How to prevent background scrolling when Bootstrap 3 modal open on mobile browsers?

Question

How to prevent background scrolling when Bootstrap 3 modal open on mobile platforms? On desktop browsers the background is prevented from scrolling and works as it should.<

Answer 1

No scripts needed.

BS 3 sets a .modal-open class on body that you can use to set the position and overflow values (made with LESS).

body {
    font-family:'Open Sans';
    margin:0;

    &.modal-open {
        position:fixed;
        overflow:hidden;

        .modal { 
            overflow: scroll;

            @media only screen and (min-resolution:150dpi) and (max-width: @screen-sm),
            only screen and (-webkit-min-device-pixel-ratio:1.5) {
                overflow: scroll; 
                -webkit-overflow-scrolling: touch; 
            }
        }
    }   
}