fix: check if hooks are provided (#1)

yyx990803 · Feb 12, 2018 · 55276a5 · 55276a5
1 parent e12aa44
commit 55276a5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/index.js b/src/index.js
@@ -17,7 +17,7 @@ const isLocalhost = Boolean(
 
 export function register (swUrl, hooks) {
   const emit = (hook, ...args) => {
-    if (hooks[hook]) {
+    if (hooks && hooks[hook]) {
       hooks[hook](...args)
     }
   }