javascript - How to sync the scroll bar for 2 iframe -


i have task launch 2 web pages in single html page , web page comparsion side side, have create 2 iframes each comparing web page, have problem on sync scroll bar behaviour, when move vertical scroll bar on left side web page(iframe1), scroll bar on right side web page(iframe2) move well. there know how it? or other method beside using iframe, available launch 2 web pages , sync scroll bar? thanx.

you can access iframe's window using contentwindow attribute.

register scroll handler, contentwindow.onscroll, , can scroll using scrollto.

security note: content of iframe's should same domain top-level page, before can access contentwindow's values, because cross-domain javascript access blocked.

frame1.contentwindow.onscroll = function(e) {    frame2.contentwindow.scrolltop = frame1.contentwindow.scrolltop;    frame2.contentwindow.scrollleft = frame1.contentwindow.scrollleft; };

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