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;