How to make select2 v4 search boxes responsive in the bootstrap 3 nav bar?

Question

I've placed select2 search boxes inside a bootstrap 3 navbar. The issue is when I resize the browser, the search boxes don't auto-resize, and the navbar ends up overflowing. It's not clear to be how to make the select2 boxes responsive.

Please see here: https://jsfiddle.net/vgoklani/3vtrgkc7/13/

You will have to resize the Result window in jsfiddle. The search boxes are hidden if the width isn't sufficiently long, and will not show up. What I would like is for the search boxes to be responsive, such that their width resizes based on the width of the window.

    <nav class="navbar navbar-dark navbar-fixed-top">
        <div class="container-fluid">

            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar">
                    <i class="fa fa-chevron-down fa-2x" style="font-size: 16px;color:#fff"></i>
                </button>
                <a class="navbar-brand">NAME</a>
            </div>

            <div class="collapse navbar-collapse" id="navbar">
                <form class="navbar-form navbar-left" role="search">
                    <div class="form-group">
                        <select multiple class="Search1" multiple="multiple" id="Search1" style="width:400px;height:34px"></select>
                    </div>
                </form>

                <form class="navbar-form navbar-left" role="search">
                    <div class="form-group">
                        <select multiple class="Search2" multiple="multiple" id="Search2" style="width:400px;height:34px"></select>
                    </div>
                </form>

            </div>
        </div>
    </nav>

Thanks

Answer 1

I am not sure to understand what you want to do.

Can you try this:

@media screen and (max-width: 767px) {
    .select2 {
        width: 100% !important;
    }
}