How do I open my jQuery modal as wide as my elements but no wider?

I'm using JQuery 1.12.4. I have the following DIV, which I intend to open as a dialog.

<div id="loginBox" style="display:none">
    <div>Login/Sign Up</div>
    <div id="loginLogos">
            <a href="/auth/google"><img border="0" alt="Google" src="http://www.racertracks.com/assets/google_plus_icon-8d7622763257233cf58e0465806f58d7c4b82b85271c2d03d0e02b2fadc4ac76.jpg"></a>
            <a href="/auth/facebook"><img border="0" alt="Facebook" src="http://runtrax.devbox.com:3000/assets/facebook-b74d7c49fd91aa6ca76518bf46c7b75fa3b23f47028bea4b2ffaa39f5776dd91.png"></a>
            <a href="/auth/twitter"><img border="0" alt="Twitter" src="http://runtrax.devbox.com:3000/assets/twitter_icon-7dbf8db24c3ad328ea28cba340e4f53e033b64b149850324822cdb622d77f331.png"> </a>
 </div></div>

What I'm noticing is that when I reduce the width of my screen to around 320 pixels (to simulate a mobile browser width), the dialog is opening wider than the total width of the elements — there is a lot of white space to the right of the images. See the Fiddle here -- https://jsfiddle.net/g4a60Lq7/3/ . How can I make the dialog open as wide as the elements and no wider? Below is how I'm opening the dialog …

  var opt;
opt = {
  autoOpen: false,
  modal: true,
  width: 'auto',
  dialogClass: 'noTitle',
  focus: function() {
    return $(this).dialog('option', 'width', $('#loginBox').width() + 50);
  }
};
$("#loginBox").dialog(opt);
return $("#loginBox").dialog("open");

Edit: Wanted to post the image in response to pritishvaidya's second plunker ...

You can try this jsfiddle: https://jsfiddle.net/43f5qjc8/7/. Since the image source is not very reliable, here is another jsfiddle with smaller images from another source: https://jsfiddle.net/43f5qjc8/13/.

It involves some Javascript to calculate the minimial width needed to display the content, which may wrap on several lines. If there is a way to get the same result with CSS only, I haven't found it.

Here is the Javascript code:

$(function () {
    $('.opendialog').click(function () { openDialog(); });
    function openDialog() {
        var opt = {
            autoOpen: false,
            modal: true,
            width: 'auto',
            dialogClass: 'noTitle',
            focus: function () {
                var width = 0;
                $('#loginLogos > .logoRow').each(function () {
                    var x = $(this).position().left;
                    var w = $(this).outerWidth();
                    var tmpWidth = x + w;
                    width = Math.max(width, tmpWidth);
                });
                $('#loginLogos').width(width);
                var outerWidth = $('#loginBox').outerWidth();
                $('#loginLogos').width('auto');
                return $(this).dialog('option', 'width', outerWidth);
            }
        };
        $("#loginBox").dialog(opt);
        return $("#loginBox").dialog("open");
    }
});

The HTML markup:

<a href='#' class="opendialog">Open</a>
<div id="loginBox" style="display:none">
    <div>Login/Sign Up</div>
    <div id="loginLogos">
        <div class="logoRow">
            <a href="/auth/google"><img border="0" alt="Google" src="..."></a>
            <a href="/auth/facebook"><img border="0" alt="Facebook" src="..."></a>
        </div>
        <div class="logoRow">
            <a href="/auth/twitter"><img border="0" alt="Twitter" src="..."></a>
            <a href="/auth/linkedin"><img border="0" alt="LinkedIn" src="..."></a>
        </div>
    </div>
</div>

And the CSS styles:

body
{
    background-color: gray;
}

#loginBox
{
    font-family: 'russo_oneregular';
    font-size: 20px;
    display: inline-block;
}

#loginLogos
{
    position: relative;
}

.logoRow
{
    display: inline-block;
}

Just use Bootstrap modal popup structure that is totally responsive.

<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog">   
  <!-- Modal content-->
  <div class="modal-content">
    <div class="modal-header">
      <button type="button" class="close" data-dismiss="modal">&times;</button>
      <h4 class="modal-title">Modal Header</h4>
    </div>
    <div class="modal-body">       

    </div>
    <div class="modal-footer">
      <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
    </div>
  </div>   
</div>

https://jsfiddle.net/zigri2612/0o41yogx/

You need a bit of CSS to modify the max-width of the modal and the box-sizing. Here's your modified example: https://jsfiddle.net/elektronik/3ez3tm3f/1/

The main change is .ui-widget.ui-widget-content[class] { max-width: 90vw; } .ui-widget.ui-widget-content[class] { max-width: 90vw; } .

vw is a very useful modern, widely supported CSS unit.

The few other changes (compared to your original fiddle) prevent the modal content from overflowing. box-sizing: border-box; is present in all modern CSS resets.

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