:recycle: swapping undef target for el

vue-theme/src/pages/list.vue

@@ -154,7 +154,7 @@ export default {
                 entries.forEach(entry => {
                     if (!entry.isIntersecting) return
                     console.log("intersected:", entry)
-                    this.observer.unobserve(target)
+                    this.observer.unobserve(footerEl)
                     setTimeout(() => {
                         this.loadMorePosts()
                     }, 1000)