Answers for "reacts screen width"

react get screen width

// useWindowDimensions.js

import { useState, useEffect } from 'react';

export default function useWindowDimensions() {

  const hasWindow = typeof window !== 'undefined';

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

  const [windowDimensions, setWindowDimensions] = useState(getWindowDimensions());

  useEffect(() => {
    if (hasWindow) {
      function handleResize() {
        setWindowDimensions(getWindowDimensions());
      }

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

  return windowDimensions;
}

// yourComponent.js

import useWindowDimensions from './hooks/useWindowDimensions';

const Component = () => {
  const { height, width } = useWindowDimensions();
  /* you can also use default values or alias to use only one prop: */
  // const { height: windowHeight = 480 } useWindowDimensions();

  return (
    <div>
      width: {width} ~ height: {height}
    </div>
  );

react get screen width

// useWindowDimensions.js

import { useState, useEffect } from 'react';

export default function useWindowDimensions() {

  const hasWindow = typeof window !== 'undefined';

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

  const [windowDimensions, setWindowDimensions] = useState(getWindowDimensions());

  useEffect(() => {
    if (hasWindow) {
      function handleResize() {
        setWindowDimensions(getWindowDimensions());
      }

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

  return windowDimensions;
}

// yourComponent.js

import useWindowDimensions from './hooks/useWindowDimensions';

const Component = () => {
  const { height, width } = useWindowDimensions();
  /* you can also use default values or alias to use only one prop: */
  // const { height: windowHeight = 480 } useWindowDimensions();

  return (
    <div>
      width: {width} ~ height: {height}
    </div>
  );

reacts screen width

class Main extends React.Component {
 constructor(props) {
    super(props);
    this.state = { windowWidth: window.innerWidth };
  }

 const handleResize = (e) => {
  this.setState({ windowWidth: window.innerWidth });
 };

 componentDidMount() {
  window.addEventListener("resize", this.handleResize);
 }

 componentWillUnMount() {
  window.addEventListener("resize", this.handleResize);
 } 

  render() {
    const { windowWidth } = this.state; 
    return <div>Current window width: {windowWidth}</div>
  }
}

reacts screen width

class Main extends React.Component {
 constructor(props) {
    super(props);
    this.state = { windowWidth: window.innerWidth };
  }

 const handleResize = (e) => {
  this.setState({ windowWidth: window.innerWidth });
 };

 componentDidMount() {
  window.addEventListener("resize", this.handleResize);
 }

 componentWillUnMount() {
  window.addEventListener("resize", this.handleResize);
 } 

  render() {
    const { windowWidth } = this.state; 
    return <div>Current window width: {windowWidth}</div>
  }
}