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TypeScript types for new JavaScript

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library 0.4.7 ·javascript
verified Jun 17, 2026

This package, `new-javascript`, provides TypeScript type definitions for cutting-edge and experimental Web APIs and JavaScript features that are not yet incorporated into TypeScript's standard `dom` library or `@types/web`. As of version 0.4.7, it covers a wide range of specifications from groups like WICG, including the File System Access API, View Transitions, and Compression Streams. The project's release cadence is driven by the evolution of these web standards and TypeScript's integration schedule. A key differentiator is its proactive approach to providing types for early-stage APIs, using automated WebIDL-to-TypeScript conversion with manual refinement. It also uniquely includes worker-exclusive interfaces by default and offers specific type declarations for various worklet types through distinct import paths, helping developers target specific environments.

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