ngClass 不更新类 [英] ngClass not updating the class
问题描述
我正在使用 angularJS 和 bootstrap 来设计我的应用程序的导航.我定义了一个主控制器,在主控制器内部我使用 ng-view 属性调用不同的页面视图,然后这些单独的视图有自己的控制器.
I am using angularJS with bootstrap to design a navigation on my application. I have defined a main controller and inside the main controller I call different page views using the ng-view attribute and then these individual views have their own controllers.
我正在使用 ng-class 属性将活动类添加到我的链接,但是,它不起作用.该表达式的计算结果为 true 或 false,但 ng-class 不会更新元素上的 class="active".
I am using the ng-class attribute to add the active class to my links, however, it is not working. The expression evaluates to true or false but the ng-class does not updates the class="active" on the elements.
在我的主页上,我有以下代码 -
On my home page I have the following code -
<section ng-controller="dashBoardCtrl" class="container">
<section class="row">
<h1>DME DashBoard | <small>WFM HeadCount</small> </h1>
</section>
<section class="row">
<ul class="nav nav-tabs">
<li role="presentation" ng-class="{active: {{path=='/'}}}"><a ng-href="#/">Home</a></li>
<li role="presentation" ng-class="{active: {{path=='/login'}}}"><a ng-href="#/login">Login</a></li>
</ul>
</section>
<section ng-view></section>
</section>
这是在应用程序上配置路由的方式 -
This is how the routes are configured on the app -
dmeDash.config(['$routeProvider', function ($routeProvider) {
$routeProvider
.when('/', {
templateUrl: '/views/home.html',
controller: 'homePageCtrl'
})
.when('/login', {
templateUrl: '/views/login.html',
controller: 'loginCtrl'
})
.otherwise({
redirectTo: '/'
});
}]);
dashBoardCtrl 有以下代码 -
The dashBoardCtrl have the following code -
dmeDashControllers.controller('dashBoardCtrl', ['$scope','$location', function($scope, $location) {
$scope.path = $location.$$path;
$scope.$watch('path',function(n,o) {
})
}]);
主页控制器有以下代码 -
Home Page Controller has the following code -
dmeDashControllers.controller('homePageCtrl', ['$scope','$location', function($scope, $location) {
$scope.$parent.path = $location.$$path;
}]);
登录页面控制器有如下代码-
The log in page controller has the following code -
dmeDashControllers.controller('loginCtrl', ['$scope','$location', function($scope, $location) {
$scope.$parent.path = $location.$$path;
}]);
当我从主页单击到登录页面时,活动类不会从主页链接中删除,也不会应用于登录页面,但是,当我在 firebug 中查看代码时,当页面变化.
When I click from Home page to Login page the active class is not removed from home page link and not applied to the login page as well, however, when I view the code in firebug the expressions evaluates to true or false when the page changes.
当我刷新单个页面时,ng-class 可以正常工作,但在使用超链接时却无法正常工作,请提出建议.
When I refresh on individual pages the ng-class works correctly but not when using the hyperlinks, please suggest.
推荐答案
模板上的语法错误.应该是:
The syntax is wrong on the template. It should be:
<li role="presentation" ng-class="{'active': path==='/'}"><a ng-href="#/">Home</a></li>
作为样式指南,请尝试使用 ===
而不是简单的 ==
因为 类型强制.或者再次测试真假
And as style guide try using the ===
instead of the simple ==
because of type coercion. Or test agains truthy or falsy
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