STYLE SWITCHER

jQuery – test if element is in viewport (visible on screen)

Untitled-1


$.fn.isOnScreen = function(){
    
    var win = $(window);
    
    var viewport = {
        top : win.scrollTop(),
        left : win.scrollLeft()
    };
    viewport.right = viewport.left + win.width();
    viewport.bottom = viewport.top + win.height();
    
    var bounds = this.offset();
    bounds.right = bounds.left + this.outerWidth();
    bounds.bottom = bounds.top + this.outerHeight();
    
    return (!(viewport.right < bounds.left || viewport.left > bounds.right || viewport.bottom < bounds.top || viewport.top > bounds.bottom));
    
};

$('.box').click(function(){
    alert($('.orange').isOnScreen());
});

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