Udemy

React: A Quick Understanding (Deep Dive JumpStart < 2 Hours)

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  • 1,412 Students
  • Updated 7/2025
4.6
(220 Ratings)
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Course Information

Registration period
Year-round Recruitment
Course Level
Study Mode
Duration
1 Hour(s) 50 Minute(s)
Language
English
Taught by
Anthony Alicea
Rating
4.6
(220 Ratings)
1 views

Course Overview

React: A Quick Understanding (Deep Dive JumpStart

A quick deep dive mini bootcamp - React 19, JSX, Components, Hooks, use, Data Fetching, Suspense, AI and LLM generation

Master an accurate React mental model in record time! Don't just copy code. Understand React.

Most React tutorials teach you to type along like a robot. You end up with working code but no real understanding of why it works. When bugs appear, or your faced with challenges you didn't see in the projects you imitated, you're stuck.

This course is different. Build an accurate mental model of React's core concepts so you can debug faster, make better architectural decisions, write clean maintainable code, and direct an LLM properly to generate React code.

What You'll Learn

Components & JSX

  • What components really are and why they must be "pure"

  • How JSX works under the hood and why its rules exist

  • What props are and how they work

  • Writing semantic, maintainable component markup

Reconciliation and the Fiber Tree

  • How React works under-the-hood

  • Where React actually stores information

Hooks

  • useState: Why immutability matters and how React detects changes

  • useReducer: When to choose reducers over simple state

Modern Data Fetching

  • Master React 19's new use hook for clean async code

  • Understand Suspense boundaries

AI and LLM Prompting

  • Use your knowledge to properly prompt an AI

  • Get the best results from an LLM generating React apps


I've read all of React's source code, and have given popular talks at React Summit (the world's biggest React conference). Join me in understanding React!


Prerequisites

  • Basic JavaScript (functions, objects, arrays)

  • HTML and CSS familiarity

  • No prior React experience required

Course Content

  • 6 section(s)
  • 29 lecture(s)
  • Section 1 Introduction
  • Section 2 Components and JSX
  • Section 3 React Elements, The Fiber Tree, and Reconciliation
  • Section 4 State, Hooks, and Data Fetching
  • Section 5 React, AI, and LLMs
  • Section 6 Conclusion

What You’ll Learn

  • Build functional React components that accept props and return JSX to create reusable UI building blocks.
  • Understand what the Fiber Tree and Reconciliation are
  • Write JSX syntax correctly and understand the basic rules for creating component markup that React can render.
  • Understand what hooks really are and state hooks in React
  • Fetch data using React 19's new use hook and display loading states with Suspense boundaries.
  • Instruct an AI to generate React code


Reviews

  • N
    Nextstep Creatives
    4.5

    It refreshes my understanding the implementation and purpose of components, hooks, states also on event listeners. Glad to have and benefited this course.

  • K
    Kalven Kang
    4.5

    I'm starting to understand React's fundamentals and how it operates.

  • L
    Les McGrath
    5.0

    This was a refresher for me. I'd never done much under-the-hood stuff before for React. I wasn't expecting that for a short course. Great stuff.

  • D
    Dave Engle
    5.0

    This course is excellent for a person who understands programming and is looking for a quick overview on how react works. I was a little disappointed by the commercial at the for expensive courses outside of Udemy. I already pay a lot for a Udemy subscription so I don't like being directed to courses outside the platform. Especially from a talented presenter like Tony. I will take more of his Udemy courses going forward and hope he continues to update and deliver more courses on this platform

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