I am facing an issue with my left-side vertical CSS menu where the subnavs pop out to the right. The problem arises when the last menu item has numerous subnavs that extend below the window fold.
I was wondering if there is a way, using either CSS or jQuery, to detect this beforehand and adjust the position accordingly so that all submenu items remain visible?
Check out the example at the following link (you may need to adjust the window height):
<!--demo is at following link-->
Check out this updated solution using the power of jQuery: http://jsfiddle.net/otcq2ne0/1/
$('body').on('mouseenter mouseover', '.vmdrop', function() {
var subMenu = $('.vmenu-dropdown', this);
if (subMenu.length) {
var position = subMenu[0].getBoundingClientRect();
if (position.bottom > window.innerHeight) {
var threshold = position.top;
var buffer = 10;
var difference = window.innerHeight - (position.bottom + buffer);
if (Math.abs(difference) > threshold) {
difference = '-' + (threshold + buffer);
}
if (Math.abs(difference) > 0) {
subMenu.css({ top: difference + 'px' });
}
}
}
});
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