:recycle: tweaking refactor of click setting

vue-theme/src/pages/single.vue

             this.loading = false
         },
         _setClick(el, cb) {
-            el.dataset.gallery = index
             if (el.addEventListener) {
                 el.addEventListener('click', cb, false)
             } else {
             if (!this.$el) return
             const section = this.$el.children[0].querySelector('section')
             await nextTick()
-            const galleries = section.querySelectorAll('.wp-block-gallery')
-            galleries.forEach((gallery, galleryIndex) => {
-                gallery.querySelectorAll('img').forEach(image =>
-                    this._setClick(image, galleryIndex, e => {
+            const galleryBlocks = section.querySelectorAll('.wp-block-gallery')
+            galleryBlocks.forEach((block, blockIndex) => {
+                block.querySelectorAll('img').forEach(image => {
+                    image.dataset.gallery = blockIndex
+                    this._setClick(image, e => {
                         this.activeGalleryIndex = e.target.dataset.gallery
-
                         const activeGallery =
                             post.galleries[this.activeGalleryIndex]
 
                             `opening gallery: ${this.activeGalleryIndex}.${this.activeImageIndex}`,
                         )
                         console.log(e.target.dataset)
-                    }),
-                )
+                    })
+                })
             })
         },
     },