In React, components are the building blocks of an application. A component is a self-contained and reusable piece of code that can be used to create user interface elements.

When building a payment app, you can create components for different parts of the app, such as buttons, forms, and payment cards.

Creating reusable components allows you to abstract away the implementation details and create a consistent user interface across the app. For example, you can create a Button component that accepts the text prop and renders a button element with the specified text.

Here's an example of a Button component:

1// Example component
2function Button({ text }) {
3  return <button>{text}</button>;
4}
5
6// Example usage
7class App extends React.Component {
8  render() {
9    return (
10      <div>
11        <Button text="Click me!" />
12      </div>
13    );
14  }
15}

In this example, we have a Button component that accepts the text prop. The component returns a button element with the specified text. In the App component, we are rendering the Button component and passing the text prop with the value "Click me!".

By creating components and passing props, you can easily reuse and customize these components throughout your payment app.

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// Example component

function Button({ text }) {

  return <button>{text}</button>;

}

​

// Example usage

class App extends React.Component {

  render() {

    return (

      <div>

        <Button text="Click me!" />

      </div>

    );

  }

}