如何在 html css 和 js 中创建动画？

如何解决如何在 html css 和 js 中创建动画？

您好，我是一名新开发人员，正在尝试构建一个网站。网站的主要目标是向访问者提供一段文字。我的一些助手给了我一个 javascript 来复制 <p></p> 元素内的文本，并且它给出了文本被复制的自定义警报。但我需要一个动画/过渡，当我点击复制按钮时，自定义复制警报应该从左到右。

 var buttons = document.getElementsByClassName('copystatus');

for (let button of buttons) {
  button.addEventListener('click',function() {
     let statusElement = this.closest('.latestatus');
     let textTocopy = statusElement.getElementsByClassName('copytxt')[0].innerHTML;

    copyTextToClipboard(textTocopy);
    addcopyStatusAlert(this.parentNode);
  });
}

function copyTextToClipboard(text) {
  const copyText = document.createElement('textarea');
  copyText.style.position="absolute";
  copyText.style.display="none";
  copyText.value = text;

  document.body.appendChild(copyText);
  copyText.select();
  document.execCommand('copy');
  document.body.removeChild(copyText);
}

function addcopyStatusAlert(element) {
  if (!element.getElementsByClassName('status-copy-alert').length) {
    let copyAlertElement = document.createElement('span');
    copyAlertElement.classList.add('status-copy-alert')
    let copyMessage = document.createTextNode('copied!');
    copyAlertElement.appendChild(copyMessage);

    element.appendChild(copyAlertElement);
    setTimeout(function() {
      element.removeChild(copyAlertElement);
    },700);
  }
}

<div class="mainStatus">
   <h2 class="statusheading">Latest English Status</h2>
   <div class="allStatus">
    <div class="bock">
     <div class="latestatus">
      <p class="copytxt">Life is good when you have books</p>
      <div>
       <button class="copystatus btn">copy</button>
      </div>
     </div>
     <div class="latestatus">
      <p class="copytxt">Google is an open source library by Larry Page and Sergey Brin!</p>
      <div>
       <button class="copystatus btn">copy</button>
      </div>
     </div>
    </div>
    <div class="block">
     <div class="latestatus">
      <p class="copytxt">Cats are better than dogs.</p>
      <div>
       <button class="copystatus btn">copy</button>
      </div>
     </div>
     <div class="latestatus">
      <p class="copytxt">Cats are better than dogs.</p>
      <div>
       <button class="copystatus btn">copy</button>
      </div>
     </div>
    </div>
   </div>
  </div>

自定义警报是由 JavaScript 创建的 <span>。 比提前

解决方法

正如@A Haworth 在下面的评论中所建议的，是使用 css transformation 的代码片段。 我已将超时从 700 更新为 800，以使跨度保持更长的时间。

var buttons = document.getElementsByClassName('copystatus');

for (let button of buttons) {
  button.addEventListener('click',function() {
    let statusElement = this.closest('.latestatus');
    let textToCopy = statusElement.getElementsByClassName('copytxt')[0].innerHTML;

    copyTextToClipboard(textToCopy);
    addCopyStatusAlert(this.parentNode);
  });
}

function copyTextToClipboard(text) {
  const copyText = document.createElement('textarea');
  copyText.style.position = "absolute";
  copyText.style.display = "none";
  copyText.value = text;

  document.body.appendChild(copyText);
  copyText.select();
  document.execCommand('copy');
  document.body.removeChild(copyText);
}

function addCopyStatusAlert(element) {
  if (!element.getElementsByClassName('status-copy-alert').length) {
    let copyAlertElement = document.createElement('span');
    let copyMessage = document.createTextNode('Copied!');
    copyAlertElement.appendChild(copyMessage);

    element.appendChild(copyAlertElement);
    copyAlertElement.classList.add('status-copy-alert','slide-in');
    setTimeout(function() {
      element.removeChild(copyAlertElement);
    },800);
  }
}

.slide-in {
  animation: slide-in 0.25s forwards;
  -webkit-animation: slide-in 0.25s forwards;
}

@keyframes slide-in {
  100% {
    transform: translateX(0%);
  }
}

@-webkit-keyframes slide-in {
  100% {
    -webkit-transform: translateX(0%);
  }
}

.status-copy-alert {
  position: absolute;
  background-color: #18b495;
  color: #ffffff;
  padding: 10px 10px;
  border-radius: 5px;
  left: 65px;
  transform: translateX(-100%);
  -webkit-transform: translateX(-100%);
}

.status-copy-alert:before {
  content: "";
  position: absolute;
  height: 10px;
  width: 10px;
  background-color: #18b495;
  left: -5px;
  transform: rotate(45deg);
  top: 39%;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" rel="stylesheet" />
<div class="mainStatus">
  <h2 class="statusHeading">Latest English Status</h2>
  <div class="allStatus">
    <div class="bock">
      <div class="latestatus">
        <p class="copytxt">Life is good when you have books</p>
        <div>
          <button class="copystatus btn">Copy</button>
        </div>
      </div>
      <div class="latestatus">
        <p class="copytxt">Google is an open source library by Larry Page and Sergey Brin!</p>
        <div>
          <button class="copystatus btn">Copy</button>
        </div>
      </div>
    </div>
    <div class="block">
      <div class="latestatus">
        <p class="copytxt">Cats are better than dogs.</p>
        <div>
          <button class="copystatus btn">Copy</button>
        </div>
      </div>
      <div class="latestatus">
        <p class="copytxt">Cats are better than dogs.</p>
        <div>
          <button class="copystatus btn">Copy</button>
        </div>
      </div>
    </div>
  </div>
</div>