ReactJS Blueprint ResizeSensor Component

BlueprintJS is a React-based UI toolkit for the web. This library is very optimized and popular for building interfaces that are complex data-dense for desktop applications. ResizeSensor Component provides a way for users to provides them a resize event for its single DOM element child. We can use the following approach in ReactJS to use the ReactJS Blueprint ResizeSensor Component.

ResizeSensor Props:

observeParents: It is used to indicate that all parent DOM elements of the container will also be observed for size changes if this is set to true.
onResize: It is a callback that is triggered when the wrapped element resizes.

Creating React Application And Installing Module:

Step 1: Create a React application using the following command:
```
npx create-react-app foldername
```

Step 2: After creating your project folder i.e. foldername, move to it using the following command:
```
cd foldername
```
Step 3: After creating the ReactJS application, Install the required module using the following command:
```
npm install @blueprintjs/core
```

Project Structure: It will look like the following.

Project Structure

Example: Now write down the following code in the App.js file. Here, App is our default component where we have written our code.

App.js

import React from 'react'

import '@blueprintjs/core/lib/css/blueprint.css'; 

import { ResizeSensor } from "@blueprintjs/core"; 

function App() { 

    return ( 

        <div style={{ 

            display: 'block', width: 400, padding: 30 

        }}> 

            <h4>ReactJS Blueprint ResizeSensor Component</h4> 

            <ResizeSensor onResize={(entries) => 

                console.log(entries.map(e =>  

        `${e.contentRect.width} x ${e.contentRect.height}`))}> 

                <div style={{ width: 300,  

                    backgroundColor: 'green', height: 50 }}> 

                    Size: 300 X 50 

                </div> 

            </ResizeSensor> 

        </div > 

    ); 
} 

export default App;