follows/followers pagination ready for review

src/components/friends_list/friends_list.js

@@ -0,0 +1,61 @@
+import UserCard from '../user_card/user_card.vue'
+
+const FriendsList = {
+  data () {
+    return {
+      loading: false,
+      bottomedOut: false,
+      error: false
+    }
+  },
+  props: ['userId'],
+  created () {
+    window.addEventListener('scroll', this.scrollLoad)
+    if (this.user.followers.length === 0) {
+      this.fetchFriends()
+    }
+  },
+  destroyed () {
+    window.removeEventListener('scroll', this.scrollLoad)
+    this.$store.dispatch('clearFriendsAndFollowers', this.userId)
+  },
+  computed: {
+    user () {
+      return this.$store.getters.userById(this.userId)
+    },
+    friends () {
+      return this.user.friends
+    }
+  },
+  methods: {
+    fetchFriends () {
+      if (!this.loading) {
+        this.loading = true
+        this.$store.dispatch('addFriends', this.userId).then(friends => {
+          this.error = false
+          this.loading = false
+          this.bottomedOut = friends.length === 0
+        }).catch(() => {
+          this.error = true
+          this.loading = false
+        })
+      }
+    },
+    scrollLoad (e) {
+      const bodyBRect = document.body.getBoundingClientRect()
+      const height = Math.max(bodyBRect.height, -(bodyBRect.y))
+      if (this.loading === false &&
+        this.bottomedOut === false &&
+        this.$el.offsetHeight > 0 &&
+        (window.innerHeight + window.pageYOffset) >= (height - 750)
+      ) {
+        this.fetchFriends()
+      }
+    }
+  },
+  components: {
+    UserCard
+  }
+}
+
+export default FriendsList