Portal

The Portal component lets you render its children into a DOM node that exists outside of its own DOM hierarchy.

Introduction

Portal is a utility component built around React's createPortal() API. It gives you the functionality of createPortal() in a convenient component form.

The Portal component is used internally by the ModalUnstyled and Popper components.

Component

Usage

After installation, you can start building with this component using the following basic elements:

import Portal from '@mui/base/Portal';

export default function MyApp() {
  return (
    <Portal>{/* children to be rendered outside of the current DOM node */}</Portal>
  );
}

Basics

Normally, children of a component are rendered within that component's DOM tree. But sometimes it's necessary to mount a child at a different location in the DOM.

The Portal component accepts a container prop that passes a ref to the DOM node where its children will be mounted.

The following demo shows how a <span> nested within a Portal can be appended to a node outside of its own DOM hierarchy—click Mount children to see how it behaves:

It looks like I will render here.

<button type="button" onClick={handleClick}>
  {show ? 'Unmount children' : 'Mount children'}
</button>
<Box sx={{ p: 1, my: 1, border: '1px solid' }}>
  It looks like I will render here.
  {show ? (
    <Portal container={container.current}>
      <span>But I actually render here!</span>
    </Portal>
  ) : null}
</Box>
<Box sx={{ p: 1, my: 1, border: '1px solid' }} ref={container} />

Server-side

The Portal component cannot be used to render child elements on the server—client-side hydration is necessary.

API

<Portal />