position.uvue

<template>
  <!-- #ifdef APP -->
  <scroll-view style="flex: 1">
  <!-- #endif -->
    <view style="flex-grow: 1">
      <view>
        <text>position: fixed</text>
        <scroll-view style="width: 250px; height: 250px; background-color: gray">
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view class="common fixed" style="position: fixed">
            <text class="text">fixed</text>
          </view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view style="width: 50px; height: 50px; background-color: green"></view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view style="width: 50px; height: 50px; background-color: green"></view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
        </scroll-view>
      </view>

      <view>
        <text>position: relative</text>
        <scroll-view style="width: 250px; height: 250px; background-color: gray">
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view class="common" style="position: relative">
            <text class="text">relative</text>
          </view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view style="width: 50px; height: 50px; background-color: green"></view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view style="width: 50px; height: 50px; background-color: green"></view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
        </scroll-view>
      </view>

      <view>
        <text>position: absolute</text>
        <scroll-view style="width: 250px; height: 250px; background-color: gray">
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view class="common" style="position: absolute">
            <text class="text">absolute</text>
          </view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view style="width: 50px; height: 50px; background-color: green"></view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
          <view style="width: 50px; height: 50px; background-color: red"></view>
          <view style="width: 50px; height: 50px; background-color: green"></view>
          <view style="width: 50px; height: 50px; background-color: blue"></view>
        </scroll-view>
      </view>

    </view>
  <!-- #ifdef APP -->
  </scroll-view>
  <!-- #endif -->

</template>

<style>
  .common {
    width: 50px;
    height: 50px;
    background-color: green;
    top: 25px;
    left: 25px;
    justify-content: center;
    align-items: center;
  }

  .fixed {
    /* #ifdef WEB*/
    top: calc(var(--window-top) + 25px);
    /* #endif */
  }

  .text {
    white-space: nowrap;
    width: 100%;
  }
</style>