Get lifetime access to the full 16.5 hour course here!: https://understandingreact.com Section "useReducer (Part 2)" at 5:39:02 has no sound (the rest of the video does!). You can watch that section with sound here: https://dontimitateunderstand.com/courses/understanding-react/lectures/46000855 PPP Request form: https://anthonyalicea.com/courses/understanding-react-ppp/ 0:00 Introduction 2:52 Setup 4:43 A Basic React App 6:50 The React Source Code 8:56 SECTION: The DOM and Declarative Programming 9:17 HTML and Trees 11:17 HTML, The Browser, and the DOM 15:20 DOM Manipulation 21:53 Conceptual Aside: Imperative vs Declarative Programming 24:53 The DOM and Imperative Programming 28:05 The DOM and Declarative Programming 32:13 SECTION: React Elements 32:39 Conceptual Aside: Recursion 36:56 Conceptual Aside: POJOs 49:49 Creating React Elements 1:01:25 React Element Trees 1:06:50 Conceptual Aside: DOM Element References 1:08:22 React Elements and DOM Elements 1:14:23 React DOM Updates 1:26:37 Components 1:32:39 Components and Reusability 1:43:45 Conceptual Aside: Pure Functions 1:49:04 Props 2:01:28 Template Logic 2:15:40 Element Properties 2:22:58 SECTION: JSX 2:23:19 Conceptual Aside: Markup and Tree Creation Shorthand 2:25:13 Conceptual Aside: Transformation 2:27:02 React Elements and JSX 2:46:44 JSX and Thinking In Elements 2:58:43 Conceptual Aside: HTML Authoring 3:01:32 Fragment and HTML authoring 3:11:36 SECTION: Fiber and Reconciliation 3:12:18 Root Creation and render 3:21:15 Conceptual Aside: Trees and Linked Lists 3:25:36 Fiber, Fiber Nodes, and Fiber Trees 3:32:33 Conceptual Aside: Tree Reconciliation and the Tree Edit Distance Problem 3:36:18 Work-In-Progress Nodes 3:45:49 Reconciliation and Work 3:51:35 SECTION: Execution Contexts 3:51:56 Conceptual Aside: Execution Contexts and the Event Loop 3:55:39 Fiber and Custom Execution Contexts 3:59:54 Units of Work and The Work Loop 4:02:53 Conceptual Aside: Equality 4:06:27 Beginning, Completing, Bailing Out and Pausing Work 4:13:28 Lanes and Priority 4:16:04 SECTION: React DOM and Rendering 4:16:19 Committing Work and The Renderer 4:19:13 Mounting, Updating, and Unmounting 4:24:02 SECTION: Events 4:24:26 DOM Events 4:36:03 React Event Objects 4:43:54 Synthetic Event Properties and Methods 4:49:38 SECTION: State 4:49:55 Conceptual Aside: State Machines 4:56:32 Conceptual Aside: Pure Functions (again) 4:59:13 UI: A Function of State 5:01:59 Conceptual Aside: Reducers 5:08:31 Actions and State 5:17:26 SECTION: Hooks and State 5:17:51 Fibers, Hooks, and State 5:21:57 Conceptual Aside: Queues 5:25:50 Update Queues 5:28:37 State and Re-renders 5:31:15 useReducer (Part 1) 5:39:02 useReducer (Part 2) 5:45:08 useState (Part 1) 5:49:24 useState (Part 2) 6:00:10 Rules of Hooks 6:07:55 Enroll in the Full Course