导致溢出的引导程序表单

Question

问题：我正在尝试构建一个注册表单，由于某种原因，如果其中包含任何表单组，则屏幕右侧会出现少量溢出。

已经完成： 我使用了Chromium开发工具，发现如果删除每个.form-group，则溢出会消失。我还搜索了堆栈溢出和Google，但都没有结果。

当前代码： 这是我的表格（cdn中也包含所有引导程序）

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css" integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay" crossorigin="anonymous">

    <div class="content">
        <div class="row">
            <div class="col-sm-12 col-md-3 col-lg-3 col-xl-4"></div>
            <div class="col-sm-12 col-md-6 col-lg-6 col-xl-4">
                <form class="">

                  <div class="form-group">
                    <label for="email">Email address</label>
                    <input type="email" class="form-control" id="email" name="email" placeholder="Enter email">
                  </div>

                  <div class="form-group">
                    <label for="username">Username</label>
                    <input type="text" class="form-control" id="username" name="username" placeholder="Enter username">
                  </div>

                  <div class="row">
                    <div class="col-sm-6 col-md-6 col-lg-6 col-xl-6">
                            <div class="form-group">
                            <label for="password">Password</label>
                            <input type="password" class="form-control" id="password" name="password" placeholder="Password">
                            </div>
                        </div>
                        <div class="col-sm-6 col-md-6 col-lg-6 col-xl-6">
                            <div class="form-group">
                                <label for="confirmpassword">Confirm Password</label>
                                <input type="password" class="form-control" id="confirmpassword" name="confirmpassword" placeholder="Confirm Password">
                            </div>
                        </div>
                    </div>
                    <div class="text-center">
                    <button type="submit" class="btn btn-primary">Submit</button>
                  </div>
                </form>
            </div>
        </div>


    </div>

.content是：

.content {
    padding-left: 10px;
    padding-right: 10px;
}

预期结果： 我确定你是从标题中猜出来的，但是..
预期：没有溢出，过着幸福的生活。
实际：轻微的溢出和大量的悲伤

Answer 1

在overflow: hidden; CSS中添加.content：

.content {
 overflow: hidden;
 padding-left: 10px;
 padding-right: 10px;
}

下面的演示：

.content {
  overflow: hidden;
  padding-left: 10px;
  padding-right: 10px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />

<div class="content">
  <div class="row">
    <div class="col-sm-12 col-md-3 col-lg-3 col-xl-4"></div>
    <div class="col-sm-12 col-md-6 col-lg-6 col-xl-4">
      <form class="">

        <div class="form-group">
          <label for="email">Email address</label>
          <input type="email" class="form-control" id="email" name="email" placeholder="Enter email">
        </div>

        <div class="form-group">
          <label for="username">Username</label>
          <input type="text" class="form-control" id="username" name="username" placeholder="Enter username">
        </div>

        <div class="row">
          <div class="col-sm-6 col-md-6 col-lg-6 col-xl-6">
            <div class="form-group">
              <label for="password">Password</label>
              <input type="password" class="form-control" id="password" name="password" placeholder="Password">
            </div>
          </div>
          <div class="col-sm-6 col-md-6 col-lg-6 col-xl-6">
            <div class="form-group">
              <label for="confirmpassword">Confirm Password</label>
              <input type="password" class="form-control" id="confirmpassword" name="confirmpassword" placeholder="Confirm Password">
            </div>
          </div>
        </div>
        <div class="text-center">
          <button type="submit" class="btn btn-primary">Submit</button>
        </div>
      </form>
    </div>
  </div>


</div>

或者，您可以使用引导程序的内置.container类而不是自定义类（我甚至在使用引导程序时建议使用此类，更多信息here），并且您甚至不需要应用overflow: hidden骇客：

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />

<div class="container">
  <div class="row">
    <div class="col-sm-12 col-md-3 col-lg-3 col-xl-4"></div>
    <div class="col-sm-12 col-md-6 col-lg-6 col-xl-4">
      <form class="">

        <div class="form-group">
          <label for="email">Email address</label>
          <input type="email" class="form-control" id="email" name="email" placeholder="Enter email">
        </div>

        <div class="form-group">
          <label for="username">Username</label>
          <input type="text" class="form-control" id="username" name="username" placeholder="Enter username">
        </div>

        <div class="row">
          <div class="col-sm-6 col-md-6 col-lg-6 col-xl-6">
            <div class="form-group">
              <label for="password">Password</label>
              <input type="password" class="form-control" id="password" name="password" placeholder="Password">
            </div>
          </div>
          <div class="col-sm-6 col-md-6 col-lg-6 col-xl-6">
            <div class="form-group">
              <label for="confirmpassword">Confirm Password</label>
              <input type="password" class="form-control" id="confirmpassword" name="confirmpassword" placeholder="Confirm Password">
            </div>
          </div>
        </div>
        <div class="text-center">
          <button type="submit" class="btn btn-primary">Submit</button>
        </div>
      </form>
    </div>
  </div>


</div>