Discover how React Tracked optimizes render performance in web apps. Build a to-do app using two methods, and gain skills to create advanced applications efficiently.

React Tracked is a small library for global state with React Hooks and
React Context. It allows you to develop a small web app with global state
without a bigger library like Redux.

In this course, you will create a to-do app. But before diving into
creating an application, you’ll first learn how React Tracked can solve
common performance issues around render optimization. Once you learn how to
work with this library, you’ll then build a to-do app through two different
methods.

By the end of this course, you will be ready to build more advanced
applications without having to do unnecessary re-rendering. You’ll also
have a nice piece to showcase in your portfolio.

React Tracked: Creating Web Apps with Global State

# React Context

While React Context can be used for global state, it is primitive. That's why there are various libraries around it, and React Tracked is one of them. The strength of React Tracked is Proxy-based tracking, but we don’t need this for smaller use cases.

# An alternative

Out of various libraries, [react-hooks-global-state](https://redux.js.org/style-guide/style-guide/) covers a small use case. It only allows you to specify a part of the global state by object keys and is hardly misused.

# Next

Finally, we wrap up our entire course.

In this lesson, we introduce an alternative library to React Tracked.

Creating a Counter App only with React Context

Introducing React Tracked to the Counter App

Developing ToDo App with React Tracked and useReducer

Developing ToDo App with React Tracked, useState and Immer

Going Further

Simpler Alternative

React Context