Vue Transition-Group - 如何防止“跳跃”？

Question

我有两个div，我使用transition-group在它们之间进行转换，它的工作原理应该是这样的——但是，div转换下方的内容是“跳跃”的，具体取决于div的高度。我想要的是阻止跳跃，而是以某种方式进行动画处理，这样在元素之间切换时我会得到一个很好的平滑过渡，而不会“推”到带有“跳跃”的内容。

希望这是有道理的:)

我在这里设置了codesandbox的示例： https: //codesandbox.io/s/reverent-stallman-8ixhp ?file=/src/components/HelloWorld.vue

模板如下所示：

<div class="hello">
    <button @click="groupShowOne">Show first {{ gShowFirst }}</button>
    <button @click="groupShowTwo">Show second {{ gShowSecond }}</button>
    <transition-group name="fade-group" tag="div" mode="out-in" appear>
      <div
        class="group-element"
        v-if="gShowFirst"
        style="background-color: yellow"
      >
        <h3>This is a headline</h3>
        <p>This is a text</p>
      </div>
      <div
        class="group-element"
        v-if="gShowSecond"
        style="background-color: red"
      >
        <h3>
          This is a headline <br />This is a headline <br />This is a headline
          This is a headline This is a headline This is a headline
        </h3>
        <p>
          This is a text This is a text This is a text This is a text This is a
          text v This is a text v <br />This is a text This is a text This is a
          text This is a text This is a text v This is a text v <br />This is a
          text This is a text This is a text This is a text This is a text v
          This is a text v
        </p>
      </div>
    </transition-group>
    <div style="background-color: blue; min-height: 500px; color: #FFF">
      Prevent this div from jumping<br />
    </div>
  </div>

动画看起来：

<style scoped>
.group-element {
  width: 100%;
  min-height: 100px;
  max-height: 20000px;
  transition: all 0.5s;
}
.fade-group-enter,
.fade-group-leave-to {
  opacity: 1;
}
.fade-group-leave-active {
  opacity: 0;
  position: absolute;
}
</style>

Answer 1

尝试这个

1. 在被动 div 中设置过渡属性：

.ele {
  background-color: blue;
  min-height: 500px;
  color: #fff;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
  -o-transition: all 0.5s;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
}

2. 让它做一些动画

eleStyle() {
  return {
    transform: this.gShowSecond ? "translate3d(0, 100px, 0)" : "none",
  };
},

分区：

<div class="ele" :style="eleStyle">Prevent this div from jumping<br /></div>