@dr.pogodin/react-helmet/build/module/Provider.js

Thread-safe Helmet for React 19+ and friends

import { createContext, useRef, useState } from 'react';
import { commitTagChanges } from './client';
import { IS_DOM_ENVIRONMENT } from './constants';
import { newServerState } from './server';
import { calcAggregatedState } from './utils';
import { jsx as _jsx } from "react/jsx-runtime";
export const Context = /*#__PURE__*/createContext(undefined);
const HelmetProvider = ({
  children,
  onServerState
}) => {
  const heapRef = useRef(null);
  if (heapRef.current === null) {
    const heap = {
      firstRender: true,
      helmets: [],
      state: undefined
    };
    if (onServerState) {
      heap.serverState ??= newServerState(heap);
      onServerState(heap.serverState);
    }
    heapRef.current = heap;
  }
  const heap_0 = heapRef.current;

  // eslint-disable-next-line react/hook-use-state
  const [contextValue] = useState(() => ({
    clientApply() {
      if (IS_DOM_ENVIRONMENT && !heap_0.state) {
        heap_0.state = calcAggregatedState(heap_0.helmets);
        if (heap_0.state.defer) {
          heap_0.nextAnimFrameId ??= requestAnimationFrame(() => {
            heap_0.state ??= calcAggregatedState(heap_0.helmets);
            commitTagChanges(heap_0.state, heap_0.firstRender);
            heap_0.firstRender = false;
            delete heap_0.nextAnimFrameId;
          });
        } else {
          if (heap_0.nextAnimFrameId !== undefined) {
            cancelAnimationFrame(heap_0.nextAnimFrameId);
            delete heap_0.nextAnimFrameId;
          }
          commitTagChanges(heap_0.state, heap_0.firstRender);
          heap_0.firstRender = false;
        }
      }
    },
    update(id, props) {
      const idx = heap_0.helmets.findIndex(item => item[0] === id);
      if (idx >= 0) {
        delete heap_0.state;
        if (props) heap_0.helmets[idx][1] = props;else heap_0.helmets.splice(idx, 1);
      } else if (props) {
        delete heap_0.state;
        heap_0.helmets.push([id, props]);
      }
    }
  }));
  return /*#__PURE__*/_jsx(Context, {
    value: contextValue,
    children: children
  });
};
export default HelmetProvider;
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