javascript - 标点加载 "animation"，javascript？

Question

我正在寻找一种显示一些标点符号加载“动画”的好方法。

我想要的是这样的:

This will display at second 1: "Waiting for your input."
This will display at second 2: "Waiting for your input.."
This will display at second 3: "Waiting for your input..."
This will display at second 4: "Waiting for your input...."
This will display at second 5: "Waiting for your input."
This will display at second 6: "Waiting for your input.."
This will display at second 7: "Waiting for your input..."
This will display at second 8: "Waiting for your input...."

等等。

我首先将 spans 中的点包围起来，并认为我可以使用 jquery 循环遍历它们并再显示一个，再显示一个，再显示一个，然后重置为 1。但是代码变得非常笨拙，所以我想知道你会怎么做？

Answer 1

纯 CSS 解决方案

演示:jsfiddle.net/feklee/D59P9

• HTML:

  Waiting<span class="dots"><span>.</span><span>.</span><span>.</span></span> for more.
  

• CSS:

  @keyframes dots-1 { from { opacity: 0; } 25% { opacity: 1; } }
  @keyframes dots-2 { from { opacity: 0; } 50% { opacity: 1; } }
  @keyframes dots-3 { from { opacity: 0; } 75% { opacity: 1; } }
  @-webkit-keyframes dots-1 { from { opacity: 0; } 25% { opacity: 1; } }
  @-webkit-keyframes dots-2 { from { opacity: 0; } 50% { opacity: 1; } }
  @-webkit-keyframes dots-3 { from { opacity: 0; } 75% { opacity: 1; } }
  
  .dots span {
      animation: dots-1 1s infinite steps(1);
      -webkit-animation: dots-1 1s infinite steps(1);
  }
  
  .dots span:first-child + span {
      animation-name: dots-2;
      -webkit-animation-name: dots-2;
  }
  
  .dots span:first-child + span + span {
      animation-name: dots-3;
      -webkit-animation-name: dots-3;
  }
  

仅 WebKit 的替代方案

优点:没有嵌套标签。这意味着省略号可以作为内容 到 ::after 伪元素中。

演示:jsfiddle.net/feklee/vFT7W

• HTML:

  Waiting<span>...</span> for more.
  

• CSS:

  body {
      font-family: 'Roboto', sans-serif;
      font-size: 50px;
  }
  
  @-webkit-keyframes dots {
      0% { background-position: 0px; }
      100% { background-position: 50px; }
  }
  
  span {
      background: linear-gradient(to right, white 50%, black 50%);
      color: transparent;
      -webkit-background-clip: text;
      -webkit-animation: dots 1s infinite steps(4);
      padding-right: 40px;
      margin-right: -40px;
  }