElementById('generateMemeBtn');
    const memeContainer = document.getElementById('memeContainer');
    const loadingSpinner = document.getElementById('loadingSpinner');

    generateMemeBtn.addEventListener('click', memeApi);

    function memeApi()
   {

    loadingSpinner.classList.remove('hidden');
    console.log(loadingSpinner.className)
    memeContainer.innerHTML = '';

    const url = 'https://meme-api.com/gimme/15';

    fetch(url)
        .then(data => data.json() )
        .then(data => {
            const memes = data;
            const randomIndex = Math.floor(Math.random() * memes.count);
            const meme = memes.memes[randomIndex];
            


            loadingSpinner.classList.add('hidden');
            memeContainer.innerHTML = `
                <h2>${meme.title}</h2>
                <img src="${meme.url}" alt="${meme.author}">
            `;
        })
        .catch(error => {
            console.error('Error fetching meme:', error);
            loadingSpinner.classList.add('hidden');
            memeContainer.innerHTML = '<p>Sorry, something went wrong. Please try again later.</p>';
        });


   } 
});

我期待一个滑块在 API 获取期间旋转，然后消失。当结果出来的时候。

javascript html css dom
1个回答
2
投票

您需要做的就是将微调器 div 移到容器 div 之外，这样微调器在加载时就不会被 meme 替换。

document.addEventListener('DOMContentLoaded', () => {
    const generateMemeBtn = document.getElementById('generateMemeBtn');
    const memeContainer = document.getElementById('memeContainer');
    const loadingSpinner = document.getElementById('loadingSpinner');

    generateMemeBtn.addEventListener('click', memeApi);

    function memeApi()
   {

    loadingSpinner.classList.remove('hidden');
    console.log(loadingSpinner.className)
    memeContainer.innerHTML = '';

    const url = 'https://meme-api.com/gimme/15';

    fetch(url)
        .then(data => data.json() )
        .then(data => {
            const memes = data;
            const randomIndex = Math.floor(Math.random() * memes.count);
            const meme = memes.memes[randomIndex];
            


            loadingSpinner.classList.add('hidden');
            memeContainer.innerHTML = `
                <h2>${meme.title}</h2>
                <img src="${meme.url}" alt="${meme.author}">
            `;
        })
        .catch(error => {
            console.error('Error fetching meme:', error);
            loadingSpinner.classList.add('hidden');
            memeContainer.innerHTML = '<p>Sorry, something went wrong. Please try again later.</p>';
        });


   } 
});
body {
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #e9ecef;
    margin: 0;
}

.container {
    text-align: center;
    background-color:#f8f9fa;
    padding: 40px;
    border-radius: 4px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    height:75%;
    width: 90%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header {
    margin-bottom: 20px;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
    color: #212529;
}

.button-5 {
    margin: 10px;
    align-items: center;
    background-clip: padding-box;
    background-color: #d00000;
    border: 1px solid transparent;
    border-radius: .25rem;
    box-shadow: rgba(0, 0, 0, 0.02) 0 1px 3px 0;
    box-sizing: border-box;
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    font-family: system-ui,-apple-system,system-ui,"Helvetica Neue",Helvetica,Arial,sans-serif;
    font-size: 16px;
    font-weight: 600;
    justify-content: center;
    line-height: 1.25;
    min-height: 3rem;
    padding: calc(.875rem - 1px) calc(1.5rem - 1px);
    position: relative;
    text-decoration: none;
    transition: all 250ms;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
    vertical-align: baseline;
    width: auto;
  }
  
  .button-5:hover {
    background-color: #d00000;
    box-shadow: rgba(255, 255, 255, 0.4) 0 4px 12px;
  }
  
  .button-5:hover {
    transform: translateY(-1px);
  }
  
  .button-5:active {
    background-color: #9c0404;
    box-shadow: rgba(0, 0, 0, .06) 0 2px 4px;
    transform: translateY(0);
  }

#memeContainer {
    margin-top: 20px;
    position: relative;
    min-height: 200px;
    height: 60vh;
    width: 38vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #212529;

}

#memeContainer img {
    max-width: 100%;
    max-height: 90%;
    border-radius: 5px;
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.3);
}

.spinner {
    position:absolute;
    top: 50%;
    left: 50%;
    z-index: 100;
    width: 48px;
    height: 48px;
    border: 5px solid #FFF;
    border-bottom-color: #FF3D00;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
   
}

.hidden{
    display: none;
}


@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
} 
<div class="wrapper">
  <div class="container">
    <header>
      <h1>Meme Generator</h1>
    </header>
    <main>
      <button class="button-5" id="generateMemeBtn" role="button">Generate Meme</button>
      <div id="memeContainer">
        <h1>Hello there👋 !!</h1>
        <img src="./hi-hello.gif" alt="">
      </div>
      <!-- Move your spinner out of the "memeContainer", so it doesn't get replaced by the meme -->
      <div id="loadingSpinner" class="spinner hidden"></div>
    </main>
  </div>
</div>

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