在Safari中使用flexbox绝对定位

Question

Safari has full support for FlexBox according to caniuse.

我只是尝试使用flexbox将一些不同大小的div叠加在一起。我真的很好奇为什么这适用于Chrome / Firefox但不适用于Safari：

<div class="container">
  <div class="inner-one"></div>
  <div class="inner-two"></div>
</div>

.container {
  width: 15rem;
  height: 15rem;
  border-radius: 50%;
  background-color: blue;

  display: flex;
  align-items: center;
  justify-content: center;
}

.container div {
  position: absolute;
}

.inner-one {
  width: 13rem;
  height: 13rem;
  border-radius: 50%;
  background-color: green;
}

.inner-two {
  width: 11rem;
  height: 11rem;
  border-radius: 50%;
  background-color: purple;
}

请在此处查看JSFiddle：https://jsfiddle.net/19n95exf/3/

Answer 1

由于position: absolute;中断了display: flex，请改为使用transform: translate

    .container {
      position: relative;
      width: 15rem;
      height: 15rem;
      border-radius: 50%;
      background-color: blue;
    }

    .container div {
      border-radius: 50%;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%,-50%);
    }

    .inner-one {
      width: 13rem;
      height: 13rem;
      background-color: green;
    }

    .inner-two {
      width: 11rem;
      height: 11rem;
      background-color: purple;
    }

    <div class="container">
      <div class="inner-one"></div>
      <div class="inner-two"></div>
    </div>

或者给内部元素一个左/上值

    .container {
      width: 15rem;
      height: 15rem;
      border-radius: 50%;
      background-color: blue;

      display: flex;
      align-items: center;
      justify-content: center;
    }

    .container div {
      border-radius: 50%;
      position: absolute;
    }

    .inner-one {
      left: 1.5rem;
      top: 1.5rem;
      width: 13rem;
      height: 13rem;
      background-color: green;
    }

    .inner-two {
      left: 2.5rem;
      top: 2.5rem;
      width: 11rem;
      height: 11rem;
      background-color: purple;
    }

<div class="container">
      <div class="inner-one"></div>
      <div class="inner-two"></div>
</div>