This package has limited breaking-change data (2 entries). Check back later or see the package health page for the full signal.

typescript breaking changes

npm

2 curated breaking changes across major versions of typescript. Use this as a migration checklist before bumping dependencies.

View package health \u2192Known bugs \u2192
2
changes
Breaking changes by transition
  • 5 \u2192 5.5behavior

    Isolated declarations mode added; stricter type narrowing for some patterns.

    Migration

    If you rely on implicit declaration emit across modules, enable `isolatedDeclarations: true` and add explicit return types.

  • 4.9 \u2192 5.0runtime

    Node.js 12.20+ required; lib.d.ts updated; stage-3 decorators replace experimental ones.

    Migration

    Experimental decorators still available via `experimentalDecorators: true`. New stage-3 decorators have different semantics.

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