React: Pass component as prop without using this.props.children

Question

I have this a component Foo.js:

// a svg component with a star.svg icon
import { IconStar } from 'react-svg-icons'; 

// call a button with a custom icon
<Button icon={ IconStar }> Click to trigger </Button>

And then on button.js I have:

render() {
  const theIcon = this.props.icon;
  return (
    <button>
      {this.props children}
      {icon() /*this works but i can't pass props inside it*/} 
      <theIcon className={ Styles.buttonIcon } />
    </button>
  )
}

I want to render <IconStar> inside <Button>, how do I do that?.

I can't pass this as this.prop.children because it has more logic around the icon prop, but in this case I'm showing only a demo.

Thanks

Answer 1

The only thing you have missed is that for JSX to transpile to JS custom components should be named starting with a capital letter, e.g. <TheIcon />, while lowercase letter signifies native DOM elements, e.g. <button />.:

render() {
  const TheIcon = this.props.icon;  // note the capital first letter!
  return (
    <button>
      {this.props.children}
      <TheIcon className={ Styles.buttonIcon } />
    </button>
  )
}

https://jsfiddle.net/03h2swkc/3/