React.js Blueprint is a front-end UI toolkit. It is very optimized and popular for building complex data-dense interfaces for desktop applications.
ReactJs Blueprint Popover2 component makes the content associated with a target element appear floating on the screen. The backdrop is a transparent layer that appears on the screen and prevents any interaction with other elements on the screen. To add a backdrop to the Popover2 Component we pass the hasBackdrop prop, which takes a boolean value. It is true by default.
Syntax:
<Popover2 hasBackdrop/>
Prerequisite:
- Introduction and installation reactJS
- ReactJS Blueprint Popover2 Component
- React Hook useState
Creating React Application and Module installation:
Step 1: Create the react project folder, for that open the terminal, and write the command npm create-react-app folder name, if you have already installed create-react-app globally. If you haven’t then install create-react-app globally by using the command npm -g create-react-app or can install locally by npm i create-react-app.
npm create-react-app project
Step 2: After creating your project folder (i.e. project), move to it using the following command.
cd project
Step 3: Now install the dependency by using the following command:
npm install @blueprintjs/core npm install @blueprintjs/popover2
Project Structure: It will look like this:
Example 1: We are importing the Popover2 Component from “@blueprintjs/popover2” and the Button Component from “@blueprintjs/core”. To apply the default styles of the components we are importing “@blueprintjs/core/lib/css/blueprint.css”.
To the Popover2 Component in the content, we have created a div with some inline styling and the text “Welcome to Geeksforneveropen !”. Now to the Popover2 component, we are passing the hasBackdrop prop.
App.js
import { Button } from "@blueprintjs/core"; import { Popover2 } from "@blueprintjs/popover2"; import "@blueprintjs/core/lib/css/blueprint.css"; function App() { return ( <div className="App"> <h3> React Blueprint Popover2 Backdrop</h3> <div> <Popover2 hasBackdrop content={ <div style={{ backgroundColor: "white", padding: "30px" }}> <h2> Welcome to{" "} <span style={{ color: "green" }}> Geeksforneveropen </span>! </h2> </div> } renderTarget={({ isOpen, ref, ...targetProps }) => ( <Button {...targetProps} elementRef={ref} text="Click me" /> )} /> </div> </div> ); } export default App; |
Step to Run Application: Run the application using the following command from the project’s root directory.
npm start
Output:
Example 2: We are creating a state naming backdrop using react hook useState. We are creating a dropdown with some options and adding an onChange function selectHandle, that sets the backdrop. To the hasBackdrop prop, we are passing the backdrop state.
App.js
import { useState } from "react"; import { Button } from "@blueprintjs/core"; import { Popover2 } from "@blueprintjs/popover2"; import "@blueprintjs/core/lib/css/blueprint.css"; function App() { const [backdrop, setBackdrop] = useState(true); const selectHandle = (e) => { if (e.target.value === true) setBackdrop(true); else setBackdrop(false); }; return ( <div className="App"> <h3> React Blueprint Popover2 Backdrop</h3> <label> hasBackdrop : </label> <select onChange={selectHandle}> <option value={true}>true</option> <option value={false}>false</option> </select> <div> <Popover2 hasBackdrop={backdrop} content={ <div style={{ backgroundColor: "#FFEEA6", padding: "10px" }}> <h2>Welcome to Geeksforneveropen</h2> <p>Let's begin ...</p> </div> } renderTarget={({ isOpen, ref, ...targetProps }) => ( <Button {...targetProps} elementRef={ref} text="Click me !" /> )} /> </div> </div> ); } export default App; |
Step to Run Application: Run the application using the following command from the project’s root directory.
npm start
Output:
Reference: https://blueprintjs.com/docs/#popover2-package/popover2.backdrop
