How to put scroll bar only for modal-body?

Answer 1

A simple js solution to set modal height proportional to body's height :

$(document).ready(function () {
    $('head').append('');
});

body's height has to be 100% :

html, body {
    height: 100%;
    min-height: 100%;
}

I set modal body height to 80% of body, this can be of course customized.

Hope it helps.