vue3.0 typescript 调用watch,state,prop等

 //监听值的变化
 @Watch("type")
        setType(newVal: number,oldVal:number) {
              console.log(newVal);
              console.log(oldVal);
        }
 //对应modules里的chat
  @State("Chat") chatList! : chatStatusInterface; 
 //对应总名称
   @State("footNav") footNav!: footNavInterface;      
  //父往子传值
  @Prop(Number) type! : number;