Understanding Modern JavaScript Frameworks (The First Hour)

Published: 24 November 2025
on channel: Tony Alicea
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The first full hour of my new course: Understanding Modern JavaScript Frameworks.
Learn how modern frameworks really work under the hood: components, state, DOM updates, events, templating, the client/server boundary, and more.

In the full course, we go even deeper:

Signals and reactive primitives
Virtual DOMs
Hydration
Resumability
SSR and SSG
Routing
Compilers and Optimizers
Deep dives under-the-hood and into the internals of React, Vue, Svelte, Solid, Qwik, Angular, TanStack Start, and more.

Grow from dev → lead → architect with deep fundamental knowledge and stop framework fatigue.

Chapters:
00:00 Introduction
01:57 Course Starts
04:12 Setup
05:51 Creating a User Interface on the Web
06:54 HTML, Trees, and the DOM
11:08 DOM Manipulation
19:15 Events
32:41 HTTP and the Client/Server Boundary
33:22 HTTP and Text
38:58 Crossing the Client/Server Boundary
41:10 Stack Dive Challenge
43:00 Components, Trees, and State
43:18 Subtrees
45:38 Conceptual Aside: Stateful vs Stateless
49:32 Components
53:40 State and State Management
59:11 Templating, Interpolation, and Logic
01:05:07 Stack Dive Challenge
01:08:04 What's Next in the Course


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