Umajin 4.0.3 Improvements: Mac: improved visual quality for scaled-down images (mip-mapping) and angled lines/curves (MSAA) JS file handling: New APIs for copyFile, deleteFile, deleteDirectory, bool return codes for IO functions, and better error messages New renderkitModelUpdateVisibleTween for performance. LibJS: FeedItemView addCustomFeed, and setting custom feed parameters System requirements: iOS: Umajin now