Bootstrap 3 modal vertical position center

Question

This is a two part question:

1. How can you position the modal vertically in the center when you don\'t know the exact height of the modal?

2. Is

Answer 1

Adding this simple css also works.

.modal-dialog {
  height: 100vh !important;
  display: flex;
}

.modal-content {
  margin: auto !important;
  height: fit-content !important;
}