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

UI components for WordPress.

/**
 * External dependencies
 */

/**
 * WordPress dependencies
 */
import { useObservableValue } from '@wordpress/compose';
import { useContext, useLayoutEffect, useRef, Children, cloneElement, isEmptyElement } from '@wordpress/element';

/**
 * Internal dependencies
 */
import SlotFillContext from './context';
import { Fragment as _Fragment, jsx as _jsx } from "react/jsx-runtime";
/**
 * Whether the argument is a function.
 *
 * @param maybeFunc The argument to check.
 * @return True if the argument is a function, false otherwise.
 */
function isFunction(maybeFunc) {
  return typeof maybeFunc === 'function';
}
function addKeysToChildren(children) {
  return Children.map(children, (child, childIndex) => {
    if (!child || typeof child === 'string') {
      return child;
    }
    let childKey = childIndex;
    if (typeof child === 'object' && 'key' in child && child?.key) {
      childKey = child.key;
    }
    return cloneElement(child, {
      key: childKey
    });
  });
}
function Slot(props) {
  var _useObservableValue;
  const registry = useContext(SlotFillContext);
  const instanceRef = useRef({});
  const {
    name,
    children,
    fillProps = {}
  } = props;
  useLayoutEffect(() => {
    const instance = instanceRef.current;
    registry.registerSlot(name, instance);
    return () => registry.unregisterSlot(name, instance);
  }, [registry, name]);
  let fills = (_useObservableValue = useObservableValue(registry.fills, name)) !== null && _useObservableValue !== void 0 ? _useObservableValue : [];
  const currentSlot = useObservableValue(registry.slots, name);

  // Fills should only be rendered in the currently registered instance of the slot.
  if (currentSlot !== instanceRef.current) {
    fills = [];
  }
  const renderedFills = fills.map(fill => {
    const fillChildren = isFunction(fill.children) ? fill.children(fillProps) : fill.children;
    return addKeysToChildren(fillChildren);
  }).filter(
  // In some cases fills are rendered only when some conditions apply.
  // This ensures that we only use non-empty fills when rendering, i.e.,
  // it allows us to render wrappers only when the fills are actually present.
  element => !isEmptyElement(element));
  return /*#__PURE__*/_jsx(_Fragment, {
    children: isFunction(children) ? children(renderedFills) : renderedFills
  });
}
export default Slot;
//# sourceMappingURL=slot.js.map