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