css 当另一个div的高度更改或对其内容执行换行时,将伸缩方向更改为列

eyh26e7m  于 2022-12-20  发布在  其他
关注(0)|答案(2)|浏览(106)

我实际上使用的是React MUI V5,基本上需要在前面的div更改高度或换行时将div的flex方向从行更改为列。
这里是一个简单的例子,我目前在纯HTML/CSS,但不确定是否有其他方法与flex框来实现这一点:

.parent{
        display:flex;
        flex-direction: row;
        flex-wrap: wrap;
      }
      .child1{
        display: flex;
        max-width: 80%;
        padding: 10px;
      }
      .child2{
        display: flex;
        max-width: 80%;
        height: 30px;
        flex-direction: row;
      }

    <div class="parent">
      <div class="child1">
<p>
      so much data here. so much data here so much data here so much data hereso much data here v so much data here v so much data here vso
      so much data here. so much data here so much data here so much data hereso much data here v so much data here v so much data here vso
      so much data here. so much data here so much data here so much data hereso much data here v so much data here v so much data here vso
      so much data here. so much data here so much data here so much data hereso much data here v so much data here v so much data here vso
   </p>
    
      </div>
      <div class="child2">
        <button>Button1</button>
        <button>Button2</button>
      </div>
    </div>

我已经创建了上面的jsFiddle here
基本上,当类child1的div是单行(没有换行或高度变化)时,div类child2保持为flex-direction: row,否则当child1类换行或改变高度时,这需要改变为flex-direction: column
不确定如何在我的MUI组件中实现这一点,也不确定我是否可以使用MUI V5断点?
对于jsFiddle示例,flex-direction需要更改为column,因为child1 div已经 Package 了它的内容。

juzqafwq

juzqafwq1#

使用CSS或MUI V5无法实现这一点

  • 您需要使用媒体查询或javascript进行此操作

使用Javascript时,当项目被 Package 时,它的元素o f f s e t offsetheight将变为大于0 baseheight,然后更改flex方向。

function isWrraped(id) {
    let el = document.getElementById(id);
    // 178 is base height
    return (el.offsetHeight > 178);
}

window.onresize = function (event) {
   isWrraped("child1");
}
d6kp6zgx

d6kp6zgx2#

在您的代码示例中,我没有看到React或MUI的任何痕迹。
您需要为第一个子对象的当前高度指定一个状态。
使用第一个子对象的ref,我们将使用useLayourEffect内的每个渲染更新height,以便获得最新的div高度。
我还使用了MUI sx props来应用样式。

import { Box } from "@mui/material";
import React, { useLayoutEffect, useRef, useState } from "react";

export default function test() {
  const [height, setHeight] = useState(0);
  const ref = useRef(null);

  useLayoutEffect(() => {
    setHeight(ref.current.clientHeight);
  });

  return (
    <Box sx={{ display: "flex", flexDirection: "row", flexWrap: "wrap" }}>
      <Box
        sx={{
          display: "flex",
          maxWidth: "80%",
          padding: "10px",
        }}
        ref={ref}
      >
        <p>
          so much data here. so much data here so much data here so much data
          hereso much data here v so much data here v so much data here vso so
          {height}
        </p>
      </Box>
      <Box
        sx={{
          display: "flex",
          maxWidth: "80%",
          flexDirection: height < 45 ? "row" : "column",
        }}
      >
        <button>Button1</button>
        <button>Button2</button>
      </Box>
    </Box>
  );
}

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