Merge pull request #683 from lgeiger/passive-event-handlers

Make event listeners passive

lib/minimap-element.js

@@ -363,7 +363,7 @@ class MinimapElement {
       elementResizeDetector.listenTo(this, measureDimensions)
       this.subscriptions.add(new Disposable(() => { elementResizeDetector.removeListener(this, measureDimensions) }))
 
-      window.addEventListener('resize', measureDimensions)
+      window.addEventListener('resize', measureDimensions, { passive: true })
       this.subscriptions.add(new Disposable(() => { window.removeEventListener('resize', measureDimensions) }))
     }
 
@@ -1229,13 +1229,13 @@ class MinimapElement {
     let touchmoveHandler = (e) => this.drag(this.extractTouchEventData(e), initial)
     let touchendHandler = (e) => this.endDrag()
 
-    document.body.addEventListener('mousemove', mousemoveHandler)
-    document.body.addEventListener('mouseup', mouseupHandler)
-    document.body.addEventListener('mouseleave', mouseupHandler)
+    document.body.addEventListener('mousemove', mousemoveHandler, { passive: true })
+    document.body.addEventListener('mouseup', mouseupHandler, { passive: true })
+    document.body.addEventListener('mouseleave', mouseupHandler, { passive: true })
 
-    document.body.addEventListener('touchmove', touchmoveHandler)
-    document.body.addEventListener('touchend', touchendHandler)
-    document.body.addEventListener('touchcancel', touchendHandler)
+    document.body.addEventListener('touchmove', touchmoveHandler, { passive: true })
+    document.body.addEventListener('touchend', touchendHandler, { passive: true })
+    document.body.addEventListener('touchcancel', touchendHandler, { passive: true })
 
     this.dragSubscription = new Disposable(function () {
       document.body.removeEventListener('mousemove', mousemoveHandler)