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The Startup

Everything You Need to Know About React Portals

Learn all about React portals and how to use them

  • Dialogs
  • Modals
  • Tooltips
Photo by Christian Wiediger on Unsplash
render() {
// React mounts a new div and renders the children into it
return (
<div> {this.props.children}
</div> );
render() {
// React does *not* create a new div. It renders the children into `domNode`.
// `domNode` is any valid DOM node, regardless of its location in the DOM.
return ReactDOM.createPortal(
const Modal =({ title, isOpen, onClose, children })=> {
if (!isOpen) return null
return ReactDOM.createPortal(
<button onClick={onClose}>Close</button>
domNode) // The domNode is a reference to somewhere in a root component

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Caelin Sutch

Founder, engineer, designer. Passionate about building cool shit.