vue 中使用 watch 出现了如下的报错

 报错: method "watch" has type "object" in the component definition. did you reference the function method "watch" has type "object" in the component definition. did you reference the function correctly?

　　原因: watch 是一个对象,应该以键值对的形式来使用,但是我 将 watch 放到了 methods: {} 中,导致了这个问题;

　　解决办法:  将watch 对象 拿出来,与 methods 平级;

 

附上当时的代码:

watch: {

        "$route.path":function(newval){

          if(newval === '/home'){

            this.flag = false

          }else{

            this.flag = true

          }

        }

      }

  }