Lessons
JavaScript · Expert
JavaScript · Expert. Ten lessons. Open-book quizzes. Lesson 1 free.
10 lessons · The Host · Lesson 1 free
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Lesson 1 · On the house
Workers
Move heavy work off the main thread.
Lesson 2
Proxy and Reflect
Intercept operations.
Lesson 3
Streams sketch
Backpressure-aware I/O.
Lesson 4
Security hygiene
XSS, injection, and trust boundaries.
Lesson 5
Performance profiling
Measure before you mythologize.
Lesson 6
Immutable update patterns
New objects instead of silent mutation.
Lesson 7
Type-aware JSDoc
Types without leaving JS files.
Lesson 8
Atomics sketch
Shared memory coordination.
Lesson 9
API design for libraries
Small surface, clear ownership.
Lesson 10
Expert capstone
Architecture notes for serious JS.
Sample certificate
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Certificate
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