前端头像加载失败则使用默认头像

frontend/src/components/ChatRenderer/ImgShadow.vue

@@ -1,16 +1,35 @@
 <template>
   <yt-img-shadow class="no-transition" :height="height" :width="width" style="background-color: transparent;" loaded>
-    <img id="img" class="style-scope yt-img-shadow" alt="" :height="height" :width="width" :src="imgUrl">
+    <img id="img" class="style-scope yt-img-shadow" alt="" :height="height" :width="width" :src="showImgUrl" @error="onLoadError">
   </yt-img-shadow>
 </template>
 
 <script>
+import {DEFAULT_AVATAR_URL} from '@/api/chat/avatar'
+
 export default {
   name: 'ImgShadow',
   props: {
     imgUrl: String,
     height: String,
     width: String
+  },
+  data() {
+    return {
+      showImgUrl: this.imgUrl
+    }
+  },
+  watch: {
+    imgUrl(val) {
+      this.showImgUrl = val
+    }
+  },
+  methods: {
+    onLoadError() {
+      if (this.showImgUrl !== DEFAULT_AVATAR_URL) {
+        this.showImgUrl = DEFAULT_AVATAR_URL
+      }
+    }
   }
 }
 </script>