使用
<div class="col-xs-4"></div>
或者“col-md-4”xs只是为了在这个小预览中显示
<link href="https://stackpath.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<div class="container">
<form role="form" action="" method="post">
<div class="row">
<div class="col-xs-12 col-md-offset-3">
<div class="col-md-12">
<h3>Information</h3>
<!-- This is fine because I want the name to be full size of the line -->
<div class="form-group">
<label class="control-label">Name</label>
<input maxlength="200" type="text" required="required" class="form-control" placeholder=" Name" />
</div>
<!-- Here I want to break 3 input side by side -->
<!-- Not working. Each rules is in one line -->
<div class="form-group">
<label class="control-label">Rules</label>
<div class="row">
<div class="col-xs-4">
<input type="number" class="form-control" required="required" placeholder="Rule1" />
</div>
<div class="col-xs-4">
<input type="number" class="form-control" required="required" placeholder="Rule2" /> </div>
<div class="col-xs-4">
<input type="number" class="form-control" required="required" placeholder="Rule3" /> </div>
</div>
</div>
</div>
<button class="btn btn-primary nextBtn btn-lg pull-right" type="button" >Next</button>
</div>
</div>
</div>
</form>
</div>