WeChat applet returns to the previous page

wx.navigateBack({ delta: 1 //return to previous page})

html：

<view class="refusea_btn">
        <van-button type="primary" size="large" bind:tap="submit">保存</van-button>
</view>

js:

//提交
  submit(){
    
    
    let data = this.data;
    let params = data.AddressVo;
    if(params.name == ""){
    
    
      wx.showToast({
    
    
        icon: "none",
        title:"请输入发货人姓名"
      })
      return
    }
    if(params.mobile == ""){
    
    
      wx.showToast({
    
    
        icon: "none",
        title:"请填写手机号"
      })
      return
    }
    if(params.address == ""){
    
    
      wx.showToast({
    
    
        icon: "none",
        title:"请选择收货地址"
      })
      return
    }
    if(params.addressDetail == ""){
    
    
      wx.showToast({
    
    
        icon: "none",
        title:"请填写详细收货地址"
      })
      return
    }
    POST('/store/saveShipAddress', params).then(res => {
    
    
     if(res.code === 200){
    
    
       wx.showToast({
    
    
         icon:'success',
         title:'保存成功！'
       })
       setTimeout(item => {
    
    
         wx.navigateBack({
    
    
           delta: 1 //返回上一级页面
         })
       },2000)
     }else{
    
    
       wx.showToast({
    
    
         icon:'none',
         title:'保存失败'
       })
     }
    })
  },