portal.md

product	title	components	githubLabel
base	React Portal component	Portal	component: Portal

Portal

The Portal component lets you render its children into a DOM node that exists outside of the Portal's 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 Unstyled Modal and Unstyled Popper components.

{{"component": "modules/components/ComponentLinkHeader.js", "design": false}}

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.

:::info According to the React docs, portals are useful when "you need the child element to visually 'break out' of its container"—for instance, modals and tooltips, which need to exist outside of the normal flow of the document. :::

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 the Portal's DOM hierarchy—click Mount children to see how it behaves:

{{"demo": "SimplePortal.js"}}

Server-side

:::warning React doesn't support the createPortal() API on the server. See this GitHub issue for details. :::

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