Prefer arrow functions and callbacks (#1210)

src/scene/scrollbars.ts

@@ -9,7 +9,7 @@ export const SCROLLBAR_MARGIN = 4;
 export const SCROLLBAR_WIDTH = 6;
 export const SCROLLBAR_COLOR = "rgba(0,0,0,0.3)";
 
-export function getScrollBars(
+export const getScrollBars = (
   elements: readonly ExcalidrawElement[],
   viewportWidth: number,
   viewportHeight: number,
@@ -22,7 +22,7 @@ export function getScrollBars(
     scrollY: FlooredNumber;
     zoom: number;
   },
-): ScrollBars {
+): ScrollBars => {
   // This is the bounding box of all the elements
   const [
     elementsMinX,
@@ -100,9 +100,13 @@ export function getScrollBars(
               Math.max(SCROLLBAR_MARGIN * 2, safeArea.top + safeArea.bottom),
           },
   };
-}
+};
 
-export function isOverScrollBars(scrollBars: ScrollBars, x: number, y: number) {
+export const isOverScrollBars = (
+  scrollBars: ScrollBars,
+  x: number,
+  y: number,
+) => {
   const [isOverHorizontalScrollBar, isOverVerticalScrollBar] = [
     scrollBars.horizontal,
     scrollBars.vertical,
@@ -120,4 +124,4 @@ export function isOverScrollBars(scrollBars: ScrollBars, x: number, y: number) {
     isOverHorizontalScrollBar,
     isOverVerticalScrollBar,
   };
-}
+};