【发布时间】：2021-08-07 21:37:20
【问题描述】：
我在 Jumbotron 部分的代码中找不到减小输入窗口宽度的方法。我看不到/找不到任何控制输入窗口宽度的代码。下面的代码是来自 Bootstrap v5 的代码。如何缩短输入窗口的宽度，使其保持居中并保持响应速度？
<!doctype html>
<html>
<head>
<!-- Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous">
<!-- Code for jQuery -->
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<!-- Bootstrap Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/js/bootstrap.bundle.min.js" integrity="sha384-JEW9xMcG8R+pH31jmWH6WWP0WintQrMb4s7ZOdauHnUtxwoG2vI5DkLtS3qm9Ekf" crossorigin="anonymous"></script>
<!-- Code for FontAwesome -->
<link href="Desktop/FontAwesome/fontawesome-free-icons/css/all.css" rel="stylesheet">
<title>Project App Landing Page</title>
<style type="text/css">
.jumbotron{
background-image: url(blueSky.jpg);
min-height: 450px;
text-align: center;
}
#appSummary {
text-align: center;
margin-top: 50px;
margin-bottom: 50px;
}
</style>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container-fluid">
<a class="navbar-brand" href="#">MyApp</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">About</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Download The App</a>
</li>
</ul>
<form class="d-flex">
<div class="col-xs-4">
<input class="form-control" type="email" placeholder="Email" aria-label="Email">
<input class="form-control" type="password" placeholder="Password" aria-label="password">
<button class="btn btn-success" type="submit">Log in</button>
</div>
</form>
</div>
</div>
</nav>
<div class="jumbotron">
<h1 class="display-3" >My Awesome App!</h1>
<p class="lead">This is why YOU should download this fantastic app!</p>
<hr class="m-y-2">
<p>Want to know more? Join our mailing list!</p>
<form>
<div class="input-group mb-3">
<span class="input-group-text">@</span>
<input type="email" id="email" class="form-control" placeholder="Your email" aria-label="Email" aria-describedby="basic-addon1">
<button type="submit" class="btn btn-primary btn-md">Sign up</button>
</div>
</form>
</div>
<div class="container">
<div class="row" id="appSummary">
<h1>Why This App Is Awesome</h1>
<p class="lead">Summary, once again, of your app's awesomeness</p>
</div>
<div class="row row-cols-1 row-cols-md-3 g-4">
<div class="col">
<div class="card h-100">
<img src="cardPic.png" class="card-img-top" alt="Card Image">
<div class="card-body">
<h5 class="card-title"><i class="fas fa-radiation-alt"></i>Card title</h5>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
</div>
<div class="col">
<div class="card h-100">
<img src="cardPic.png" class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title"><i class="far fa-heart"></i>Card title</h5>
<p class="card-text">This card has supporting text below as a natural lead-in to additional content.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
</div>
<div class="col">
<div class="card h-100">
<img src="cardPic.png" class="card-img-top" alt="...">
<div class="card-body">
<h5 class="card-title"><i class="fas fa-pump-medical"></i>Card title</h5>
<p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.</p>
</div>
<div class="card-footer">
<small class="text-muted">Last updated 3 mins ago</small>
</div>
</div>
</div>
</div>
</div>
<div class="container">
<div class="row">
</div>
</div>
</body>
</html>
【问题讨论】：
标签： javascript html css forms twitter-bootstrap