How to achieve smooth scrolling?

Good evening. Could you please help to achieve continuous change indentation by dragging the slider on the scrollbar thank you all in Advance!
June 27th 19 at 15:19
2 answers
June 27th 19 at 15:21
Use input instead of change.
Thank you very much! - Eldred_Ebe commented on June 27th 19 at 15:24
June 27th 19 at 15:23
Frankly, your code is worthless. Want to change something, will have to go into the code and re-sort out this mess.
Vzhuh and get more clean and clear:
You can change CSS properties, but to climb in JS is not necessary.

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