清空对象字段

使用for..in

let coyForm={
         coyName: "fsdfds",
        coyPrice: "sdfsdfsd",
        coyCount: "fsdfsd",
}
   clearForm(){
      for(let item in coyForm){
          coyForm[item]=''
      } 
    console.log(coyForm)

输出

coyForm={
         coyName: "",
        coyPrice: "",
        coyCount: "",
}