清除线

src/components/home.vue

@@ -210,6 +210,10 @@ export default ({
             console.log("从UE返回过来的值", data)
 
             popoverRef.value.style.display = "none"
+            if (lineContainer.value) {
+                    lineContainer.value.remove()
+                    lineContainer.value = null
+                }
 
             //如果退出教室
             if(data=='quit_class'){