The Window.scrollBy() method scrolls the document in the window by the given amount.

• x-coord is the horizontal pixel value that you want to scroll by.
• y-coord is the vertical pixel value that you want to scroll by.

- or -

options

A dictionary containing the following parameters:

top

Specifies the number of pixels along the Y axis to scroll the window or element.

left

Specifies the number of pixels along the X axis to scroll the window or element.

behavior

Specifies whether the scrolling should animate smoothly (smooth), happen instantly in a single jump (instant), or let the browser choose (auto, default).

None (undefined).

To scroll down one page:

window.scrollBy(0, window.innerHeight);

To scroll up:

window.scrollBy(0, -window.innerHeight);

Using options:

window.scrollBy({
  top: 100,
  left: 100,
  behavior: "smooth",
});

window.scrollBy() scrolls by a particular amount, whereas window.scroll() scrolls to an absolute position in the document. See also window.scrollByLines() and window.scrollByPages().