@mui/core/Portal/Portal.js

import * as React from 'react';
import * as ReactDOM from 'react-dom';
import PropTypes from 'prop-types';
import { exactProp, HTMLElementType, unstable_useEnhancedEffect as useEnhancedEffect, unstable_useForkRef as useForkRef, unstable_setRef as setRef } from '@mui/utils';

function getContainer(container) {
  return typeof container === 'function' ? container() : container;
}
/**
 * Portals provide a first-class way to render children into a DOM node
 * that exists outside the DOM hierarchy of the parent component.
 */


const Portal = /*#__PURE__*/React.forwardRef(function Portal(props, ref) {
  const {
    children,
    container,
    disablePortal = false
  } = props;
  const [mountNode, setMountNode] = React.useState(null);
  const handleRef = useForkRef( /*#__PURE__*/React.isValidElement(children) ? children.ref : null, ref);
  useEnhancedEffect(() => {
    if (!disablePortal) {
      setMountNode(getContainer(container) || document.body);
    }
  }, [container, disablePortal]);
  useEnhancedEffect(() => {
    if (mountNode && !disablePortal) {
      setRef(ref, mountNode);
      return () => {
        setRef(ref, null);
      };
    }

    return undefined;
  }, [ref, mountNode, disablePortal]);

  if (disablePortal) {
    if ( /*#__PURE__*/React.isValidElement(children)) {
      return /*#__PURE__*/React.cloneElement(children, {
        ref: handleRef
      });
    }

    return children;
  }

  return mountNode ? /*#__PURE__*/ReactDOM.createPortal(children, mountNode) : mountNode;
});
process.env.NODE_ENV !== "production" ? Portal.propTypes
/* remove-proptypes */
= {
  // ----------------------------- Warning --------------------------------
  // | These PropTypes are generated from the TypeScript type definitions |
  // |     To update them edit the d.ts file and run "yarn proptypes"     |
  // ----------------------------------------------------------------------

  /**
   * The children to render into the `container`.
   */
  children: PropTypes.node,

  /**
   * An HTML element or function that returns one.
   * The `container` will have the portal children appended to it.
   *
   * By default, it uses the body of the top-level document object,
   * so it's simply `document.body` most of the time.
   */
  container: PropTypes
  /* @typescript-to-proptypes-ignore */
  .oneOfType([HTMLElementType, PropTypes.func]),

  /**
   * The `children` will be under the DOM hierarchy of the parent component.
   * @default false
   */
  disablePortal: PropTypes.bool
} : void 0;

if (process.env.NODE_ENV !== 'production') {
  // eslint-disable-next-line
  Portal['propTypes' + ''] = exactProp(Portal.propTypes);
}

export default Portal;