Bug Fix: off unexpectedly removes unlocked handlers.

dist/js/splide.cjs.js

@@ -1,6 +1,6 @@
 /*!
  * Splide.js
- * Version  : 3.0.8
+ * Version  : 3.0.9
  * License  : MIT
  * Copyright: 2021 Naotoshi Fujita
  */
@@ -332,7 +332,7 @@ function EventBus() {
     forEachEvent(events, (event, namespace) => {
       const eventHandlers = handlers[event];
       handlers[event] = eventHandlers && eventHandlers.filter((handler) => {
-        return handler._key ? handler._key !== key : handler._namespace !== namespace;
+        return handler._key ? handler._key !== key : key || handler._namespace !== namespace;
       });
     });
   }

dist/js/splide.esm.js

@@ -1,6 +1,6 @@
 /*!
  * Splide.js
- * Version  : 3.0.8
+ * Version  : 3.0.9
  * License  : MIT
  * Copyright: 2021 Naotoshi Fujita
  */
@@ -328,7 +328,7 @@ function EventBus() {
     forEachEvent(events, (event, namespace) => {
       const eventHandlers = handlers[event];
       handlers[event] = eventHandlers && eventHandlers.filter((handler) => {
-        return handler._key ? handler._key !== key : handler._namespace !== namespace;
+        return handler._key ? handler._key !== key : key || handler._namespace !== namespace;
       });
     });
   }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@splidejs/splide",
-  "version": "3.0.8",
+  "version": "3.0.9",
   "description": "Splide is a lightweight, flexible and accessible slider/carousel. No dependencies, no Lighthouse errors.",
   "author": "Naotoshi Fujita",
   "license": "MIT",

src/js/constructors/EventBus/EventBus.ts

@@ -90,7 +90,7 @@ export function EventBus(): EventBusObject {
       const eventHandlers = handlers[ event ];
 
       handlers[ event ] = eventHandlers && eventHandlers.filter( handler => {
-        return handler._key ? handler._key !== key : handler._namespace !== namespace;
+        return handler._key ? handler._key !== key : key || handler._namespace !== namespace;
       } );
     } );
   }

src/js/constructors/EventBus/test/key.test.ts

@@ -63,4 +63,24 @@ describe( 'EventBus', () => {
     expect( onMounted ).not.toHaveBeenCalled();
     expect( onMoved ).not.toHaveBeenCalled();
   } );
+
+  test( 'should not remove a handler if a key does not match.', () => {
+    const event     = EventBus();
+    const callback1 = jest.fn();
+    const callback2 = jest.fn();
+    const callback3 = jest.fn();
+    const key       = {};
+
+    event.on( 'mounted', callback1 );
+    event.on( 'mounted', callback2, key );
+    event.on( 'mounted', callback3, key );
+
+    event.off( 'mounted', key );
+
+    event.emit( 'mounted' );
+
+    expect( callback1 ).toHaveBeenCalledTimes( 1 );
+    expect( callback2 ).not.toHaveBeenCalled()
+    expect( callback3 ).not.toHaveBeenCalled()
+  } );
 } );