Module 3: JavaScript Fundamentals

MODULE 03 · 5 LESSONS

Learn the language and browser APIs through state, events, data transformation and asynchronous requests.

Project checkpoint: Build a persistent learning tracker that loads and saves data safely.

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Module 3 learning loop

Module 3 learning loop: a practical sequence used in this lesson.

Write predictable functions with clear inputs, outputs and branching.
Combine rendering, events, validation, storage and error handling in a complete browser application.
Use primitive values, scope, functions in one coherent implementation.
Complete this evidence-backed checkpoint: Build a persistent learning tracker that loads and saves data safely.

Lesson 3.1

Write predictable functions with clear inputs, outputs and branching.

Lesson 3.2

Model application data and transform it without accidental mutation.

Lesson 3.3

Connect user intent to safe, minimal DOM changes.

Lesson 3.4

Handle loading, success, empty and failure states around network calls.

Lesson 3.5

Combine rendering, events, validation, storage and error handling in a complete browser application.

PROJECT CHECKPOINT

Build a persistent learning tracker that loads and saves data safely.

Write acceptance criteria for primitive values before implementation.
Keep the change small enough that a reviewer can connect it to the intended behavior.
Use the most direct check available for scope and save the result.
Record one decision you would keep and one you would revisit after feedback.

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