修改tooltip组件span的宽度

src/components/line2Hidden/index.vue

 <template>
   <el-tooltip :placement="placement" trigger="click">
     <template slot="content">
-      {{ text ? text : "" }}
+      <span class="tooltip-span">{{ text ? text : "" }}</span>
     </template>
     <div class="line2Hidden">
       {{ text ? text : "" }}
@@ -33,4 +33,9 @@ export default {
   -webkit-line-clamp: 2;
   overflow: hidden;
 }
+.tooltip-span{
+  display: inline-block;
+  width: 100%;
+  max-width: 300px;
+}
 </style>