响应式设计无法使用chrome dev工具，但浏览器可以
sid*_*diq 6 html google-chrome google-chrome-devtools responsive-design
我尝试使用chrome dev工具检查响应式设计。但这是行不通的。
当我调整浏览器大小时，同样可以正常工作。
我无法确定可能是什么问题？有人可以帮我找出问题吗？
代码如下
<html>
<head>
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
<link rel="stylesheet" href="css/styles.css" />
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-lg-8 col-md-8 hidden-sm-down" style="background-color:#4E5B5C; color:#fff"><span><small>Heading heading heading 1</small></span></div>
<div class="col-lg-2 col-md-2 hidden-sm-down" style="background-color:#626F70; color:#fff"><span>Heading 2</span></div>
<div class="col-lg-2 col-md-2 hidden-sm-down" style="background-color:#475859; color:#fff"><span>Heading 3</span></div>
</div>
<div class="row" style="background-color: #2B3536;">
<div class="col-lg-2 col-md-2 col-sm-2 col-2 logo-div align-self-center"><img class="img-fluid" src="https://dummyimage.com/127x50/2b3536/fff"></div>
<div class="col-lg-7 col-md-8 col-sm-8 col-8">
<nav class="navbar navbar-wrapper navbar-fixed-top navbar-toggleable-sm navbar-expand-sm">
<div class="container">
<a href="#" class="hidden-md-up mr-3" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false">
<i class="fa fa-bars fa-lg text-white"></i>
</a>
<!--<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>-->
<div class="collapse navbar-collapse pl-sm-2" id="navbarNavDropdown">
<ul class="navbar-nav header-nav">
<li class="nav-item">
<a class="nav-link" href="#">Header menu item 1</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Header menu item 2</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Header menu item 3</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Header menu item 4</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Header menu item 5</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Header menu item 6</a>
</li>
<!--<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown link
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<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>
</div>
</div>
</nav>
</div>
<div class="col-lg-3 col-md-2 col-sm-2 col-2 align-self-center">
<div class="input-group">
<input class="form-control hidden-md-down"
placeholder="I'm looking for">
<div class="input-group-addon top-search-addon"><i class="fa fa-search fa-search-white"></i></div>
</div>
</div>
</div>
<div class="row">
<div id="carouselExampleControls" class="carousel slide" data-ride="carousel">
<div class="carousel-inner" role="listbox">
<div class="carousel-item active">
<img class="d-block img-fluid" src="https://dummyimage.com/1290x672/ccc/000" alt="First slide">
<!--<div class="carousel-caption d-none d-md-block">
<h3>...</h3>
<p>...</p>
</div>-->
</div>
<div class="carousel-item">
<img class="d-block img-fluid" src="https://dummyimage.com/1290x672/ccc/000" alt="Second slide">
</div>
<div class="carousel-item">
<img class="d-block img-fluid" src="https://dummyimage.com/1290x672/ccc/000" alt="Third slide">
</div>
</div>
<a class="carousel-control-prev" href="#carouselExampleControls" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleControls" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
</div>
</body>
</html>屏幕截图如下。
签入Galaxy s5
通过调整屏幕大小进行检查
小智 12
将视口meta添加到您的head标签
<meta name="viewport" content="width=device-width, initial-scale=1.0">
视口
视口是用户在网页上的可见区域。
视口随设备而异，并且在移动电话上会比在计算机屏幕上小。
在平板电脑和手机之前，网页仅设计用于计算机屏幕，并且网页具有静态设计和固定大小是很常见的。
然后，当我们开始使用平板电脑和手机上网时，固定大小的网页太大了，无法容纳视口。要解决此问题，这些设备上的浏览器会按比例缩小整个网页以适合屏幕大小。
使用chrome dev工具的响应式设计。但这不起作用
- CNTRL + F5（强制刷新网页），然后进行检查。
小智 5
您可能需要将视口元添加到您的头上。
<meta name="viewport" content="width=device-width, initial-scale=1">