JSFiddle - React, Tailwind, and code Playground

by Chris Rebert

HTML

<div class="floated">
    <small>this floats fine</small>
    <input class="form-control" placeholder="Search" type="text">
    <input class="form-control" placeholder="Search" type="text">
</div>
<div class="floated">
    <small>Floats only in Firefox (100% width elsewhere)</small>
    <div class="input-group">
        <input class="form-control" placeholder="Search" type="text">
        <span class="input-group-btn">
            <button class="btn btn-default" type="button">
                Go
            </button>
        </span>
    </div>
    <div class="input-group">
        <input class="form-control" placeholder="Search" type="text">
        <span class="input-group-btn">
            <button class="btn btn-default" type="button">
                Go
            </button>
        </span>
    </div>
</div>

CSS

.floated {
  float: left;
  padding: 5px;
  border: 1px dashed #000;
}
.form-control {
  display: block;
  width: 100%;
}
.input-group {
  position: relative;
  display: table;
  border-collapse: separate;
}
.input-group .form-control {
  display: table-cell;
  position: relative;
  z-index: 2;
  float: left;
  width: 100%;
  margin-bottom: 0;
}
.input-group-btn {
  display: table-cell;
  position: relative;
  font-size: 0;
  white-space: nowrap;
  width: 1%;
  vertical-align: middle;
}