How to use third party modules in react app without babel and webpack (propTypes)?

Question

JavaScript

started reading a book on react. The conversation started at the beginning about propTypes. It seems like now it is not part of React and you need to pull it separately from npm. And to use it, you need to import it import PropTypes from "prop-types";
How to use this module without transpiling and module builder?
How can I run this code without third-party tools?

// import PropTypes from "prop-types";

let Component = React.createClass({
  propTypes: {
      name: PropTypes.string.isRequired
  },

  render: function() {
    return React.DOM.span(null, "My name is " + this.props.name);
  }
});

ReactDOM.render(
  React.createElement(Component, {
    name: "Alex"
  }),
  document.getElementById("app")
);

Answer 1

How can I run this code without third-party tools?

what's the point?
require of course has not been canceled, but even large companies use create-react-app