Show placeholder image if avatar image url is broken

src/components/user_avatar/user_avatar.js

@@ -0,0 +1,28 @@
+import StillImage from '../still-image/still-image.vue'
+import nsfwImage from '../../assets/nsfw.png'
+
+const UserAvatar = {
+  props: [
+    'src'
+  ],
+  data () {
+    return {
+      showPlaceholder: false
+    }
+  },
+  components: {
+    StillImage
+  },
+  computed: {
+    imgSrc () {
+      return this.showPlaceholder ? nsfwImage : this.src
+    }
+  },
+  methods: {
+    imageLoadError () {
+      this.showPlaceholder = true
+    }
+  }
+}
+
+export default UserAvatar