#javascript

vitest.config.ts diff showing clearMocks changing from its old false default to Vitest 5's new true default

Fix Vitest 5 clearMocks Breaking Mock State

Fix Vitest 5's clearMocks: true default wiping mock call history between tests, and decide whether to restore it or fix the test.

Aug 13, 2026Read more →

Command-line diff showing vitest run from a subdirectory failing to find a parent config, fixed by adding an explicit --config flag

Guides & Fixes

Fix Vitest 5 Config Not Found in Parent Directory

Fix Vitest 5 no longer finding a vitest.config.ts in a parent directory when run from a subdirectory. Pass --config explicitly.

Aug 13, 2026Read more →

Code diff showing test.sequential and describe.sequential calls replaced with the concurrent: false option in Vitest 5

Guides & Fixes

Fix Vitest 5 test.sequential Removed Error

Fix Vitest 5 removing test.sequential, describe.sequential, and the sequential option. Replace them with concurrent: false.

Aug 13, 2026Read more →

Terminal output showing Vitest's documented error: 1 call in calculator.test.ts was defined outside of the module's top level scope, pointing at a nested vi.mock call

Guides & Fixes

Fix Vitest 5 vi.mock Top-Level Scope Error

Fix Vitest 5's "defined outside of the module's top level scope" error thrown by vi.mock, vi.unmock, and vi.hoisted.

Aug 13, 2026Read more →

A terminal window showing a Python requests.get call being rewritten as a JavaScript fetch call, above the real Zapier warning not to use fetch for authenticated calls

Data & Automation

Migrate Zapier Functions Python Code to fetch()

Zapier Functions shuts down September 1, 2026. Migrate Python requests calls to fetch() in Code by Zapier, except authenticated calls, handled differently.

Aug 13, 2026Read more →

A dark comparison-matrix style cover listing Vitest 5.0 beta's breaking changes across three groups: mocking (vi.mock scope, clearMocks default flip), config (projects inheritance, parent-directory lookup), and assertions (expect.poll, async awaits, toThrow(''))

Guides & Fixes

Vitest 5.0 Beta Breaking Changes: Full Guide

Vitest 5.0 beta ships 10 breaking changes across mocking, config, and assertions. Full rundown, sourced to the official migration guide, plus fixes.

Aug 13, 2026Read more →

Diagram of a details/summary dropdown menu with an X marking a click outside it, and an arrow showing the dropdown closing in response

Guides & Fixes

Fixing <details> Dropdowns That Won't Close on Outside Click

Native <details>/<summary> dropdowns only toggle via their own <summary>. Click anywhere else and it stays open. Here's the small, dependency-free fix.

Jul 30, 2026Read more →