checklist.day

File System Access Ponyfill

JSON →
library 1.0.4 ·javascript
✓ verified Jun 7, 2026
storage

A TypeScript ponyfill implementing the WICG File System Access specification with pluggable storage adapters (IndexedDB, Cache API, Node fs, Deno, in-memory). Version 1.0.4, active development. Falls back to native browser API when available, with strict error handling and modern ESM support. Includes ponyfills for picker methods and writable file streams. Fully typed, supports tree-shaking.

Resources

githubgithub.com/use-strict/file-system-access ↗
packagefile-system-access ↗
homepagegithub.com/use-strict/file-system-access#readme ↗

API endpoints

full doc /v1/registry/file-system-access
install /v1/registry/file-system-access/install