fix window zoom

packages/overlayscrollbars/dist/overlayscrollbars.css

@@ -118,16 +118,17 @@
       min-height: 1px;
       min-width: 1px; }
 
-.os-scrollbar-transition {
-  transition: opacity 0.3s, visibility 0.3s, top 0.3s, right 0.3s, bottom 0.3s, left 0.3s; }
-
 .os-scrollbar {
+  transition: opacity 0.3s, visibility 0.3s, top 0.3s, right 0.3s, bottom 0.3s, left 0.3s;
   pointer-events: none;
   position: absolute;
   z-index: 0;
   opacity: 0;
   visibility: hidden; }
 
+.os-scrollbar-transitionless {
+  transition: none; }
+
 .os-scrollbar-track {
   pointer-events: auto;
   position: relative;

packages/overlayscrollbars/src/plugins/scrollbarsHidingPlugin/scrollbarsHidingPlugin.ts

@@ -242,8 +242,8 @@ export const scrollbarsHidingPlugin: Plugin<ScrollbarsHidingPluginInstance> = {
       return [arrangeViewport, undoViewportArrange];
     },
     _envWindowZoom: () => {
-      let size = windowSize();
-      let dpr = getWindowDPR();
+      let size = { w: 0, h: 0 };
+      let dpr = 0;
 
       return (envInstance, updateNativeScrollbarSizeCache, triggerEvent) => {
         const sizeNew = windowSize();
@@ -265,7 +265,7 @@ export const scrollbarsHidingPlugin: Plugin<ScrollbarsHidingPluginInstance> = {
         const dprNew = getWindowDPR();
         const deltaIsBigger = deltaAbsSize.w > 2 && deltaAbsSize.h > 2;
         const difference = !diffBiggerThanOne(deltaAbsRatio.w, deltaAbsRatio.h);
-        const dprChanged = dprNew !== dpr && dpr > 0;
+        const dprChanged = dprNew !== dpr && dprNew > 0;
         const isZoom = deltaIsBigger && difference && dprChanged;
 
         if (isZoom) {

packages/overlayscrollbars/types/overlayscrollbars.d.ts

@@ -1,3 +1,9 @@
+type CacheValues<T> = [
+    value: T,
+    changed: boolean,
+    previous?: T
+];
+type UpdateCache<Value> = (force?: boolean) => CacheValues<Value>;
 interface WH<T> {
     w: T;
     h: T;
@@ -156,6 +162,28 @@ interface ViewportOverflowState {
 }
 type GetViewportOverflowState = (showNativeOverlaidScrollbars: boolean, viewportStyleObj?: StyleObject) => ViewportOverflowState;
 type HideNativeScrollbars = (viewportOverflowState: ViewportOverflowState, directionIsRTL: boolean, viewportArrange: boolean, viewportStyleObj: StyleObject) => void;
+type EnvironmentEventMap = {
+    _: [
+    ];
+};
+interface InternalEnvironment {
+    readonly _nativeScrollbarsSize: XY;
+    readonly _nativeScrollbarsOverlaid: XY<boolean>;
+    readonly _nativeScrollbarsHiding: boolean;
+    readonly _rtlScrollBehavior: {
+        n: boolean;
+        i: boolean;
+    };
+    readonly _flexboxGlue: boolean;
+    readonly _cssCustomProperties: boolean;
+    readonly _defaultInitializationStrategy: InitializationStrategy;
+    readonly _defaultDefaultOptions: Options;
+    _addListener(listener: EventListener<EnvironmentEventMap, "_">): () => void;
+    _getInitializationStrategy(): InitializationStrategy;
+    _setInitializationStrategy(newInitializationStrategy: Partial<InitializationStrategy>): void;
+    _getDefaultOptions(): Options;
+    _setDefaultOptions(newDefaultOptions: PartialOptions<Options>): void;
+}
 type ArrangeViewport = (viewportOverflowState: ViewportOverflowState, viewportScrollSize: WH<number>, sizeFraction: WH<number>, directionIsRTL: boolean) => boolean;
 type UndoViewportArrangeResult = [
     redoViewportArrange: () => void,
@@ -163,11 +191,12 @@ type UndoViewportArrangeResult = [
 ];
 type UndoArrangeViewport = (showNativeOverlaidScrollbars: boolean, directionIsRTL: boolean, viewportOverflowState?: ViewportOverflowState) => UndoViewportArrangeResult;
 type ScrollbarsHidingPluginInstance = {
-    _createUniqueViewportArrangeElement(): HTMLStyleElement | false;
-    _overflowUpdateSegment(doViewportArrange: boolean, viewport: HTMLElement, viewportArrange: HTMLStyleElement | false | null | undefined, getState: () => StructureSetupState, getViewportOverflowState: GetViewportOverflowState, hideNativeScrollbars: HideNativeScrollbars): [
+    _createUniqueViewportArrangeElement(env: InternalEnvironment): HTMLStyleElement | false;
+    _overflowUpdateSegment(doViewportArrange: boolean, flexboxGlue: boolean, viewport: HTMLElement, viewportArrange: HTMLStyleElement | false | null | undefined, getState: () => StructureSetupState, getViewportOverflowState: GetViewportOverflowState, hideNativeScrollbars: HideNativeScrollbars): [
         ArrangeViewport,
         UndoArrangeViewport
     ];
+    _envWindowZoom(): (envInstance: InternalEnvironment, updateNativeScrollbarSizeCache: UpdateCache<XY<number>>, triggerEvent: () => void) => void;
 };
 declare const scrollbarsHidingPlugin: Plugin<ScrollbarsHidingPluginInstance>;
 type GeneralInitialEventListeners = InitialEventListeners;