Bootstrap 3 select input form inline

Question

I'm trying to get input and select option inline attached with each other like this demo using Bootstrap 2 (dead link).

Following Bootstrap 3 guidelines I manage to do this:

<div class="container">
    <div class="col-sm-7 pull-right well">
      <form class="form-inline" action="#" method="get">
        <div class="form-group col-sm-5">
          <input class="form-control" type="text" value="" placeholder="Search" name="q">
        </div>
        <div class="form-group col-sm-3">
          <select class="form-control" name="category">
              <option>select</option>
              <option>1</option>
              <option>2</option>
              <option>3</option>
          </select>
        </div>
        <button class="btn btn-primary col-sm-3 pull-right" type="submit">Search</button>
      </form>
    </div>
</div>

It's responsive, but input and select can't be attached without some nasty css hacks. I found lot of examples with attached buttons, but that does not work with select element.

Answer 1

I think I've accidentally found a solution. The only thing to do is inserting an empty <span class="input-group-addon"></span> between the <input> and the <select>.

Additionally you can make it "invisible" by reducing its width, horizontal padding and borders:

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>

<div class="input-group">
    <span class="input-group-addon" title="* Price" id="priceLabel">Price</span>
    <input type="number" id="searchbygenerals_priceFrom" name="searchbygenerals[priceFrom]" required="required" class="form-control" value="0">
    <span class="input-group-addon">-</span>
    <input type="number" id="searchbygenerals_priceTo" name="searchbygenerals[priceTo]" required="required" class="form-control" value="0">
  
    <!-- insert this line -->
    <span class="input-group-addon" style="width:0px; padding-left:0px; padding-right:0px; border:none;"></span>
  
    <select id="searchbygenerals_currency" name="searchbygenerals[currency]" class="form-control">
        <option value="1">HUF</option>
        <option value="2">EUR</option>
    </select>
</div>

Tested on Chrome and FireFox.