I am moving from Bootstrap 2 to Bootstrap 3. In the old version, I was using modals which had long content, and the modals automatically scrolled when a given max height was rea
Just add:
.modal-content {
height:250px;
overflow:auto;
}
The height can of course be adapted to your personal needs.
Working Example
Update:
It's actually pretty easy. Just add:
.modal-body {
max-height: calc(100vh - 212px);
overflow-y: auto;
}
to your css.
It uses vh and calc, which also happen to have a good browser support (IE9+).
This is based on this answer. Please read there for more detailed information, I won't copy his answer.
Working Example
If you have dynamic content this can be a pain. I used this to make sure it had the correct height and then it would scroll:
$('#modal').on('shown.bs.modal', function () {
$('.modal-dialog').css('height', $('.modal-dialog').height() );
});
$('#modal').on('hidden.bs.modal', function () {
$('.modal-dialog').css('height', 'auto');
});
You seem to be describing https://github.com/twbs/bootstrap/issues/14916 ("Modal overlay is above scrollbar "), which will be fixed in Bootstrap v3.3.1 by https://github.com/twbs/bootstrap/pull/14927 ("Fix modal backdrop overlaying the modal's scrollbar").