What is the purpose of using super constructor with props argument in ReactJS ?
Last Updated :
04 Dec, 2023
React, an open-source JavaScript library for UI design utilizes JSX to render components. Data is passed from parent to child components through props, which can only be updated by the parent. The `super()` function invokes the constructor of the parent class.
Prerequisites:
Steps to Create the React Application:
Step 1: Create a react application by typing the following command in the terminal.
npx create-react-app project_name
Step 2: Now, go to the project folder i.e. project_name by running the following command.
cd project_name
Project Structure:
Project Structure
The updated dependencies in package.json file will look like:
"dependencies": {
"react": "^18.2.0",
"react-dom": "^18.2.0",
"react-icons": "^4.12.0",
"react-scripts": "5.0.1",
"web-vitals": "^2.1.4",
}
Example: Let us create a super constructor with props argument.Â
Javascript
import React from "react";
class App extends React.Component {
constructor(props) {
super(props);
console.log("Empty props ", this.props);
}
render() {
return (
<div>
<p>Hello World!</p>
</div>
);
}
}
export default App;
|
Step to Run Application: Run the application using the following command from the root directory of the project:
npm start
Output:
this.props logÂ
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