fix: $off should ignore undefined handler argument

fix vuejs#6591
ztlevi · Feb 14, 2018 · 85fa28d · 85fa28d
1 parent b29a672
commit 85fa28d
Showing 1 changed file with 10 additions and 8 deletions.
diff --git a/src/core/instance/events.js b/src/core/instance/events.js
@@ -95,14 +95,16 @@ export function eventsMixin (Vue: Class<Component>) {
       vm._events[event] = null
       return vm
     }
-    // specific handler
-    let cb
-    let i = cbs.length
-    while (i--) {
-      cb = cbs[i]
-      if (cb === fn || cb.fn === fn) {
-        cbs.splice(i, 1)
-        break
+    if (fn) {
+      // specific handler
+      let cb
+      let i = cbs.length
+      while (i--) {
+        cb = cbs[i]
+        if (cb === fn || cb.fn === fn) {
+          cbs.splice(i, 1)
+          break
+        }
       }
     }
     return vm