[bugfix] Swipe: add defensive code (#2253)

youzan · Dec 10, 2018 · eacabe8 · eacabe8
1 parent f1742ec
commit eacabe8
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/packages/swipe/index.vue b/packages/swipe/index.vue
@@ -220,9 +220,13 @@ export default create({
         return;
       }
 
-      swipes[0].offset = atLast && (delta < 0 || move > 0) ? trackSize : 0;
-      swipes[count - 1].offset =
-        atFirst && (delta > 0 || move < 0) ? -trackSize : 0;
+      if (swipes[0]) {
+        swipes[0].offset = atLast && (delta < 0 || move > 0) ? trackSize : 0;
+      }
+
+      if (swipes[count - 1]) {
+        swipes[count - 1].offset = atFirst && (delta > 0 || move < 0) ? -trackSize : 0;
+      }
 
       if (move && active + move >= -1 && active + move <= count) {
         this.active += move;