Add "Quick Start" pages and update installation instructions

Author: markerikson

docs/introduction/getting-started.md

@@ -21,10 +21,14 @@ React Redux 7.1+ requires **React 16.8.3 or later**, in order to make use of Rea
 
 ### Using Create React App
 
-The recommended way to start new apps with React Redux is by using the [official Redux+JS template](https://github.com/reduxjs/cra-template-redux) for [Create React App](https://github.com/facebook/create-react-app), which takes advantage of [Redux Toolkit](https://redux-toolkit.js.org/).
+The recommended way to start new apps with React and Redux is by using the [official Redux+JS template](https://github.com/reduxjs/cra-template-redux) or [Redux+TS template](https://github.com/reduxjs/cra-template-redux-typescript) for [Create React App](https://github.com/facebook/create-react-app), which takes advantage of **[Redux Toolkit](https://redux-toolkit.js.org/)** and React Redux's integration with React components.
 
-```sh
+```bash
+# Redux + Plain JS template
 npx create-react-app my-app --template redux
+
+# Redux + TypeScript template
+npx create-react-app my-app --template redux-typescript
 ```
 
 ### An Existing React App
@@ -41,14 +45,12 @@ yarn add react-redux
 
 You'll also need to [install Redux](https://redux.js.org/introduction/installation) and [set up a Redux store](https://redux.js.org/recipes/configuring-your-store/) in your app.
 
-If you are using TypeScript, the React Redux types are maintained separately in DefinitelyTyped. You'll need to install those as well:
+If you are using TypeScript, the React Redux types are maintained separately in DefinitelyTyped, but included as a dependency of the `react-redux` package, so they should be installed automatically. If you still need to install them manually, run:
 
