React element resize observer

A simple React Higher-Order Component who handle element resize detection from your React Components.

Installation

npm install react-element-onresize --save-dev

Browser Support

With ResizeObserver Polyfill

NOTE: Internet Explorer 8 and its earlier versions are not supported.

Without any Polyfill

Usage

ESNext syntax with decorators

import React, { Component } from 'react';
import ElementResize from 'react-element-onresize';

@ElementResize()
class App extends Component {
  constructor(props){
    super(props);
  }

  render(){
    const { elemResize } = this.props;

    return (
      <div>
        <p>width: {(elemResize.contentRect)? Math.floor(elemResize.contentRect.width) : 0} px</p>
        <p>height: {(elemResize.contentRect)? Math.floor(elemResize.contentRect.height) : 0} px</p>
      </div>
    )
  }
}

export default App;

ES6 syntax

import React, { Component } from 'react';
import ElementResize from 'react-element-onresize';

class App extends Component {
  constructor(props){
    super(props);
  }

  render(){
    const { elemResize } = this.props;

    return (
      <div>
        <p>width: {(elemResize.contentRect)? Math.floor(elemResize.contentRect.width) : 0} px</p>
        <p>height: {(elemResize.contentRect)? Math.floor(elemResize.contentRect.height) : 0} px</p>
      </div>
    )
  }
}

export default ElementResize()(App);

Polyfill usage

import React, { Component } from 'react';
import ElementResize from 'react-element-onresize';
import resizeObserver from "resize-observer-polyfill";

@ElementResize(resizeObserver)
class App extends Component {
  constructor(props){
    super(props);
  }

  render(){
    const { elemResize } = this.props;

    return (
      <div>
        <p>width: {(elemResize.contentRect)? Math.floor(elemResize.contentRect.width) : 0} px</p>
        <p>height: {(elemResize.contentRect)? Math.floor(elemResize.contentRect.height) : 0} px</p>
      </div>
    )
  }
}

export default App;