Please Feat and Fix some issue

[jeneser]

1. Feat: can customize the bind location, including, but not limited to, the overall location of the body and custom commands that are used to mark the location.
2. Fix: pages are not high enough to cause accurate records or always scroll to the top position.
3. Feat: rolling timing control. There is a delay in data access on the page, and the page height due to incomplete content is insufficient. Will consider adding latency or asynchronous...

Good luck ~

[jeneser]

Fix #2: pages are not high enough to cause accurate records or always scroll to the top position.
PR: #4

[jeneser]

Feat: rolling timing control. PR: Add delay #9
It feels like handling ajax is a different (and useful) feature.