Bootstrap modal body max height 100%

Question

I have a custom sized (80% height width) bootstrap modal body and it scrolls (body content will overflow on some sized screens)

There are 2 problems:

1. I

Answer 1

Here is a fully working Sass solution, but it requires flexbox.

  // don't clamp modal height when screen is shorter than 400px
  // .modal-body is short in that case, and the default behavior
  // (entire modal will scroll) is easier to use
  @media(min-height:400px)
    .modal
      // use top/bottom margin here instead of .modal-dialog
      // so that .modal-dialog can use height: 100%
      margin: 30px
      // without overflow: visible the shadow will be clipped
      // at the bottom
      overflow: visible

      > .modal-dialog
        margin: 0 auto
        // height must be explicitly set for .modal-content to
        // use percentage max-height
        height: 100%

        > .modal-content
          display: flex
          flex-direction: column
          max-height: 100%

          > .modal-header,
          > .modal-footer,
            // don't allow header/footer to grow or shrink
            flex: 0 0 auto

          > .modal-body
            // allow body to shrink but not grow
            flex: 0 1 auto
            // make body scrollable instead of entire modal
            overflow-y: auto