How to programmatically disable page scrolling with jQuery

Question

Using jQuery, I would like to disable scrolling of the body:

My idea is to:

1. Set body{ overflow: hidden;}
2. Capture the current scrollTop();/scrollLeft()
3. Bind to the body scroll event, set scrollTop/scrollLeft to the captured value.

Is there a better way?

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Update:

Please see my example, and a reason why, at http://jsbin.com/ikuma4/2/edit

I am aware someone will be thinking "why does he not just use position: fixed on the panel?".

Please do not suggest this as I have other reasons.

Answer 1

The only way I've found to do this is similar to what you described:

1. Grab current scroll position (don't forget horizontal axis!).
2. Set overflow to hidden (probably want to retain previous overflow value).
3. Scroll document to stored scroll position with scrollTo().

Then when you're ready to allow scrolling again, undo all that.

Edit: no reason I can't give you the code since I went to the trouble to dig it up...

// lock scroll position, but retain settings for later
var scrollPosition = [
  self.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
  self.pageYOffset || document.documentElement.scrollTop  || document.body.scrollTop
];
var html = jQuery('html'); // it would make more sense to apply this to body, but IE7 won't have that
html.data('scroll-position', scrollPosition);
html.data('previous-overflow', html.css('overflow'));
html.css('overflow', 'hidden');
window.scrollTo(scrollPosition[0], scrollPosition[1]);


// un-lock scroll position
var html = jQuery('html');
var scrollPosition = html.data('scroll-position');
html.css('overflow', html.data('previous-overflow'));
window.scrollTo(scrollPosition[0], scrollPosition[1])