ReactJS Blueprint ResizeSensor2 Component

Last Updated : 10 Jul, 2021

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. ResizeSensor2 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 ResizeSensor2 Component.

ResizeSensor2 Props:

children: It is used to denote a single child, and it must be an element and not a string or fragment.
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.
targetRef: If we want to attach a ref to the child yourself when rendering it, you must pass the same value here.

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
npm install @blueprintjs/popover2
```

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 { ResizeSensor2 } from "@blueprintjs/popover2"; 
  
function App() { 
  
    return ( 
        <div style={{ 
            display: 'block', width: 400, padding: 30 
        }}> 
            <h4>ReactJS Blueprint ResizeSensor2 Component</h4> 
            <ResizeSensor2 onResize={(entries) => 
                console.log(entries.map( 
                e =>`${e.contentRect.width} x ${e.contentRect.height}`))}> 
                <div style={{ width: 400, backgroundColor: 'lightgrey',  
                height: 100 }}> 
                    Component Dimesion: 400 X 100 
                </div> 
            </ResizeSensor2> 
        </div > 
    ); 
} 
  
export default App;