How to synchronize scrolling positions for several iframes

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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.

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5条回答

滥情空心

2020-11-30 06:29

To synchronise an arbitrary number of elements use the following code:

jQuery.fn.synchroniseScroll = function() {

        var elements = this;
        if (elements.length <= 1) return;

        elements.scroll(
        function() {
            var left = $(this).scrollLeft();
            var top = $(this).scrollTop();
            elements.each(
            function() {
                if ($(this).scrollLeft() != left) $(this).scrollLeft(left);
                if ($(this).scrollTop() != top) $(this).scrollTop(top);
            }
            );
        });
    }

Using this is SUPER simple. Lets say you have several divs defined as:

<div class=”scrollDiv” style=”overflow:auto;”> .. some large content</div>

To synchronize the scrollbars’ on all divs with the class scrollDiv all you need to write is:

$(“.scrollDiv”).synchroniseScroll();

Source: http://blogs.msdn.com/b/matt/archive/2009/03/19/synchronizing-scrollbars-using-jquery.aspx

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梦谈多话

2020-11-30 06:41

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/>
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</div>

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

</body>
</html>

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你的背包

2020-11-30 06:41

I think this answer can fix the infinite loop.

      var jsScroll0;
      var jsScroll1;
      windows[0].on('scroll.scrollInTheSameTime', function() {
        if (jsScroll1 === true) {
          jsScroll1 = false;
          return;
        }
        jsScroll0 = true;
        windows[1].scrollTop(windows[0].scrollTop());
        windows[1].scrollLeft(windows[0].scrollLeft());
      });
      windows[1].on('scroll.scrollInTheSameTime', function() {
        if (jsScroll0 === true) {
          jsScroll0 = false;
          return;
        }
        jsScroll1 = true;
        windows[0].scrollTop(windows[1].scrollTop());
        windows[0].scrollLeft(windows[1].scrollLeft());
        // jsScroll = false;
      });

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死守一世寂寞

2020-11-30 06:44

Accepted solution works only if divs have the same width. If not, it causes an infinite loop: #div1 scrolls #div2, then #div2's scroll event scrolls #div1 etc :)

Edited solution:

var skip = false;
$("#div1").scroll(function () {
    if (skip){skip=false; return;} else skip=true; 
    $("#div2").scrollTop($("#div1").scrollTop());
    $("#div2").scrollLeft($("#div1").scrollLeft());
});
$("#div2").scroll(function () { 
    $("#div1").scrollTop($("#div2").scrollTop());
    $("#div1").scrollLeft($("#div2").scrollLeft());
});

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佛祖请我去吃肉

2020-11-30 06:54
I synchronize overflowed div's using code like this:
```
frame1.onscroll = function(e) {
   frame2.scrollTop = frame1.scrollTop;
   frame2.scrollLeft = frame1.scrollLeft;
 };
```
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