Tech Apr 22, 2026 12 min Rescuing exifr's broken GPS parsing on iPhone 17 HEIC with a browser-only fallback iPhone 17's HEIC adds new brand identifiers to the ftyp box, pushing it past exifr's hard-coded 50-byte guard. Here's a dynamic-import fallback to ExifReader, plus Null Island filtering and iloc pre-inspection to harden browser-only photo tools. iOS ブラウザ JavaScript Web セキュリティ
