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How to synchronize scrolling positions for several iframes

I have an HTML layout based on tabs (say 5). In each tab I load an iframe. The iframe contents are variations of one another that the user can compare by switching tabs.

How can I, in javascript, synchronize the scrolling of all iframes vertically and horizontally? In other words, scrolling in one iframe should scroll by the same amount all other iframes, allowing the user to compare the same data.

Bonus points: iframe content is loaded only when the user opens the tab for the first time. So newly opened iframes should directly scroll to the same place as already opened iframes.

Thanks.

like image 435
JB Hurteaux Avatar asked Apr 17 '09 21:04

JB Hurteaux


1 Answers

While this works for divs, it does not work for iframes.

Here's what you can do,

$($('#iframe1').contents()).scroll(function(){
    $($('#iframe2').contents()).scrollTop($(this).scrollTop());
}); 

With jQuery's scroll event, you should be able to synchronize them.

Edit: No plugins required. Here's the code that worked for me:

<html>
<head>
<SCRIPT language="javascript" type="text/javascript" src="jquery-1.3.2.js"></SCRIPT>
<SCRIPT>
$(document).ready(function()
{
$("#div1").scroll(function () { 
        $("#div2").scrollTop($("#div1").scrollTop());
        $("#div2").scrollLeft($("#div1").scrollLeft());
    });
$("#div2").scroll(function () { 
        $("#div1").scrollTop($("#div2").scrollTop());
        $("#div1").scrollLeft($("#div2").scrollLeft());
    });

});

</SCRIPT>
</head>
<body>
<div id="div1" style="overflow:auto;height:100px;width:200px;border:1px solid black;">
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
</div>

<div id="div2" style="overflow:auto;height:100px;width:200px;border:1px solid black;">
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
Test..................................................................................................................................................................................................................................................................................test
<BR/><BR/>
</div>

</body>
</html>
like image 146
Andrew Ensley Avatar answered Nov 15 '22 15:11

Andrew Ensley



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