removed common method loadImage into mixin

components/GalleryImageViewer.vue

@@ -31,11 +31,13 @@
 
 <script>
 import ThumbNav from '@/components/ThumbNav'
+import imageLoader from '~/mixins/imageLoader.js'
 
 export default {
   components: {
     ThumbNav
   },
+  mixins: [ imageLoader ],
   props: {
     isVisible: {
       type: Boolean,
@@ -105,18 +107,6 @@ export default {
         })
         // TODO catch errors
     },
-    loadImage(url) {
-      return new Promise( (resolve, reject) => {
-        const img = new Image()
-
-        img.addEventListener('load', e => resolve(img));
-        img.addEventListener('error', () => {
-          reject(new Error(`Failed to load image URL: ${url}`));
-        });
-
-        img.src = url;
-      })
-    }
   },
 }
 </script>

mixins/imageLoader.js

@@ -0,0 +1,16 @@
+export default {
+  methods: {
+    loadImage(url) {
+      return new Promise( (resolve, reject) => {
+        const img = new Image()
+
+        img.addEventListener('load', e => resolve(img));
+        img.addEventListener('error', () => {
+          reject(new Error(`Failed to load image URL: ${url}`));
+        });
+
+        img.src = url;
+      })
+    }
+  }
+}