Pathwise

Manuals / JavaScript / Checkpoint 12

E · Deep JS · advanced · Gate · Week 9–10 · Checkpoint 12 of 14

Checkpoint B — Async, modules & tests

Prove you can ship a modular async app with tests and explain the event loop. This is the bar for "I know JavaScript" on a resume or in a QA automation interview.

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Step 1 of 3

Pass criteria

  • Vite project with api/render/main module split
  • Fetch app with loading, success, error, retry states
  • 10+ Vitest tests, all green via npm run test:run
  • Can explain event loop order (sync → microtasks → macrotask) without notes
  • Can explain closure with createCounter example
  • GitHub repo with README, meaningful commit history
Pass criteriaDrag stickies · tap for tips
Study mapDrag stickies · tap for tipsKeep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Assert the UIdrag · tap →Retry wiselydrag · tap →Seed datadrag · tap →Close the loopdrag · tap →Keep it shortdrag · tap →Name the waitdrag · tap →Scope locatorsdrag · tap →Trace when stuckdrag · tap →One browser firstdrag · tap →Isolate statedrag · tap →Pathwise hackdrag · tap →Pass criteriadrag · tap →Try thisdrag · tap →Follow the dashed drag · tap →

Do this now

Verify every item. Fix gaps this week.

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Chapter learning outcomes
  • Integration readiness
  • Interview prep

Clear these before you leave

Side quest

Green demo

Screen record: run dev server, demo fetch app, run tests green. Save link or file for portfolio.