@wordpress/components/build-module/slot-fill/bubbles-virtually/fill.js

UI components for WordPress.

import { createElement } from "@wordpress/element";
// @ts-nocheck

/**
 * WordPress dependencies
 */
import { useRef, useState, useEffect, createPortal } from '@wordpress/element';
/**
 * Internal dependencies
 */

import useSlot from './use-slot';
import StyleProvider from '../../style-provider';

function useForceUpdate() {
  const [, setState] = useState({});
  const mounted = useRef(true);
  useEffect(() => {
    mounted.current = true;
    return () => {
      mounted.current = false;
    };
  }, []);
  return () => {
    if (mounted.current) {
      setState({});
    }
  };
}

export default function Fill(_ref) {
  let {
    name,
    children
  } = _ref;
  const {
    registerFill,
    unregisterFill,
    ...slot
  } = useSlot(name);
  const rerender = useForceUpdate();
  const ref = useRef({
    rerender
  });
  useEffect(() => {
    // We register fills so we can keep track of their existence.
    // Some Slot implementations need to know if there're already fills
    // registered so they can choose to render themselves or not.
    registerFill(ref);
    return () => {
      unregisterFill(ref);
    };
  }, [registerFill, unregisterFill]);

  if (!slot.ref || !slot.ref.current) {
    return null;
  }

  if (typeof children === 'function') {
    children = children(slot.fillProps);
  } // When using a `Fill`, the `children` will be rendered in the document of the
  // `Slot`. This means that we need to wrap the `children` in a `StyleProvider`
  // to make sure we're referencing the right document/iframe (instead of the
  // context of the `Fill`'s parent).


  const wrappedChildren = createElement(StyleProvider, {
    document: slot.ref.current.ownerDocument
  }, children);
  return createPortal(wrappedChildren, slot.ref.current);
}
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