confirm close with unsaved seconds

src/components/timer.vue

@@ -147,13 +147,19 @@
 
 				}
 
+			},
+			confirmClose(event){
+				if(this.totalSeconds > 0){
+					event.returnValue = "Clear or save your time"
+					return false
+				}
 			}
 		},
 		mounted() {
 			axios.get(import.meta.env.VITE_PRACTICE_TRACKER_API_URL+'categories').then((response)=>{
 				this.categories = response.data
 			})
-
+			window.onbeforeunload = this.confirmClose
 		}
 	}
 </script>