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WEB DEVELOPMENT — COHORT 2026

Module 4 · State and effects in React

Lesson 3 of 6 · Prof. Daniel Objío · 68 students in your cohort

46% of the module

Lesson 3 — State and effects

VIDEO · 38:10

14:2238:10

Estado y efectos en React

Lesson 3 of 6 · 14:22 of 38:10 · resume where you left off

Module 4 — Lessons

6 LESSONS

1 · The React state modelVideo · 22:40Done

2 · useState in depthVideo · 31:05Done

3 · State and effectsVideo · 38:10 · at 14:22Playing

4 · The useEffect hookVideo · 27:18Locked

5 · Effects and remote dataReading · 12 minLocked

6 · Project — a stateful boardAssignment · hand-in 2Locked

Your progress

68% OVERALL

Módulo 1 — Fundamentos100%

Módulo 2 — HTML/CSS98%

Módulo 3 — JavaScript91%

Módulo 4 — React46%

Módulo 5 — APIs4%

Upcoming deadlines

Assignment 2 — Stateful componentsModule 4 · due Thursday 28 · 11:59 pmDue soon

Quiz — Module 415 questions · unlocks after lesson 6Upcoming

Live session — Thursday 19:0041 classmates confirmedScheduled

Your current grade

86.4

Assignments handed in

10 / 11

Module

4 / 9

Course forum — Module 4

9 OPEN QUESTIONSAsk a question

Why does my useEffect run twice in strict mode?Génesis Polanco · 2 h ago4 replies

"Too many re-renders" on assignment 2Ronny Almánzar · 40 min ago2 replies

Derived state vs useMemo — when to use each?Elvin Batista · yesterday7 replies

Sample interface. Every figure, name and record on this page is invented and nothing here is wired to a backend — it exists so you can see the shape of the system before we build yours.