Question

使用以下HTML：

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta name="description" content="">
    <meta name="author" content="">
    <link rel="icon" href="../../../../favicon.ico">

    <title>Starter Template for Bootstrap</title>

    <!-- Bootstrap core CSS -->
    <link
      rel="stylesheet"
      href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css"
      integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb"
      crossorigin="anonymous">


    <!-- jQuery libraries -->
    <script
      src="https://code.jquery.com/jquery-3.2.1.min.js"
      integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
      crossorigin="anonymous"></script>
    <script
      src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"
      integrity="sha256-VazP97ZCwtekAsvgPBSUwPFKdrwD3unUfSGVYrahUqU="
      crossorigin="anonymous"></script>

    <!-- Custom styles -->
    <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">

  </head>

  <body>

    <nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
      <a class="navbar-brand" href="#">Navbar</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>

      <div class="collapse navbar-collapse" id="navbarsExampleDefault">
        <ul class="navbar-nav mr-auto">
          <li class="nav-item active">
            <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
          </li>
          <li class="nav-item">
            <a class="nav-link disabled" href="#">Disabled</a>
          </li>
          <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" href="http://example.com" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
            <div class="dropdown-menu" aria-labelledby="dropdown01">
              <a class="dropdown-item" href="#">Action</a>
              <a class="dropdown-item" href="#">Another action</a>
              <a class="dropdown-item" href="#">Something else here</a>
            </div>
          </li>
        </ul>
        <form class="form-inline my-2 my-lg-0">
          <input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
          <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
        </form>
      </div>
    </nav>

    <main role="main" class="container">

    <div class="input-group mb-3">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon1">@</span>
      </div>
      <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1">
    </div>

    <div class="input-group mb-3">
      <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="basic-addon2">
      <div class="input-group-append">
        <span class="input-group-text" id="basic-addon2">@example.com</span>
      </div>
    </div>

    <label for="basic-url">Your vanity URL</label>
    <div class="input-group mb-3">
      <div class="input-group-prepend">
        <span class="input-group-text" id="basic-addon3">https://example.com/users/</span>
      </div>
      <input type="text" class="form-control" id="basic-url" aria-describedby="basic-addon3">
    </div>

    <div class="input-group mb-3">
      <div class="input-group-prepend">
        <span class="input-group-text">$</span>
      </div>
      <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
      <div class="input-group-append">
        <span class="input-group-text">.00</span>
      </div>
    </div>

    </main><!-- /.container -->

    <!-- Bootstrap core JavaScript
    ================================================== -->
    <!-- Placed at the end of the document so the pages load faster -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>
  </body>
</html>

但是，当我实际呈现页面时，input-group-append部分似乎不起作用。这是一个截图：

然而，这显然不像示例here。

不确定我在这里应该做些什么，这是Bootstrap 4.0 Beta的错误吗？

快速补充说明，如果它以某种方式相关，我正在使用Django 2.0。

Answer 1

我今天刚遇到这个。我仔细检查了我的风格和脚本，一切都很好。我没有使用append和preped，而是使用了输入 - group-addon 和 input-group-btn 。

请参阅此link。

Answer 2

没有任何错误。

你包含了很多不必要的东西。 jQuery正在造成很多破坏。添加可能发生冲突的脚本时要小心。请参阅我的代码

<!doctype html>
<html lang="en">
<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">

    <title>Starter Template for Bootstrap</title>


</head>

<body>

<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarsExampleDefault">
        <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
                <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Link</a>
            </li>
            <li class="nav-item">
                <a class="nav-link disabled" href="#">Disabled</a>
            </li>
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="http://example.com" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
                <div class="dropdown-menu" aria-labelledby="dropdown01">
                    <a class="dropdown-item" href="#">Action</a>
                    <a class="dropdown-item" href="#">Another action</a>
                    <a class="dropdown-item" href="#">Something else here</a>
                </div>
            </li>
        </ul>
        <form class="form-inline my-2 my-lg-0">
            <input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
            <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
        </form>
    </div>
</nav>

<main role="main" class="container">

    <div class="input-group mb-3">
        <div class="input-group-prepend">
            <span class="input-group-text" id="basic-addon1">@</span>
        </div>
        <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1">
    </div>

    <div class="input-group mb-3">
        <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="basic-addon2">
        <div class="input-group-append">
            <span class="input-group-text" id="basic-addon2">@example.com</span>
        </div>
    </div>

    <label for="basic-url">Your vanity URL</label>
    <div class="input-group mb-3">
        <div class="input-group-prepend">
            <span class="input-group-text" id="basic-addon3">https://example.com/users/</span>
        </div>
        <input type="text" class="form-control" id="basic-url" aria-describedby="basic-addon3">
    </div>

    <div class="input-group mb-3">
        <div class="input-group-prepend">
            <span class="input-group-text">$</span>
        </div>
        <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
        <div class="input-group-append">
            <span class="input-group-text">.00</span>
        </div>
    </div>

</main><!-- /.container -->

<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/js/bootstrap.min.js" integrity="sha384-a5N7Y/aK3qNeh15eJKGWxsqtnX/wWdSZSKp+81YjTmS15nvnvxKHuzaWwXHDli+4" crossorigin="anonymous"></script>

</body>
</html>

Answer 3

Bootstrap 4退出了alpha（此答案时为4.1），现在应该可以使用以下内容：

input-group-btn

因此，请使用课程input-group-prepend以及input-group-prepend（或input-group-text）和string::find()。

检查输入组this_contribution的4.1版文档。

Answer 4

如果其他人提出同样的问题，我就是这样做的

<div class="input-group mb-3">
  <input type="password" class="form-control" placeholder="Insert password...">
  <button class="btn btn-secondary" id="btn-show-psw" type="button">show</button>
</div>

尽量避免使用 input-group-append 或其他任何东西。仅在组本身中声明了 input-group。

无论如何，我在 here 的官方文档中没有看到这种方式

Bootstrap 4输入组附加不起作用

4 个答案: