React JS - Jargons Part 2

React Components: React components are JavaScript functions.

function Welcome(props) {
    return |h1>Hello {props.name}!|/h1>;
}
ReactDOM.render(|Welcome name="John Doe"/>, document.getElementById('root'));

React can also use ES6 classes to create components.

This example also creates a React component named "Welcome" with property arguments:

class Welcome extends React.Component {
    render() { return(|h1>Hello {this.props.name}|/h1>); }
}
ReactDOM.render(|Welcome name="John Doe"/>, document.getElementById('root'));


References:
https://www.w3schools.com/whatis/whatis_react.asp