@react-navigation/native/lib/module/ServerContainer.js

import * as React from 'react';
import { CurrentRenderContext } from '@react-navigation/core';
import ServerContext from './ServerContext';

/**
 * Container component for server rendering.
 *
 * @param props.location Location object to base the initial URL for SSR.
 * @param props.children Child elements to render the content.
 * @param props.ref Ref object which contains helper methods.
 */
export default /*#__PURE__*/React.forwardRef(function ServerContainer({
  children,
  location
}, ref) {
  React.useEffect(() => {
    console.error("'ServerContainer' should only be used on the server with 'react-dom/server' for SSR.");
  }, []);
  const current = {};

  if (ref) {
    const value = {
      getCurrentOptions() {
        return current.options;
      }

    }; // We write to the `ref` during render instead of `React.useImperativeHandle`
    // This is because `useImperativeHandle` will update the ref after 'commit',
    // and there's no 'commit' phase during SSR.
    // Mutating ref during render is unsafe in concurrent mode, but we don't care about it for SSR.

    if (typeof ref === 'function') {
      ref(value);
    } else {
      // @ts-expect-error: the TS types are incorrect and say that ref.current is readonly
      ref.current = value;
    }
  }

  return /*#__PURE__*/React.createElement(ServerContext.Provider, {
    value: {
      location
    }
  }, /*#__PURE__*/React.createElement(CurrentRenderContext.Provider, {
    value: current
  }, children));
});
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