Test3

index.html

<div id="root">
</div>

script.babel

function tick() {
  const element = (
    <div>
      <h1>Hello world!</h1>
      <h2>It is {new Date().toLocaleTimeString()}.</h2>
    </div>
  );
  ReactDOM.render(element, document.getElementById("root"));
}

setInterval(tick, 1000);

scripts

<script src="https://unpkg.com/react/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom/umd/react-dom.development.js"></script>

test3.markdown

Test3

Learn the fundamentals of React, including simple and class components, state, props, and submitting form data.

Ticking Clock Example

A Pen by 你银子掉了 on CodePen.