GIF/IMG 未从 DOM 中删除（不是函数？）

问题描述 投票：0回答：1

所以我正在继续我的测验应用程序，我之前的问题让我深入了解集合如何不能使用

.remove()
。我想我的第二个问题是，我最近在让徽标做同样的事情时遇到了几个问题。如果循环不起作用且默认调用不起作用，如何从 DOM 中删除徽标图像。

我尝试在容器上使用

.removeChild
，我还尝试通过执行
logoLoop.parentNode.removeChild(logoLoop);
来间接做到这一点，这两件事都导致
.remove()
和
.removeChild()

都不是函数错误

在尝试访问删除功能时，我没有意识到我更改了徽标的 html，以便视频不再是 .mp4，现在是带有 GIF 的 

<img>
标签。没有什么区别。

有没有办法从 DOM 中完全删除图像？

const startButton = document.getElementById("start");
const allButtons = document.querySelectorAll('.button-56');
const buttonGrid = document.getElementsByClassName("grid");
const logoLoop = [document.getElementsByClassName("Logo")];
var container = document.getElementsByClassName("Container");


addGlobalEventListener("click", ".button-56", e => {
  startGame();
})

//Global Listener
function addGlobalEventListener(type, selector, callback) {
  document.addEventListener(type, e => {
    if (e.target.matches(selector)) callback(e)
  })
}

//Will use start game to remove button collection and logo this is where the error occurs. Buttons go away but not logo.
function startGame() {
  [...buttonGrid].forEach(button => button.remove());
  [...container].forEach(img => img.remove());
}
.container {
  background: white cover;
  height: 100vh;
  width: 100%;
  display: grid;
}

.grid {
  display: grid;
  grid-auto-flow: row;
  margin: auto;
  gap: 1em;
  text-align: center;
  transition: all ease-in-out 0.6s;
}

.ButtonS:hover {
  transform: scale(1.2);
}

.ButtonC:hover {
  transform: scale(1.2);
}

.ButtonQ:hover {
  transform: scale(1.2);
}

.ButtonS {
  background: white;
  padding: 1em;
  border-radius: 30px;
  transition: all 0.2s ease-in-out;
}

.ButtonC {
  background: white;
  padding: 1em;
  border-radius: 30px;
  transition: all 0.2s ease-in-out;
}

.ButtonQ {
  background: white;
  padding: 1em;
  border-radius: 30px;
  transition: all 0.2s ease-in-out;
}

.button-56 {
  align-items: center;
  background-color: rgb(74, 227, 36);
  border: 2px solid #111;
  border-radius: 8px;
  box-sizing: border-box;
  color: #111;
  cursor: pointer;
  display: flex;
  font-size: 16px;
  height: 48px;
  justify-content: center;
  line-height: 24px;
  max-width: 100%;
  padding: 0 25px;
  position: relative;
  text-align: center;
  text-decoration: none;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.button-56:after {
  background-color: #111;
  border-radius: 8px;
  content: "";
  display: block;
  height: 48px;
  left: 0;
  width: 100%;
  position: absolute;
  top: -2px;
  transform: translate(8px, 8px);
  transition: transform .2s ease-out;
  z-index: -1;
}

.button-56:hover:after {
  transform: translate(0, 0);
}

.button-56:active {
  background-color: #ffdeda;
  outline: 0;
}

.button-56:hover {
  outline: 0;
}

@media (min-width: 768px) {
  .button-56 {
    padding: 0 40px;
  }
}

.splash-header {
  color: white;
  transition: all ease-in-out 0.6s;
}

.splash-header:hover {
  transform: scale(1.5);
}

.frontlogo {
  height: 90%;
  color: white;
  display: flex;
  justify-content: center;
  align-content: center;
}

.Logo {
  display: flex;
  border-radius: 50%;
  max-height: 300px;
  justify-content: center;
  align-content: center;
  margin: auto;
  transition: all 2s ease;
}
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>QuiZA</title>
  <link rel="stylesheet" href="css/style.css" />
  <script src="js\app.js"></script>
</head>

<body>
  <div class="container">
    <h1 class="frontlogo">QuiZA Logo </h1>
    <img src="assets\r1Logo.gif" alt="" class="Logo">
    <div class="grid">
      <button id="start" class="button-56" role="button">Start</button>
      <button class="button-56" role="button">Quiz List</button>
      <button class="button-56" role="button">Contact</button>
    </div>
    <!--Loading screen will start after this-->
    <div class="splash">
      <h1 class="splash-header">Press Here...</h1>
    </div>
  </div>

</body>

</html>

javascript html css gif removechild
1个回答
0
投票

logoLoop
是一个包含 
NodeList
的数组。没有理由将其包装在数组中。您应该像您创建的其他集合一样定义和使用它。

const logoLoop = document.querySelectorAll(".Logo")];
//...

logoLoop.forEach(logo => logo.remove());

顺便说一句，如果您使用 

querySelectorAll()
创建所有集合，则无需使用 
[...variable]
来循环它们。 
querySelectorAll()
返回的集合实现了
.forEach()
。

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