v2.15.12
Menu: fix arrow navigation of SubMenu (#10304)
PopupManager: fix z-index cannot be rewritten at first using (#15738)
Loading: fix loading not disappear in some condition (#9313)
Accessibility for message & message-box & tabs (#7424)
Cascader: refactor and add multiple mode. (#15611)
clickoutside: fix memory leak
Utils: update date-util.js (#22099)
DatePicker: support literal (#15525)
Utils: fix isScroll (#21098)
Table/MessageBox/Tree: remove object-assign
Popper: fix memory leak on route change (#9757)
Table: fix resizeObserver loop limit exceeded (#21255)
Utils: scroll-into-view should consider target element's offset parents (#11058)
ScrollBar: cache bar width calculation
Input / Select: fix Korean IME composition bug (#10648)
fix: update isFunction (#20912)
Image: Fix image ssr (#16737) (#16747)
Tooltip: displays when initial value is true (#14826)