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

UI components for WordPress.

import { useContext, useLayoutEffect, useRef } from "@wordpress/element";
import SlotFillContext from "./context";
function Fill({
  name,
  children
}) {
  const registry = useContext(SlotFillContext);
  const instanceRef = useRef({});
  const childrenRef = useRef(children);
  useLayoutEffect(() => {
    childrenRef.current = children;
  }, [children]);
  useLayoutEffect(() => {
    const instance = instanceRef.current;
    registry.registerFill(name, instance, childrenRef.current);
    return () => registry.unregisterFill(name, instance);
  }, [registry, name]);
  useLayoutEffect(() => {
    registry.updateFill(name, instanceRef.current, childrenRef.current);
  });
  return null;
}
export {
  Fill as default
};
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