React Base Fiddle (JSX)

Starting point for creating JSFiddles with React.

by gatsbimantico

HTML

<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

Babel + JSX

class Child extends React.Component {
render() {
  return <span>{A.test}</span>;
}
}

class ErrorBoundary extends React.Component {
  state = { hasError: '' };
  render() {
    return this.state.hasError ? <span>Oops! Something went wrong:<br />{this.state.hasError.toString()}</span> : this.props.children;
  }
}
ErrorBoundary.getDerivedStateFromError = (error) => ({ hasError: error });
 
ReactDOM.render(
  <div>
    <h1>Demo</h1>
    <ErrorBoundary>
      <Child />
    </ErrorBoundary>
  </div>,
  document.getElementById('container')
);