HarmonyOS NEXT创建对象提示Object literal must correspond to some explicitly declared class or interface

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HarmonyOS NEXT创建对象提示Object literal must correspond to some explicitly declared class or interface

let userinfo={
  username:"张三",
  age:20,
  sex:"男"
}

解决办法：

interface UserInfoInterface{
  username:string,
  age:number,
  sex:string
}
 
let userinfo:UserInfoInterface={
  username:"张三",
  age:20,
  sex:"男"
}