seniorTypeScript
Discuss 'Inlay Hints' and 'Type Acquisition' in the Language Service.
Updated May 4, 2026
Short answer
Inlay hints provide visual inline metadata, while Type Acquisition fetches types for JS libraries automatically[cite: 1].
Deep explanation
The TS Language Service powers the IDE experience. Inlay hints display inferred types and parameter names overlaying the code. Automatic Type Acquisition (ATA) is a background process that fetches @types/ packages from npm to provide autocompletion for libraries that don't include types[cite: 1].
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