closes #11

index.js

@@ -2,9 +2,9 @@
   typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('riot'), require('bianco.query')) :
   typeof define === 'function' && define.amd ? define(['exports', 'riot', 'bianco.query'], factory) :
   (global = global || self, factory(global.riotHotReload = {}, global.riot, global.$));
-}(this, function (exports, riot, $) { 'use strict';
+}(this, (function (exports, riot, $) { 'use strict';
 
-  $ = $ && $.hasOwnProperty('default') ? $['default'] : $;
+  $ = $ && Object.prototype.hasOwnProperty.call($, 'default') ? $['default'] : $;
 
   const { cssManager } = riot.__;
   const { DOM_COMPONENT_INSTANCE_PROPERTY } = riot.__.globals;
@@ -20,6 +20,9 @@
     return $(`${name}, [is=${name}]`).map(el => {
       const oldTag = el[DOM_COMPONENT_INSTANCE_PROPERTY];
 
+      // early return in case there is no riot instance found
+      if (!oldTag) return
+
       // remove the tag template from the DOM
       oldTag.unmount(true);
       // delete the old css from the css manager
@@ -38,4 +41,4 @@
 
   Object.defineProperty(exports, '__esModule', { value: true });
 
-}));
+})));