angular css类和样式

<div ng-controller="MenuController">
    <ul>
        <li class="menu-disabled-{{isDisabled}}" ng-click="DisabledIt()">Click</li>
        ...
    </ul>
</div>

.menu-disabled-true {
    color: gray;
}

function MenuController($scope) {
    $scope.isDisabled = false;

    $scope.disabledIt = function() {
        $scope.isDisabled = true;
    }
}