the scroll bar scrolls to the corresponding line header or end question after element ui table adds data rows
 scroll to the first line: 
 this.$refs.table.bodyWrapper.scrollTop = 0; 
 scroll to the last line: 
 this.$refs.table.bodyWrapper.scrollTop = this.$refs.table.bodyWrapper.scrollHeight; 
I saw the above solution on the Internet, but I tried it myself and found that it didn"t work. What"s the reason?
-- dividing line-
 follow-up progress: 
 I will change it to 
this.$nextTick(() => {
  let scrollHeight = this.$refs.table.bodyWrapper.scrollHeight
  this.$refs.table.bodyWrapper.scrollTop = scrollHeight
})
 can be set successfully, but always scroll to a place close to the bottom. 
 I checked that the bodyWrapper.scrollHeight is equal to 1256 and maxmax height is 659, so generally setting it to 1256-659 to 597 will ensure that the scroll bar scrolls to the bottom, but after I set it up, the printed bodyWrapper.scrollTop is 567, so it always scrolls a little closer to the bottom, why? 
