如何根据iframe大小调整引导模式的大小？

Question

Actually i have an iframe page where i load some data from database in a table so the height of the iframe would be different.

Like now the modal is loading fine the iframe and if it height is bigger than 300px there will be a scroll bar but the issue is when the content is smaller than 300px like you can see on the screen there is a lot of white space.

So i would be able to remove that whitespace and size the modal according to iframe height by setting a max height where should compare the scrollbars.

Here is the modal code:

  <div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header bg-light">
                    <h5 class="modal-title" id="exampleModalLabel">User update: </h5>
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                 <div id="body" class="modal-body mb-0 p-0">

                    <div class="embed-responsive z-depth-1-half" style="height: 100%; max-height:300px;">
                        <iframe id="frame" class="embed-responsive-item" src="user.aspx"></iframe>
                    </div>

                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-primary">Save</button>
                </div>
            </div>
        </div>
    </div>

Answer 1

Remove height:100% and add

#body {
    max-height:300px;
    overflow-y:scroll;
}

I hope this will work.