make onHighlightHoverStateChange callback optional

notelix · Sep 30, 2021 · d9a1002 · d9a1002
1 parent 41e9e4e
commit d9a1002
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Showing 2 changed files with 9 additions and 7 deletions.
diff --git a/src/lib/classes/EventHandler.ts b/src/lib/classes/EventHandler.ts
@@ -1,8 +1,8 @@
 import Context from "./Context";
 
 interface EventHandler {
-  onHighlightClick: (context: Context, element: HTMLElement) => void;
-  onHighlightHoverStateChange: (
+  onHighlightClick?: (context: Context, element: HTMLElement) => void;
+  onHighlightHoverStateChange?: (
     context: Context,
     element: HTMLElement,
     hovering: boolean

diff --git a/src/lib/classes/Marker.ts b/src/lib/classes/Marker.ts
@@ -421,11 +421,13 @@ class Marker {
 
   private highlightHovering(highlightId: string, hovering: boolean) {
     for (let element of Marker.resolveHighlightElements(highlightId)) {
-      this.eventHandler.onHighlightHoverStateChange(
-        this.buildContext(highlightId),
-        element as any,
-        hovering
-      );
+      if (this.eventHandler.onHighlightHoverStateChange) {
+        this.eventHandler.onHighlightHoverStateChange(
+          this.buildContext(highlightId),
+          element as any,
+          hovering
+        );
+      }
     }
   }