v0.2.0

What's New

• Type narrowing in templates: Full support for discriminated unions, {#if} / {:else if} chains, and {#each} blocks with proper type narrowing propagation
• SvelteKit integration: Automatic PageData type annotations for route files and generated types discovery
• Snippet improvements: Proper narrowing context from @render call sites, {@const} bindings inside snippet bodies, and optional parameter handling
• Component prop validation: Check required props, type mismatches, and bind: prop types
• CSS vendor prefix diagnostics: Warn about compatibility issues with CSS vendor prefixes
• TypeScript file diagnostics: Report errors from all .ts files in workspace, not just .svelte files
• state_referenced_locally warning: Detect $state() variables referenced only in the defining scope
• slot_element_deprecated warning: Warn about deprecated <slot> elements in Svelte 5 components

Bug Fixes

• Fix false positives for destructured @const bindings and local types
• Fix state_referenced_locally false positives for $bindable props, object property keys, and $props() rest patterns
• Fix import source mapping for files with leading comments or scattered imports
• Fix typeof type hoisting and layout children prop handling
• Fix style: directive parsing and skip custom action events
• Fix tsconfig filtering with relative workspace paths
• Fix snippet narrowing for {:else if} branches and enclosing if conditions
• Emit const for {@const} bindings to enable closure narrowing
• Preserve arrow function props for type checking
• Fix snippets in logic blocks not being treated as component props
• Respect // svelte-ignore comments for state_referenced_locally
• Fix callback parameter type inference
• Transform Svelte 4 store assignment syntax to set() calls
• Fix generic component props referencing out-of-scope type params
• Fix {#each} binding scoping and destructuring with keyed expressions
• Fix class directive parsing for Tailwind class names with dots/brackets
• Handle pipe modifiers on transition directives
• Fix brace matching in attribute expressions with comments
• Import Snippet type globally for Svelte 5 compatibility
• Fix discriminated union narrowing in template if/else-if chains
• Detect unsupported TypeScript enum and namespace features

Installation

brew install ampcode/tap/zvelte-check

v0.1.4

What's New

• Improved TypeScript compatibility: Use Svelte 5 Component interface for ComponentProps and add index signature to $$Exports for mount() compatibility
• Integration test runner: New test infrastructure comparing zvelte-check output against svelte-check for parity verification

Bug Fixes

• Fix false positives for variables used in templates
• Fix expression attribute value extraction and handle shadowed builtins
• Emit void for keyed {#each} key expressions
• Add skipPropsTypeAnnotation for complex multi-line prop types
• Mark store variables as used when $prefix form appears in template
• Filter unused import declaration errors for Svelte files
• Suppress 'Right operand of ?? is unreachable' for Svelte files
• Emit void statements for $bindable() props
• Filter type-only import 'declared but never used' errors
• Filter 'unknown' type cascade errors in Svelte files
• Fix brace counting in template scanner to skip string literals
• Add fallback for unmapped TypeScript regions in source maps
• Emit null-safe fallback for {#each} iterables
• Filter test file false positives from component type inference
• Filter false positive errors from template narrowing
• Skip reserved keywords in template refs
• Report errors from .ts files alongside .svelte files
• Emit template variable references to support noUnusedLocals
• Inherit strict type checks from project tsconfig
• Suppress type assertion conversion false positives
• Skip 'unknown' type property errors from tsgo rootDirs bug
• Skip generic type params in $bindable<T>() calls
• Include SvelteKit generated types for route resolution
• Use Svelte 5 Component type for .svelte and ~icons/* modules
• Skip snippet declarations that shadow script imports
• Generate var declarations for store subscriptions
• Fix multi-line $props() destructuring in Svelte 5 components
• Fix store assignments and snippet param shadowing errors
• Fix TypeScript error detection in Svelte files

Installation

brew install ampcode/tap/zvelte-check

v0.1.3

What's New

• Fixed false positive: separator role no longer incorrectly requires aria-valuenow

Bug Fixes

• a11y-role-has-required-aria-props: The separator role has no required ARIA properties per ARIA spec. The aria-valuenow attribute is only optionally supported for focusable separators. This aligns with svelte-check behavior.

Installation

brew install ampcode/tap/zvelte-check

v0.1.2

What's New

• a11y: Merge consecutive svelte-ignore comments for cleaner diagnostics
• perf: Add early-exit checks and pre-size buffers in transformer
• tsgo: Cache line tables in diagnostic mapping for faster lookups
• tsgo: Resolve native binary directly, skip Node.js wrapper

Bug Fixes

None

Breaking Changes

None

v0.1.1

What's New

• Generated stubs now written to .zvelte-check/ directory instead of alongside source files, avoiding conflicts with parallel linters like Biome

Upgrade Notes

Add .zvelte-check/ to your project's .gitignore:

echo '.zvelte-check/' >> .gitignore

Installation

brew install ampcode/tap/zvelte-check

v0.1.0

Release v0.1.0