Vant has likes UI Framework Actionsheet pull-up menu Why can't the select event be used?

Why is the Actionsheet pull-up menu not available for the select event?
html
< van-actionsheet VMI model = "show": actions= "actions" @ select= "onSelect" / >
data
show:false,
actions: [

  {
    name: ""
  },
  {
    name: "1",
    subname: ""
  },
  {
    loading: true
  },
  {
    name: "",
    disabled: true
  }
]

methods
onSelect (item) {

this.show = false;
console.log(item)

},
sex(){
   this.show=true
},
Jul.27,2021

Hello, landlord! Your problem, how can others help you analyze it? there is no scene, no code. I have been using vant and have not found that select events cannot be used.

Menu