handle central slot existence better

richard-webb-dev · Jan 12, 2020 · 2015e77 · 2015e77
1 parent 97d548f
commit 2015e77
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/components/nav-wheel.vue b/src/components/nav-wheel.vue
@@ -129,7 +129,13 @@ export default {
   },
   mounted() {
     // Reposition the slot to be inline with the radial wheel.
-    this.centerSlotBox = this.$slots.center[0].elm.getBBox();
+    if (this.$slots.center) {
+      if (this.$slots.center.length > 1)
+        throw new Error(
+          "Expecting only one element, please wrap in a <g> tag."
+        );
+      this.centerSlotBox = this.$slots.center[0].elm.getBBox();
+    }
   },
   watch: {
     $route() {