context.tsx

import { useState, createContext, useContext } from 'react'

// Lift state up -> Levantar o estado
// Context API

// Prop Drilling

type CartContextType = {
  productsInCart: string[];
  addProductToCart: (name: string) => void;
}

const CartContext = createContext({} as CartContextType);

function ProductItem(props) {
  const { addProductToCart } = useContext(CartContext)

  return (
    <li>
      {props.name} 
      <button onClick={() => addProductToCart(props.name)}>
        Adicionar
      </button>
    </li>
  )
}

function ProductList(props) {
  return (
    <ul>
      <ProductItem name="Product 1" />
      <ProductItem name="Product 2" />
      <ProductItem name="Product 3" />
      <ProductItem name="Product 4" />
      <ProductItem name="Product 5" />
    </ul>
  );
}

function Cart(props) {
  const { productsInCart } = useContext(CartContext)

  return (
    <ul></ul>
  );
}



function App() {
  const [productsInCart, setProductsInCart] = useState([])

  function addProductToCart(product: string) {
    setProductsInCart([...productsInCart, product]);
  }

  return (
    <CartContext.Provider value={{ productsInCart, addProductToCart }}>
      <OutroContext.Provider value={{ productsInCart, addProductToCart }}>
        <MaisUmContext.Provider value={{ productsInCart, addProductToCart }}>
          <ProductList />
          <Cart />
        </MaisUmContext.Provider>
      </OutroContext.Provider>
    </CartContext.Provider>
  )
} 

Diegão monstro!!