Zustand

In the previous post, I implemented a REACT app with Redux Toolkit, which is much better than Redux.

Let’s see what the same example looks like using Zustand. I think I will like this better, but who knows until we make the comparison?

Create React Application with Vite

> npm init vite zustand
Need to install the following packages:
  create-vite@3.1.0
Ok to proceed? (y)
✔ Select a framework: › React
✔ Select a variant: › TypeScript

> cd zustand
> npm install
> npm run dev
> open http://localhost:5173/

Implement Counter

Install dependencies

npm install zustand

Create Store and Use

WOW, this is way simpler!! One file.

// src/App.tsx
import { useState } from "react";
import create from "zustand";
import { devtools } from "zustand/middleware";
import "./App.css";

function App() {
  const [incrementAmount, setIncrementAmount] = useState("2");
  const mystore = useStore();
  const { count, increment, decrement, incrementByAmount } = useStore();
  return (
    <div class="App">
      <h1>Vite + React + Zustand</h1>
      <div class="card">
        <div class="button-bar">
          <button onClick={increment}>+</button>
          <button onClick={decrement}>-</button>
        </div>
        <p> count is {count}</p>
        <div class="button-bar">
          <input
            class="textbox"
            aria-label="Set increment amount"
            value={incrementAmount}
            onChange={(e) => setIncrementAmount(e.target.value)}
          />
          <button
            onClick={() => {
              incrementByAmount(Number(incrementAmount) || 0);
            }}
          >
            Add Amount
          </button>
        </div>
      </div>
    </div>
  );
}

export default App;

// define the store
interface AppStore {
  count: number;
  increment: () => void;
  decrement: () => void;
  incrementByAmount: (amount: number) => void;
}

export const useStore = create<AppStore>()(
  devtools((set) => ({
    count: 0,
    increment: () => {
      set((state) => ({ count: state.count + 1 }));
    },
    decrement: () => {
      set((state) => ({ count: state.count - 1 }));
    },
    incrementByAmount: (amount: number) => {
      set((state) => ({ count: state.count + amount }));
    },
  }))
);

Here is the CSS

/* src/App.css */
#root {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem;
    text-align: center;
}

.logo {
    height: 6em;
    padding: 1.5em;
    will-change: filter;
}

.logo:hover {
    filter: drop-shadow(0 0 2em #646cffaa);
}

.logo.react:hover {
    filter: drop-shadow(0 0 2em #61dafbaa);
}

@keyframes logo-spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: no-preference) {
    a:nth-of-type(2) .logo {
        animation: logo-spin infinite 20s linear;
    }
}

.card {
    padding: 2em;
}

.read-the-docs {
    color: #888;
}

.button-bar {
    display: flex;
    gap: 5px;
    justify-content: center;
}

.textbox {
    font-size: 32px;
    padding: 2px;
    width: 64px;
    text-align: center;
    margin-right: 8px;
}

/* src/index.css */
:root {
    font-family: Inter, Avenir, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 24px;
    font-weight: 400;

    color-scheme: light dark;
    color: rgba(255, 255, 255, 0.87);
    background-color: #242424;

    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
}

a {
    font-weight: 500;
    color: #646cff;
    text-decoration: inherit;
}

a:hover {
    color: #535bf2;
}

body {
    margin: 0;
    display: flex;
    place-items: center;
    min-width: 320px;
    min-height: 100vh;
}

h1 {
    font-size: 3.2em;
    line-height: 1.1;
}

button {
    border-radius: 8px;
    border: 1px solid transparent;
    padding: 0.6em 1.2em;
    font-size: 1em;
    font-weight: 500;
    font-family: inherit;
    background-color: #1a1a1a;
    cursor: pointer;
    transition: border-color 0.25s;
}

button:hover {
    border-color: #646cff;
}

@media (prefers-color-scheme: light) {
    :root {
        color: #213547;
        background-color: #ffffff;
    }

    a:hover {
        color: #747bff;
    }

    button {
        background-color: #f9f9f9;
    }
}