相对于块固定的位置，而不是视口答案

【问题标题】：Position fixed relative to a block, not to the viewport相对于块固定的位置，而不是视口
【发布时间】：2018-09-17 00:33:08
【问题描述】：

我有 .gridster-item（块绝对定位，宽度和高度固定，并带有溢出自动），在里面我希望红色块（绝对位于右下角）留在他开始的位置，但是当我使用滚动条时，红色块跟随滚动条。

.gridster-item {
    width: 400px;
    height: 200px;
    position: relative;
    overflow: auto;
    background-color: rgb(204, 214, 249);
}

.resizer {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    background-color: red;
}

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    
</head>
<body>
    <div class="gridster-item">
        <div class="content">
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
            <p>Lorem Ipsun dolor amet</p>
        </div>
        <div class="resizer"></div>
    </div>
</body>
</html>

【问题讨论】：

标签： html css position css-position

【解决方案1】：

您需要使用带有position: relative 的包装器，以便绝对定位 元素将相对定位到它而不是受滚动 div 的影响：

#wrapper {
  display: inline-block; /* or "inline-flex" which also only takes the content's width */
  position: relative;
}

.gridster-item {
  width: 400px;
  height: 200px;
  /*position: relative;*/
  overflow: auto;
  background-color: rgb(204, 214, 249);
}

.resizer {
  position: absolute;
  bottom: 0;
  right: 17px; /* 17px because that's a typical width of the scrollbar */
  width: 10px;
  height: 10px;
  background-color: red;
}

<div id="wrapper">
  <div class="gridster-item">
    <div class="content">
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
      <p>Lorem Ipsun dolor amet</p>
    </div>
    <div class="resizer"></div>
  </div>
</div>

【讨论】：