Release notes

Changelog

Enhancement	Improve performance of scrolling and hit tests
Enhancement	Improve performance of reading font files
Enhancement	Add virtual list scrolling sample
Enhancement	Add support gamepad with Input Manager in Unity3D
Enhancement	Implement gamepad editor tool to insert gamepad controls in Unity3D
Enhancement	Add units support for flex basis
Enhancement	Add support for preloaded images in Unity3D with DirectX 12
Enhancement	Support building the PlayerOverrides project in Unreal Engine 4
Fix	Fix crash in video when there are multiple layout threads and views are not updated every frame
Fix	Fix scrolling in elements with dynamically changed content and size
Fix	Fix crash when using data-bind-for for a string value
Fix	Fix crash when converting a non-boolean value to boolean for data-binding
Fix	Fix undefined behavior when binding empty arrays and vectors
Fix	Fix clearing of canvas textures in certain cases
Fix	Add missing temp allocator for IME related methods of `cohtml::View`
Fix	Fix scrolling and panning when it is performed very slowly
Fix	Fix triggering events with null objects from C# to JavaScript in Unity3D
Fix	Fix changing styles in the inspector in Chrome 80 and later
Fix	Fix submission warnings for debug symbols on Stadia
API	C++ standard library to libc++ on Stadia
API	C++ standard library to libc++ on Linux
API	Add developer option for controlling whether to snap the display boxes before transforming. Warning: Enabling this option results in more repainting.

Fix	Reverted scrolling optimization due to causing artifacts and input issues.

Fix	Reintroduced the scrolling optimization with fixes for the artifacts and input issues.

Enhancement	Added sample with polyfill for , lists and
Enhancement	Added sample for using subtitles for videos
Enhancement	Moved text case transformations to the DOM thread
Fix	Fix turned off the scrolling optimization, because it can break the input in certain cases
Fix	Fix layout overwriting the scroll position set on the DOM thread
Fix	Fix crash when element change parents with overflow: hidden
Fix	Fix some animations not running to complete 100%
Fix	Fix crashes due to missing temporary allocator in TriggerEvent when calling it from fibers or different threads
Fix	Fix scrollWidth for text with overflow
Fix	Fix coordinated for scroll event in Unity3D packaged games
Fix	Fix Unity3D reloading when TextTransformationManager is used
Fix	Fix scrolling coordinates with the new Unity3D input system

Fix	Reintroduced the scrolling optimization with fixes for the artifacts and input issues.