Window: scrollByLines() method
Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.
The Window.scrollByLines() method scrolls the document by
the specified number of lines.
Syntax
Parameters
lines-
The number of lines to scroll the document by. It may be a positive or negative integer.
Return value
None (undefined).
Examples
Specifications
This is not part of any specification.