使用钩子:

使用useLayoutEffect在这里更有效:

import { useState, useLayoutEffect } from 'react';

function getWindowDimensions() {
  const { innerWidth: width, innerHeight: height } = window;
  return {
    width,
    height
  };
}

export default function useWindowDimensions() {
  const [windowDimensions, setWindowDimensions] = useState(getWindowDimensions());

  useLayoutEffect(() => {
    function handleResize() {
      setWindowDimensions(getWindowDimensions());
    }

    window.addEventListener('resize', handleResize);
    return () => window.removeEventListener('resize', handleResize);
  }, []);

  return windowDimensions;
}

用法:

const { height, width } = useWindowDimensions();

这是你如何实现它，并在React函数组件中实时获得窗口宽度和高度:

import React, {useState, useEffect} from 'react' 
const Component = () => {
  const [windowWidth, setWindowWidth] = useState(0)
  const [windowHeight, setWindowHeight] = useState(0)
  
  useEffect(() => {
    window.addEventListener('resize', e => {
      setWindowWidth(window.innerWidth);
    });
  }, [window.innerWidth]);

  useEffect(() => {
    window.addEventListener('resize', e => {
      setWindowHeight(window.innerHeight);
    });
  }, [window.innerHeight]);

  return(
    <h3>Window width is: {windowWidth} and Height: {windowHeight}</h3>
  )
}

这个答案与Jabran Saeed的类似，除了它也处理窗口大小的调整。接下来交给我吧。

constructor(props) {
  super(props);
  this.state = { width: 0, height: 0 };
  this.updateWindowDimensions = this.updateWindowDimensions.bind(this);
}

componentDidMount() {
  this.updateWindowDimensions();
  window.addEventListener('resize', this.updateWindowDimensions);
}

componentWillUnmount() {
  window.removeEventListener('resize', this.updateWindowDimensions);
}

updateWindowDimensions() {
  this.setState({ width: window.innerWidth, height: window.innerHeight });
}

// just use (useEffect). every change will be logged with current value
import React, { useEffect } from "react";

export function () {
  useEffect(() => {
    window.addEventListener('resize', () => {
      const myWidth  = window.innerWidth;
      console.log('my width :::', myWidth)
   })
  },[window])

  return (
    <>
      enter code here
   </>
  )
}

在这里，您可以将投票次数最多的答案包装在一个节点包中(已测试，typescript)，以便使用。

安装:

npm i @teambit/toolbox.react.hooks.get-window-dimensions

用法:

import React from 'react';
import { useWindowDimensions } from '@teambit/toolbox.react.hooks.get-window-dimensions';

const MyComponent = () => {
  const { height, width } = useWindowDimensions();

  return (
    <>
      <h1>Window size</h1>
      <p>Height: {height}</p>
      <p>Width: {width}</p>
    </>
  );
};

class AppComponent extends React.Component {

  constructor(props) {
    super(props);
    this.state = {height: props.height};
  }

  componentWillMount(){
    this.setState({height: window.innerHeight + 'px'});
  }

  render() {
    // render your component...
  }
}

设置道具

AppComponent.propTypes = {
 height:React.PropTypes.string
};

AppComponent.defaultProps = {
 height:'500px'
};

视口高度现在可用{this.state。渲染模板中的Height}