react-native-mapsforge-vtm/lib/module/compose/useRefState.js

React Native components to build vector maps using Mapsforges fork of vtm. Offline rendering of OpenStreetMap data. Android only

"use strict";

/**
 * External dependencies
 */
import { useRef } from 'react';

/**
 * Like useState, returns a stateful value, and a function to update it.
 * But uses a ref instead of a state.
 * Like this react manages to "update the state" of many sibling components concurrently. Well, it's not updating the state actually, it's updating the ref.
 */
const useRefState = initial => {
  const stateRef = useRef(initial);
  return [stateRef?.current, newVal => {
    stateRef.current = newVal;
  }];
};
export default useRefState;
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