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POiScroll Scrolling Past Bottom?
 

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    <p><s>You can easily see the problem on the first page here: <a href="http://m.vancouverislandlife.com/" rel="nofollow">http://m.vancouverislandlife.com/</a></p> <p>Scroll down (slide up) and allow the content to leave the page, and it doesn't bounce back and is lost forever. However, on pages whose content <em>does</em> overflow the page and is therefore supposed to be scrollable, the scrolling works correctly (see Accomodations > b&amp;b's and scroll down for an example of this).</p> <p>I noticed that on my computer, the scrolling on the first page is always stuck at <code>-899px</code>. I can't find anybody else who's experienced this problem and no matter what I try, I just can't fix it! Help!</p> <p>(It's not exactly urgent, however, as the target audience of iPhones and iPod Touches aren't affected by this since they have so little screen room.)</s></p> <p>Okay, new problem. To solve the iScroll issue, I just created a custom script. However, it's not working correctly on the <em>actual device</em>. On desktop browsers, it works just fine. On mobile, it occasionally jumps back to the top and won't recognize some touches. This is probably because of the way I cancelled the default event and had to resort to a bit of a hack. How can I fix this? (Yup - simple problem for a +500 bounty. Not bad, huh?)</p> <p>Here's the script, and the website is at the usual place:</p> <pre><code>function Scroller(content) { function range(variable, min, max) { if(variable &lt; min) return min &gt; max ? max : min; if(variable &gt; max) return max; return variable; } function getFirstElementChild(element) { element = element.firstChild; while(element &amp;&amp; element.nodeType !== 1) { element = element.nextSibling; } return element; } var isScrolling = false; var mouseY = 0; var cScroll = 0; var momentum = 0; if("createTouch" in document) { content.addEventListener('touchstart', function(evt) { isScrolling = true; mouseY = evt.pageY; evt.preventDefault(); }, false); content.addEventListener('touchmove', function(evt) { if(isScrolling) { evt = evt.touches[0]; var dY = evt.pageY - mouseY; mouseY = evt.pageY; cScroll += dY; momentum = range(momentum + dY * Scroller.ACCELERATION, -Scroller.MAX_MOMENTUM, Scroller.MAX_MOMENTUM); var firstElementChild = getFirstElementChild(content); content.style.WebkitTransform = 'translateY(' + range(cScroll, -(firstElementChild.scrollHeight - content.offsetHeight), 0).toString() + 'px)'; } }, false); window.addEventListener('touchend', function(evt) { isScrolling = false; }, false); } else { content.addEventListener('mousedown', function(evt) { isScrolling = true; mouseY = evt.pageY; }, false); content.addEventListener('mousemove', function(evt) { if(isScrolling) { var dY = evt.pageY - mouseY; mouseY = evt.pageY; cScroll += dY; momentum = range(momentum + dY * Scroller.ACCELERATION, -Scroller.MAX_MOMENTUM, Scroller.MAX_MOMENTUM); var firstElementChild = getFirstElementChild(content); content.style.WebkitTransform = 'translateY(' + range(cScroll, -(firstElementChild.scrollHeight - content.offsetHeight), 0).toString() + 'px)'; } }, false); window.addEventListener('mouseup', function(evt) { isScrolling = false; }, false); } function scrollToTop() { cScroll = 0; content.style.WebkitTransform = ''; } function performAnimations() { if(!isScrolling) { var firstElementChild = getFirstElementChild(content); cScroll = range(cScroll + momentum, -(firstElementChild.scrollHeight - content.offsetHeight), 0); content.style.WebkitTransform = 'translateY(' + range(cScroll, -(firstElementChild.scrollHeight - content.offsetHeight), 0).toString() + 'px)'; momentum *= Scroller.FRICTION; } } return { scrollToTop: scrollToTop, animationId: setInterval(performAnimations, 33) } } Scroller.MAX_MOMENTUM = 100; Scroller.ACCELERATION = 1; Scroller.FRICTION = 0.8; </code></pre>
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    1. COWhat happens if you set `bounce:true`? You might be aware of it but `position:fixed` doesn't work in mobile safari (until ios5). But then in ios5, you won't need any plugin as it supports kinetic scrolling [natively](http://johanbrook.com/browsers/native-momentum-scrolling-ios-5/). If changing the plugin is an option, have you looked at [touchScroll](https://github.com/neave/touch-scroll) and [scrollability](https://github.com/joehewitt/scrollability/)?
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    2. CO@Mrchief: `bounce: true` makes no difference and I don't want the user to be able to scroll past the edges anyway. I am aware of the fact that `position: fixed` doesn't work in mobile Safari (but it's not so much unsupported as it is ineffective because mobile Safari uses a moving viewport instead of a fixed one), I'm not targeting iOS5 anyways, and yes, changing the plugin is an option so I will look at those, thanks.
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    3. COI tried to setup this locally, but wasn't successful (maybe due to the ajax calls which I don't have the php for or maybe it was late in night). Is it possible for you to dump static html that I can play with (jsfiddle will screw up things)? Surprisingly, last year I was using something else for kinetic scrolling with good results, I couldn't find the same plugin now (and I have moved on from that client too). Anyway, I'll try again.
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