the current solution is very common, which is to get the next page of data, splice it to the original data, and then set it into data
.let origin_data = this.data.list
let new_data = origin_data.concat(res.data)
this.setData({
list: new_data
})
this method is fine for a small amount of data in data, but if the item data in data is complicated, it is slow to render. I saw a method that only set the newly fetched array on the Internet, but I don"t know how to operate it through index,.