How to fix parent page of Modal window (Twitter Bootstrap)?

Question

JavaScript

Used by Twitter Bootstrap.
It is necessary to fix (so as not to scroll) the parent page on which the modal window was opened.

By default, it scrolls along with the content of the modal window.

Answer 1

You can do without JS, when opening a modal window, Twitter Bootstrap itself sets the modal-open class for body. It will be enough to add to CSS
.modal-open { overflow: hidden; }

Answer 2

$('body').css('overflow','hidden');