dispatch in react redux code example

Example 1: using redux with hooks

import React from "react";
import { useDispatch, useSelector } from "react-redux";
import { addCount } from "./store/counter/actions";

export const Count = () => {
  const count = useSelector(state => state.counter.count);
  const dispatch = useDispatch();

  return (
    <main>
      <div>Count: {count}</div>
      <button onClick={() => dispatch(addCount())}>Add to count</button>
    </main>
  );
};

Example 2: what is dispatch in redux

function dispatch(action) {
  // check that the action argument is an object
  if (typeof action !== 'object' || obj === null) {
    throw new Error('actions must be plain object.');
  }

  // check that the action object has a 'type' property
  if (typeof action.type === 'undefined') {
    throw new Error('Actions may not have an undefined "type" property.');
  }

  // call the reducer and pass in currentState and action
  reducer(currentState, action);
}