Development · Intermediate
Async interfaces without surprises
A dependency-free search application with a reproducible out-of-order response bug. Trace request ownership, repair stale updates, handle validation and retries, and prove the fix with deterministic tests.
Written by Akis Apostoliadis for Skillfolio · 4 written lessons · Self-paced
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Course price: $89 USD, plus applicable tax. One payment for this course. Compare all-course package prices: $29/month or $299 lifetime.
What you’ll make
A runnable search interface with latest-intent ownership, validated responses, captured retry intent and a proven race-condition repair.
Before you begin
JavaScript functions, promises, async/await and DOM events. Node.js 18+ runs both the supplied local server and the tests. No framework, account or API key required.
Who it’s for
Developers comfortable with JavaScript promises and DOM rendering.
- Async state
- AbortController
- Race conditions
The complete curriculum
Preview the first lesson free. Purchase unlocks the remaining lessons, project and downloads.
Reproduce the race before choosing the repair
Model draft, submitted and displayed intent and predict stale success, stale failure and cleanup races.
15 min read · 40 min practice · Free preview
Implement ownership across the complete request
Run and explain a complete latest-intent model that guards all asynchronous writes and survives disposal.
15 min read · 75 min practice · Included with purchase
Validate the response and retry the right intention
Distinguish empty, invalid and failed responses and implement recovery from a captured request intent.
16 min read · 60 min practice · Included with purchase
Prove the repair, then transfer it to another filter
Use deterministic failure reproduction and exact assertions to verify the repair and transfer request ownership to a new filter.
17 min read · 60 min practice · Included with purchase
See the work
Keep the newest request in control. Completed instructor specimen using fictional teaching material; not a learner result.This course works towards: A runnable search interface with latest-intent ownership, validated responses, captured retry intent and a proven race-condition repair.
Explore completed teaching examples and the decisions behind them. These are instructor-authored examples, not learner testimonials.
What’s included
- Original written lessons, worked examples and guided practice.
- A course project, review criteria and reference responses.
- Downloadable course materials for purchased lessons.
Explore the course before committing. Start with the free lesson, or compare other courses.