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Browser Support

Minimum supported versions: Chrome 90+, Firefox 90+, Safari 14+, Edge 90+

Full Compatibility Matrix

Module Chrome Firefox Safari Edge Fallback
storage/session 90+ 90+ 14+ 90+ Memory
cookie 90+ 90+ 14+ 90+ -
clipboard 90+ 90+ 14+ 90+ execCommand
download 90+ 90+ 14+ 90+ -
events 90+ 90+ 14+ 90+ -
keyboard 90+ 90+ 14+ 90+ -
form 90+ 90+ 14+ 90+ -
focus 90+ 90+ 14+ 90+ -
scroll 90+ 90+ 14+ 90+ -
url 90+ 90+ 14+ 90+ -
html 90+ 90+ 14+ 90+ -
logging 90+ 90+ 14+ 90+ -
device 90+ 90+ 14+ 90+ -
features 90+ 90+ 14+ 90+ -
media 90+ 90+ 14+ 90+ -
fullscreen 90+ 90+ 14+ 90+ -
notification 90+ 90+ 14+ 90+ -
network 90+ 90+ 14+ 90+ -
observe 90+ 90+ 14+ 90+ -
idle 90+ 90+ - 90+ setTimeout
indexeddb 90+ 90+ 14+ 90+ -
websocket 90+ 90+ 14+ 90+ -
csp 90+ 90+ 14+ 90+ -
sanitize 90+ 90+ 14+ 90+ -

API-Specific Support

API Chrome Firefox Safari Edge
IntersectionObserver 51+ 55+ 12.1+ 15+
ResizeObserver 64+ 69+ 13.1+ 79+
MutationObserver 26+ 14+ 7+ 12+
requestIdleCallback 47+ 55+ - 79+
Clipboard API 66+ 63+ 13.1+ 79+
Web Notifications 22+ 22+ 7+ 14+
IndexedDB 24+ 16+ 10+ 12+
WebSocket 16+ 11+ 6+ 12+
crypto.subtle 37+ 34+ 11+ 12+

Fallbacks are provided for unsupported features where possible.