JavaScript
Article
By Sam Deering

jQuery check if element is in view

By Sam Deering
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Some more jQuery snippets to check if element is in view.

function isScrolledIntoView(elem)
{
    var docViewTop = $(window).scrollTop();
    var docViewBottom = docViewTop + $(window).height();

    var elemTop = $(elem).offset().top;
    var elemBottom = elemTop + $(elem).height();

    return ((elemBottom = docViewTop));
}

isInView: function(elem)
{
    var docViewTop = $(window).scrollTop(),
        docViewBottom = docViewTop + $(window).height(),
        elemTop = $(elem).offset().top,
        elemBottom = elemTop + $(elem).height();
    return ((elemBottom = docViewTop));
}

The best method I have found so far is the jQuery appear plugin. Works like a charm.

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