页面加载时，关键帧动画在 Inner-Div 上不起作用答案

【问题标题】：Keyframe Animation Not Working On Inner-Div On Page Load页面加载时，关键帧动画在 Inner-Div 上不起作用
【发布时间】：2020-06-04 17:29:16
【问题描述】：

我正在尝试使用这个问题的解决方案：

css3 transition animation on load?

我的 HTML 和 CSS 有以下内容：

@keyframes slideInFromRight {
    0% {
      transform: translateX(100%);
    }
    100% {
      transform: translateX(0);
    }
}

.announcements-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    width: 300px;
    /* animation: 1s ease-out 0s 1 slideInFromRight; */
}

.announcments-1 {
    animation: 1s ease-out 0s 1 slideInFromRight;
}

.announcements-2 {
    margin-top: 15px;
}

.annoucements-header {
    background-color: #1481C3;
    color: #ffffff;
    font-family: "Proxima Nova Bold";
    padding: 7px 10px;
}

.annoucements-close {
    position: absolute;
    right: 5px;
    width: 24px;
    height: 36px;
    cursor: pointer;
    opacity: .85;
}
.annoucements-close:hover {
    opacity: 1;
}
.annoucements-close::before,
.annoucements-close::after {
    content: '';
    width: 24px;
    height: 2px;
    background: white;
    position: absolute;
    top: 7px;
    left: 0;
}
.annoucements-close::before {
    transform: rotate(-45deg);
}
.annoucements-close::after {
    transform: rotate(45deg);
}

<body>
<div class="announcements-container">
    <div class="announcements-1">
      <div class="annoucements-header">
        <span class="annoucement-type-quantity">2 School Announcements</span>
        <i class="annoucements-close"></i>
      </div>
    </div>
    <div class="announcements-2">
      <div class="annoucements-header">
        <span class="annoucement-type-quantity">1 Admin Annoucement</span>
        <i class="annoucements-close"></i>
      </div>
    </div>
  </div>
</body>

如您所见，当 animation: 1s ease-out 0s 1 slideInFromRight; 应用于内部 div 时，它不会做任何事情。但是，当应用于容器 div 时，它确实有效：

@keyframes slideInFromRight {
    0% {
      transform: translateX(100%);
    }
    100% {
      transform: translateX(0);
    }
}

.announcements-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    width: 300px;
    animation: 1s ease-out 0s 1 slideInFromRight;
}

.announcments-1 {
    /*animation: 1s ease-out 0s 1 slideInFromRight;*/
}

.announcements-2 {
    margin-top: 15px;
}

.annoucements-header {
    background-color: #1481C3;
    color: #ffffff;
    font-family: "Proxima Nova Bold";
    padding: 7px 10px;
}

.annoucements-close {
    position: absolute;
    right: 5px;
    width: 24px;
    height: 36px;
    cursor: pointer;
    opacity: .85;
}
.annoucements-close:hover {
    opacity: 1;
}
.annoucements-close::before,
.annoucements-close::after {
    content: '';
    width: 24px;
    height: 2px;
    background: white;
    position: absolute;
    top: 7px;
    left: 0;
}
.annoucements-close::before {
    transform: rotate(-45deg);
}
.annoucements-close::after {
    transform: rotate(45deg);
}

<body>
<div class="announcements-container">
    <div class="announcements-1">
      <div class="annoucements-header">
        <span class="annoucement-type-quantity">2 School Announcements</span>
        <i class="annoucements-close"></i>
      </div>
    </div>
    <div class="announcements-2">
      <div class="annoucements-header">
        <span class="annoucement-type-quantity">1 Admin Annoucement</span>
        <i class="annoucements-close"></i>
      </div>
    </div>
  </div>
</body>

但问题在于，我希望 div 一个接一个地依次滑入。如果我“X”出顶部 div，我希望第二个 div 向上滑动并取而代之，这就是为什么我假设容器 div 是必要的。

我还能做些什么来使动画一次应用于子 div 吗？是否有一些关键帧会阻止内部 div 上的动画？用 JavaScript 做这件事会更好吗？

Link to JSFiddle

【问题讨论】：

标签： html css css-animations keyframe

【解决方案1】：

一开始可能看起来很奇怪，但您的样式表中有一个错字。 您声明 announcements-1 但使用 announcments-1 设置样式的位置。

所以做对了就会得到你想要的：

@keyframes slideInFromRight {
  0% {
    transform: translateX(100%);
  }
  100% {
    transform: translateX(0);
  }
}

.announcements-container {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  width: 300px;
  /*animation: 1s ease-out 0s 1 slideInFromRight;*/
}

.announcements-1 {
  animation: 1s ease-out 0s 1 slideInFromRight;
}

.announcements-2 {
  margin-top: 15px;
}

.annoucements-header {
  background-color: #1481C3;
  color: #ffffff;
  font-family: "Proxima Nova Bold";
  padding: 7px 10px;
}

.annoucements-close {
  position: absolute;
  right: 5px;
  width: 24px;
  height: 36px;
  cursor: pointer;
  opacity: .85;
}

.annoucements-close:hover {
  opacity: 1;
}

.annoucements-close::before,
.annoucements-close::after {
  content: '';
  width: 24px;
  height: 2px;
  background: white;
  position: absolute;
  top: 7px;
  left: 0;
}

.annoucements-close::before {
  transform: rotate(-45deg);
}

.annoucements-close::after {
  transform: rotate(45deg);
}

<body>
  <div class="announcements-container">
    <div class="announcements-1">
      <div class="annoucements-header">
        <span class="annoucement-type-quantity">2 School Announcements</span>
        <i class="annoucements-close"></i>
      </div>
    </div>
    <div class="announcements-2">
      <div class="annoucements-header">
        <span class="annoucement-type-quantity">1 Admin Annoucement</span>
        <i class="annoucements-close"></i>
      </div>
    </div>
  </div>
</body>

【讨论】：