 ```bash
 npm install @types/react-redux
 ```
 
-The code used for this example is based on the [official Redux template](https://github.com/reduxjs/cra-template-redux). Additionally, the same code template for TypeScript can be found [here](https://github.com/reduxjs/cra-template-redux-typescript).
-
 ## API Overview
 
 ### `Provider`

docs/tutorials/quick-start.md

@@ -0,0 +1,221 @@
+---
+id: quick-start
+title: Quick Start
+sidebar_label: Quick Start
+hide_title: true
+---
+
+ 
+
+# React Redux Quick Start
+
+:::tip What You'll Learn
+
+- How to set up and use Redux Toolkit with React Redux
+
+:::
+
+:::info Prerequisites
+
+- Familiarity with [ES6 syntax and features](https://www.taniarascia.com/es6-syntax-and-feature-overview/)
+- Knowledge of React terminology: [JSX](https://reactjs.org/docs/introducing-jsx.html), [State](https://reactjs.org/docs/state-and-lifecycle.html), [Function Components, Props](https://reactjs.org/docs/components-and-props.html), and [Hooks](https://reactjs.org/docs/hooks-intro.html)
+- Understanding of [Redux terms and concepts](https://redux.js.org/tutorials/fundamentals/part-2-concepts-data-flow)
+
+:::
+
+## Introduction
+
+Welcome to the React Redux Quick Start tutorial! **This tutorial will briefly introduce you to React Redux and teach you how to start using it correctly**.
+
+### How to Read This Tutorial
+
+This page will focus on just how to set up a Redux application with Redux Toolkit and the main APIs you'll use. For explanations of what Redux is, how it works, and full examples of how to use Redux Toolkit, see [the Redux core docs tutorials](https://redux.js.org/tutorials/index).
+
+For this tutorial, we assume that you're using Redux Toolkit and React Redux together, as that is the standard Redux usage pattern. The examples are based on [a typical Create-React-App folder structure](https://create-react-app.dev/docs/folder-structure) where all the application code is in a `src`, but the patterns can be adapted to whatever project or folder setup you're using.
+
+The [Redux+JS template for Create-React-App](https://github.com/reduxjs/cra-template-redux) comes with this same project setup already configured.
+
+## Usage Summary
+
+### Install Redux Toolkit and React Redux
+
+Add the Redux Toolkit and React Redux packages to your project:
+
+```sh
+npm install @reduxjs/toolkit react-redux
+```
+
+### Create a Redux Store
+
+Create a file named `src/app/store.js`. Import the `configureStore` API from Redux Toolkit. We'll start by creating an empty Redux store, and exporting it:
+
+```js title="app/store.js"
+import { configureStore } from '@reduxjs/toolkit'
+
+export default configureStore({
+  reducer: {},
+})
+```
+
+This creates a Redux store, and also automatically configure the Redux DevTools extension so that you can inspect the store while developing.
+
+### Provide the Redux Store to React
+
+Once the store is created, we can make it available to our React components by putting a React Redux `<Provider>` around our application in `src/index.js`. Import the Redux store we just created, put a `<Provider>` around your `<App>`, and pass the store as a prop:
+
+```js title="index.js"
+import React from 'react'
+import ReactDOM from 'react-dom'
+import './index.css'
+import App from './App'
+// highlight-start
+import store from './app/store'
+import { Provider } from 'react-redux'
+// highlight-end
+
+ReactDOM.render(
+  // highlight-next-line
+  <Provider store={store}>
+    <App />
+  </Provider>,
+  document.getElementById('root')
+)
+```
+
+### Create a Redux State Slice
+
+Add a new file named `src/features/counter/counterSlice.js`. In that file, import the `createSlice` API from Redux Toolkit.
+
+Creating a slice requires a string name to identify the slice, an initial state value, and one or more reducer functions to define how the state can be updated. Once a slice is created, we can export the generated Redux action creators and the reducer function for the whole slice.
+
+Redux requires that [we write all state updates immutably, by making copies of data and updating the copies](https://redux.js.org/tutorials/fundamentals/part-2-concepts-data-flow#immutability). However, Redux Toolkit's `createSlice` and `createReducer` APIs use [Immer](https://immerjs.github.io/immer/) inside to allow us to [write "mutating" update logic that becomes correct immutable updates](https://redux.js.org/tutorials/fundamentals/part-8-modern-redux#immutable-updates-with-immer).
+
+```js title="features/counter/counterSlice.js"
+import { createSlice } from '@reduxjs/toolkit'
+
+export const counterSlice = createSlice({
+  name: 'counter',
+  initialState: {
+    value: 0,
+  },
+  reducers: {
+    increment: (state) => {
+      // Redux Toolkit allows us to write "mutating" logic in reducers. It
+      // doesn't actually mutate the state because it uses the Immer library,
+      // which detects changes to a "draft state" and produces a brand new
+      // immutable state based off those changes
+      state.value += 1
+    },
+    decrement: (state) => {
+      state.value -= 1
+    },
+    incrementByAmount: (state, action) => {
+      state.value += action.payload
+    },
+  },
+})
+
+// Action creators are generated for each case reducer function
+export const { increment, decrement, incrementByAmount } = counterSlice.actions
+
+export default counterSlice.reducer
+```
+
+### Add Slice Reducers to the Store
+
+Next, we need to import the reducer function from the counter slice and add it to our store. By defining a field inside the `reducers` parameter, we tell the store to use this slice reducer function to handle all updates to that state.
+
+```js title="app/store.js"
+import { configureStore } from '@reduxjs/toolkit'
+// highlight-next-line
+import counterReducer from '../features/counter/counterSlice'
+
+export default configureStore({
+  reducer: {
+    // highlight-next-line
+    counter: counterReducer,
+  },
+})
+```
+
+### Use Redux State and Actions in React Components
+
+Now we can use the React Redux hooks to let React components interact with the Redux store. We can read data from the store with `useSelector`, and dispatch actions using `useDispatch`. Create a `src/features/counter/Counter.js` file with a `<Counter>` component inside, then import that component into `App.js` and render it inside of `<App>`.
+
+```jsx title="features/counter/Counter.js"
+import React, { useState } from 'react'
+import { useSelector, useDispatch } from 'react-redux'
+import { decrement, increment } from './counterSlice'
+import styles from './Counter.module.css'
+
+export function Counter() {
+  const count = useSelector((state) => state.counter.value)
+  const dispatch = useDispatch()
+
+  return (
+    <div>
+      <div>
+        <button
+          aria-label="Increment value"
+          onClick={() => dispatch(increment())}
+        >
+          Increment
+        </button>
+        <span>{count}</span>
+        <button
+          aria-label="Decrement value"
+          onClick={() => dispatch(decrement())}
+        >
+          Decrement
+        </button>
+      </div>
+    </div>
+  )
+}
+```
+
+Now, any time you click the "Increment" and "Decrement buttons:
+
+- The corresponding Redux action will be dispatched to the store
+- The counter slice reducer will see the actions and update its state
+- The `<Counter>` component will see the new state value from the store and re-render itself with the new data
+
+## What You've Learned
+
+That was a brief overview of how to set up and use Redux Toolkit with React. Recapping the details:
+
+:::tip Summary
+
+- **Create a Redux store with `configureStore`**
+  - `configureStore` accepts a `reducer` function as a named argument
+  - `configureStore` automatically sets up the store with good default settings
+- **Provide the Redux store to the React application components**
+  - Put a React Redux `<Provider>` component around your `<App />`
+  - Pass the Redux store as `<Provider store={store}>`
+- **Create a Redux "slice" reducer with `createSlice`**
+  - Call `createSlice` with a string name, an initial state, and named reducer functions
+  - Reducer functions may "mutate" the state using Immer
+  - Export the generated slice reducer and action creators
+- **Use the React Redux `useSelector/useDispatch` hooks in React components**
+  - Read data from the store with the `useSelector` hook
+  - Get the `dispatch` function with the `useDispatch` hook, and dispatch actions as needed
+
+:::
+
+### Full Counter App Example
+
+The counter example app shown here is also the
+
+Here's the complete counter application as a running CodeSandbox:
+
+<iframe
+  class="codesandbox"
+  src="https://codesandbox.io/embed/github/reduxjs/redux-essentials-counter-example/tree/master/?fontsize=14&hidenavigation=1&module=%2Fsrc%2Ffeatures%2Fcounter%2FcounterSlice.js&theme=dark&runonclick=1"
+  title="redux-essentials-example"
+  allow="geolocation; microphone; camera; midi; vr; accelerometer; gyroscope; payment; ambient-light-sensor; encrypted-media; usb"
+  sandbox="allow-modals allow-forms allow-popups allow-scripts allow-same-origin"
+></iframe>
+
+## What's Next?
+
+We recommend going through [**the "Redux Essentials" and "Redux Fundamentals" tutorials in the Redux core docs**](https://redux.js.org/tutorials/index), which will give you a complete understanding of how Redux works, what Redux Toolkit and React Redux do, and how to use it correctly.