Vertically centering Bootstrap modal window

Question

I would like to center my modal on the viewport (middle) I tried to add some css properties

 .modal { position: fixed; top:50%; left:50%; }   

Answer 1

This does the job : http://jsfiddle.net/sRmLV/1140/

It uses a helper-div and some custom css. No javascript or jQuery required.

HTML (based on Bootstrap's demo-code)

Launch demo modal



    

        

            

                

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Modal title

                
                
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CSS

.vertical-alignment-helper {
    display:table;
    height: 100%;
    width: 100%;
    pointer-events:none; /* This makes sure that we can still click outside of the modal to close it */
}
.vertical-align-center {
    /* To center vertically */
    display: table-cell;
    vertical-align: middle;
    pointer-events:none;
}
.modal-content {
    /* Bootstrap sets the size of the modal in the modal-dialog class, we need to inherit it */
    width:inherit;
    max-width:inherit; /* For Bootstrap 4 - to avoid the modal window stretching full width */
    height:inherit;
    /* To center horizontally */
    margin: 0 auto;
    pointer-events: all;
}