Scroll Down on a div/popup using iMacros? -

i not able scroll down using imacros on followers page on instagram user. code below scrolls down whole window, not popup under code.

url goto=javascript:window.scrollby(0,20000)

i think relevant div class _4gt3b, not expert , need help.

and here link of page:

i have searched issue lot , not able find solution. lot help.

if div class correct event command must work:

event type=keypress selector="div._4gt3b" key=35

swift