Question

我正在使用最新版本的bootstrap。我自己尝试了各种各样的东西，之后我想我可能会在stackoverflow上找到一些东西。但善良并没有得到这个东西。我的意思是它是如何工作的？

这是我的代码。我不会在这里添加任何自定义样式，因为它们并没有真正起作用，反而造成了一些错误。

我也检查了这篇文章Bootstrap - How to slide nav bar from left instead from top我从那里尝试了所有的答案，但它对我没有用。

＆＃13;

<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">

    <nav class="navbar navbar-toggleable-md navbar-inverse fixed-top bg-inverse">
	<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
	<span class="navbar-toggler-icon"></span>
	</button>
	<a class="navbar-brand" href="">Roknil Style</a>
	<div class="collapse navbar-collapse" id="navbarCollapse">
		<ul class="navbar-nav mr-auto">
			<li class="nav-item active">
				<a class="nav-link" href="#">Home</a>
			</li>
			<li class="nav-item">
				<a class="nav-link" href="#">Link</a>
			</li>
			<li class="nav-item">
				<a class="nav-link" href="#">About</a>
			</li>
		</ul>
		<form class="form-inline mt-2 mt-md-0">
		<input class="form-control mr-sm-2" type="text" placeholder="Search">
		<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
		</form>
	  </div>
    </nav>

<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>

＆＃13;

Answer 1

您可以像这样覆盖navbar-collapse的转换样式......

Demo

@media (max-width: 768px) {
    .navbar-collapse {
        position: absolute;
        top: 54px;
        left: 0;
        padding-left: 15px;
        padding-right: 15px;
        padding-bottom: 15px;
        width: 100%;
    }
    .navbar-collapse.collapsing {
        height: auto;
        -webkit-transition: left 0.3s ease;
        -o-transition: left 0.3s ease;
        -moz-transition: left 0.3s ease;
        transition: left 0.3s ease;
        left: -100%;
    }
    .navbar-collapse.show {
        left: 0;
        -webkit-transition: left 0.3s ease-in;
        -o-transition: left 0.3s ease-in;
        -moz-transition: left 0.3s ease-in;
        transition: left 0.3s ease-in;
    }
}

Demo - slide from right
Demo - slide from left

Answer 2

上面的CSS替代功能可以正常工作。但是，您必须等待高度先转换-造成一些延迟。下面的代码解决了这个问题。

 @media (max-width: 768px) {
        .navbar-collapse {
            position: fixed;
            top: 0;
            left: 0;
            padding-left: 15px;
            padding-right: 15px;
            padding-bottom: 15px;
            width: 75%;
            height: 100%;
        }

        .navbar-collapse.collapsing {
            left: -75%;
            transition: height 0s ease;
        }

        .navbar-collapse.show {
            left: 0;
            transition: left 500ms ease-in-out;
        }

        .navbar-toggler.collapsed ~ .navbar-collapse {
            transition: left 500ms ease-in-out;
        }
    }

Bootstrap 4移动导航栏从左侧滑动

3 个答案: