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Vue 3 debugging and error handling for runtime errors, warnings, async failures, and SSR/hydration issues. Use when diagnosing or fixing Vue issues.
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, animations, and more) with direct links to specific error scenarios and fixes Covers Vue 3 specific gotchas including ref unwrapping, proxy identity hazards, v-model IME composition, template ref timing, and hydration mismatches Addresses advanced patterns like composable restrictions, provide/inject reactivity limitations, slot scoping, and KeepAlive memory leaks Includes SSR and TypeScript debugging guidance for universal code paths, type inference pitfalls, 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
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