修改

src/views/selfShop/message/parts/right-1.vue

@@ -390,7 +390,7 @@
 </template>
 
 <script>
-import { number } from 'echarts';
+import * as util from '@/util/computed';
 import { mapState, createNamespacedHelpers } from 'vuex';
 export default {
   name: 'right-1',
@@ -423,7 +423,7 @@ export default {
           // this.$refs.scrollContent.scrollTop = 1000000000;
           var msg = document.getElementById('scrolldIV');
           // let distanceFromBottom = msg.scrollHeight - msg.scrollTop - msg.clientHeight;
-          if (this.delTop > 0) msg.scrollTop = msg.scrollHeight - this.delTop;
+          if (this.delTop > 0) msg.scrollTop = util.minus(msg.scrollHeight, this.delTop);
           else msg.scrollTop = msg.scrollHeight; // 滚动高度
           this.$set(this, `oldTop`, msg.scrollTop);
         });