import * as React from 'react';

export default class AppHost extends React.Component<any, any> {
  constructor() {
    super();
  }

  render() {
    return (
      <div>
        {this.props.children}
      </div>
    );
  }
}

import * as React from 'react';

export default class AppHost extends React.Component<any, any> {
  constructor() {
    super();
  }

  render() {
    return (
      React.Children.only(this.props.children)
    );
  }
}

--- 
+++ 
@@ -7,7 +7,9 @@
 
   render() {
     return (
-      React.Children.only(this.props.children)
+      <div>
+        {this.props.children}
+      </div>
     );
   }
 }
Expand apphost to support multiple components
