button.js

import React from 'react'; // This imports the react library
import './styles.css' // In this case I chose to import the styles from a separate file

const Button = ({
  type = 'default' // this is the parameter you'll be able to define in the HTML
  cta = '',
  children, // by defining children as a parameter you are making it available to be used inside the component
}) => (
  <button className={`button-base ${type}`}>
    <p>{cta || children}</p> 
  </button>
);

export default Button; // You need to export this component in order to make it available to be used in your application