AngularJS是一种流行的前端开发框架,它可以帮助开发人员构建动态的单页应用程序。在使用AngularJS操作Navbar Bootstrap 4的崩溃时,可以采取以下步骤:
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Logo</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" 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="#">Services</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact</a>
</li>
</ul>
</div>
</nav>
app.controller('NavbarController', function($scope) {
$scope.isActive = false;
$scope.toggleActive = function() {
$scope.isActive = !$scope.isActive;
};
});
<nav class="navbar navbar-expand-lg navbar-light bg-light" ng-controller="NavbarController">
<a class="navbar-brand" href="#">Logo</a>
<button class="navbar-toggler" type="button" ng-click="toggleActive()" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav" ng-class="{ 'show': isActive }">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" 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="#">Services</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact</a>
</li>
</ul>
</div>
</nav>
在上述代码中,通过ng-controller指令将控制器与导航栏关联起来。通过ng-click指令将toggleActive函数绑定到按钮的点击事件上。通过ng-class指令根据isActive变量的值来动态添加或移除CSS类,实现导航栏的展开和折叠效果。
这样,当点击导航栏的按钮时,就会触发toggleActive函数,从而改变isActive变量的值,导航栏的折叠状态也会相应改变。
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