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src/vs/base/browser/ui/scrollbar/scrollableElement.ts

@@ -410,11 +410,13 @@ export abstract class AbstractScrollableElement extends Widget {
 			let desiredScrollPosition: INewScrollPosition = {};
 			if (deltaY) {
 				const deltaScrollTop = SCROLL_WHEEL_SENSITIVITY * deltaY;
+				// Here we convert values such as -0.3 to -1 or 0.3 to 1, otherwise low speed scrolling will never scroll
 				const desiredScrollTop = futureScrollPosition.scrollTop - (deltaScrollTop < 0 ? Math.floor(deltaScrollTop) : Math.ceil(deltaScrollTop));
 				this._verticalScrollbar.writeScrollPosition(desiredScrollPosition, desiredScrollTop);
 			}
 			if (deltaX) {
 				const deltaScrollLeft = SCROLL_WHEEL_SENSITIVITY * deltaX;
+				// Here we convert values such as -0.3 to -1 or 0.3 to 1, otherwise low speed scrolling will never scroll
 				const desiredScrollLeft = futureScrollPosition.scrollLeft - (deltaScrollLeft < 0 ? Math.floor(deltaScrollLeft) : Math.ceil(deltaScrollLeft));
 				this._horizontalScrollbar.writeScrollPosition(desiredScrollPosition, desiredScrollLeft);
 			}