fix: inline dragOffset and offsetTop in initial

Author: aminya

lib/minimap-element.js

@@ -1178,12 +1178,10 @@ class MinimapElement {
     if (!this.minimap) { return }
     if (!isLeftMouse && !isMiddleMouse) { return }
 
-    const { top } = this.visibleArea.getBoundingClientRect()
-    const { top: offsetTop } = this.getBoundingClientRect()
-
-    const dragOffset = y - top
-
-    const initial = { dragOffset, offsetTop }
+    const initial = {
+      dragOffset: y - this.visibleArea.getBoundingClientRect().top,
+      offsetTop: this.getBoundingClientRect().top
+    }
 
     const mousemoveHandler = (e) => this.drag(extractMouseEventData(e), initial)
     const mouseupHandler = (e) => this.endDrag()