vue-debug-guides

Comprehensive Vue 3 debugging reference covering reactivity, components, templates, lifecycle, SSR, and 100+ common runtime issues.

- Organized by feature area (reactivity, computed, watchers, components, templates, forms, lifecycle, SSR, TypeScript, and more) with direct links to specific error scenarios and fixes

- Covers Vue 3 specific gotchas including ref unwrapping, proxy identity hazards, v-model composition events, template ref timing, and hydration mismatches

- Addresses async patterns, watcher cleanup, lifecycle hook timing, and memory leak prevention across composables and event listeners

- Includes SSR and TypeScript debugging guidance for universal code, type safety with generics, and cross-request state pollution

Vue 3 debugging and error handling for runtime issues, warnings, async failures, and hydration bugs.
For development best practices and common gotchas, use vue-best-practices.

Reactivity

- Tracing unexpected re-renders and state updates → See reactivity-debugging-hooks

- Ref values not updating due to missing .value access → See ref-value-access

- State stops updating after destructuring reactive objects → See reactive-destructuring

- Refs inside arrays, Maps, or Sets not unwrapping → See refs-in-collections-need-value

- Nested refs rendering as [object Object] in templates → See template-ref-unwrapping-top-level

- Reactive proxy identity comparisons always return false → See reactivity-proxy-identity-hazard

- Third-party instances breaking when proxied → See reactivity-markraw-for-non-reactive

- Watchers only firing once per tick unexpectedly → See reactivity-same-tick-batching

Computed

- Computed getter triggers mutations or requests unexpectedly → See computed-no-side-effects

- Mutating computed values causes changes to disappear → See computed-return-value-readonly

- Computed value never updates after conditional logic → See computed-conditional-dependencies

- Sorting or reversing arrays breaks original state → See computed-array-mutation

- Passing parameters to computed properties fails → See computed-no-parameters