state update function batching react code example

Example 1: state with react functions

import React, { useState } from 'react';

function Example() {
  // Declare a new state variable, which we'll call "count"
  const [count, setCount] = useState(0);

  return (
    

      
You clicked {count} times
       setCount(count + 1)}>
        Click me
      
    
  );
}

Example 2: redux action to hit api and assign data in stateless component

export function fetchProducts() {
  return dispatch => {
    dispatch(fetchProductsBegin());
    return fetch("/products")
      .then(handleErrors)
      .then(res => res.json())
      .then(json => {
        dispatch(fetchProductsSuccess(json.products));
        return json.products;
      })
      .catch(error => dispatch(fetchProductsFailure(error)));
  };
}

// Handle HTTP errors since fetch won't.
function handleErrors(response) {
  if (!response.ok) {
    throw Error(response.statusText);
  }
  return response;
}