html - 选择输入大于 Bootstrap 4 中的输入字段

Question

我有一个选择字段和两个输入字段，但选择标签比其他两个大(见图)。我正在使用 Bootstrap 4.3。有人可以帮我让它和另一个一样大吗？非常感谢您的帮助!

这是我的代码:

<div class="container content-center" id="margin">
    <form name="formcalc">
        <div class="form-group row">
            <label for="staticEmail" class="col-sm-2 col-form-label">Output 1</label>
            <select class="col-sm-10 form-control" id="mySelect" onchange="myFunction();setOne();">
                <option value="0">CHF 0</option>
                <option value="75000">CHF 75'000</option>
                <option value="100000">CHF 100'000</option>
            </select>
        </div>
        <fieldset disabled>
            <div class="form-group row">
                <label for="staticEmail" class="col-sm-2 col-form-label">Output 2</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" id="n1" name="txtres" value="CHF " readonly>
                </div>
            </div>
            <div class="form-group row">
                <label for="staticEmail" class="col-sm-2 col-form-label">Output 3</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" id="n2" name="txtres2" value="CHF " readonly>
                </div>
            </div>
        </fieldset>
        <button type="button" class="btn btn-outline-danger" id="toggle" data-toggle="modal"
            data-target="#exampleModal">
            button
        </button>
    </form>
    <hr class="featurette-divider">

    <section class="container">
        <p class="lead" id="demo"></p>
    </section>
</div>

picture

Answer 1

而不是给出 col-sm-10在 select 上元素，包装 select在<div class="col-sm-10"> - 请参阅下面的演示:

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" />
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.1/css/all.css" />
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>

<div class="container content-center" id="margin">
  <form name="formcalc">
    <div class="form-group row">
      <label for="staticEmail" class="col-sm-2 col-form-label">Output 1</label>
      <div class="col-sm-10">
        <select class="form-control" id="mySelect" onchange="myFunction();setOne();">
          <option value="0">CHF 0</option>
          <option value="75000">CHF 75'000</option>
          <option value="100000">CHF 100'000</option>
        </select>
      </div>
    </div>
    <fieldset disabled>
      <div class="form-group row">
        <label for="staticEmail" class="col-sm-2 col-form-label">Output 2</label>
        <div class="col-sm-10">
          <input type="text" class="form-control" id="n1" name="txtres" value="CHF " readonly>
        </div>
      </div>
      <div class="form-group row">
        <label for="staticEmail" class="col-sm-2 col-form-label">Output 3</label>
        <div class="col-sm-10">
          <input type="text" class="form-control" id="n2" name="txtres2" value="CHF " readonly>
        </div>
      </div>
    </fieldset>
    <button type="button" class="btn btn-outline-danger" id="toggle" data-toggle="modal" data-target="#exampleModal">
            button
        </button>
  </form>
  <hr class="featurette-divider">

  <section class="container">
    <p class="lead" id="demo"></p>
  </section>
</div>