拉伸 div 到父级的高度

Question

我知道这个问题的一些变体已经被问过很多次了。

但是，我似乎无法使用推荐的方法让它工作。

为什么 flex: 1 似乎被忽略了？

目的是让红色容器填满其下方可用的space。

CodeSandbox link here.

import React from "react";
import { render } from "react-dom";
import styled, { createGlobalStyle, ThemeProvider } from "styled-components";

const Style = createGlobalStyle`
  body, html {
    height: 100%;
    background: green;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    overflow-y: auto;
  }
`;

const FlexCol = styled.div`
  display: flex;
  flex-direction: column;
`;

const Layout = ({ children }) => {
  return (
    <div>
      <Header>header</Header>
      <FlexCol>{children}</FlexCol>
    </div>
  );
};

const Header = styled.div`
  height: 50;
  background: blue;
`;

const Home = () => {
  return (
    <div>
      <Feed />
    </div>
  );
};

const FeedContainer = styled.div`
  display: flex;
  flex-direction: column;
  flex: 1;
  background: red;
`;

const Feed = () => <FeedContainer>something</FeedContainer>;

const App = () => {
  return (
    <Layout>
      <Home />
    </Layout>
  );
};

render(
  <ThemeProvider theme={{}}>
    <React.Fragment>
      <Style />
      <App />
    </React.Fragment>
  </ThemeProvider>,
  document.getElementById("root")
);

Answer 1

您的设置中缺少的是正文和布局之间的中间容器的高度。您在其中呈现 React 应用程序的容器：#root.

在其上添加 100% 高度可解决问题：

const Style = createGlobalStyle`
  body, html {
    height: 100%;
    background: green;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    overflow-y: auto;
  }
  #root { //<-- this thingie
    height: 100%;
  }
`;

这是更新后的沙盒：https://codesandbox.io/s/xrw84wkw54

Answer 2

为了将来参考，这也可以通过设置 Layout 样式并在相关位置使用 flexGrow 来实现。

import React from "react";
import { render } from "react-dom";
import styled, { createGlobalStyle, ThemeProvider } from "styled-components";

const Style = createGlobalStyle`
  body, html {
    height: 100%;
    background: green;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    overflow-y: auto;
  }
`;

const FlexCol = styled.div`
  display: flex;
  flex-direction: column;
  flex-grow: 1;
`;

const Layout = ({ children }) => {
  return (
    <div style={{ height: "100vh", display: "flex", flexDirection: "column" }}>
      <Header>header</Header>
      <FlexCol>{children}</FlexCol>
    </div>
  );
};

const Header = styled.div`
  height: 50;
  background: blue;
`;

const Home = () => {
  return (
    <div
      style={{
        height: "100%"
      }}
    >
      <Feed />
    </div>
  );
};

const FeedContainer = styled.div`
  display: flex;
  flex: 1;
  background: red;
  height: 100%;
  width: 100px;
`;

const Feed = () => <FeedContainer>something</FeedContainer>;

const App = () => {
  return (
    <Layout>
      <Home />
    </Layout>
  );
};

render(
  <ThemeProvider theme={{}}>
    <React.Fragment>
      <Style />
      <App />
    </React.Fragment>
  </ThemeProvider>,
  document.getElementById("root")
);

这给出：

拉伸 div 到父级的高度

Stretching div to height of parent

css

reactjs

styled-components