@barguide/react-hooks/src/useEmitter.ts

TypeScript | React Hooks

import { useEffect, useState } from 'react';

import { emitter } from './utils';

/**
 * @name useCheckoutLoader
 * @description We use the "effect" hook to add/remove an "emitter" instance
 * to our Modal component. By passing the "setter" from our React State we
 * can get a live subscription to the state state
 */
const useEmitter = (
  event: string,
  callback?: any,
  initialValue: any = false
) => {
  const [state, setState] = useState(initialValue);

  const onEventCallback = (value = !state) => {
    setState(value);
    if (typeof callback === 'function') callback(value);
  };

  useEffect(() => {
    emitter.addListener(event, onEventCallback);

    return () => {
      emitter.removeListener(event, onEventCallback);
    };
  });

  return [state, setState];
};

export { useEmitter };