angularjs - 获取元素兄弟的 *Angular* 方法是什么？

Question

使用AngularJS单击元素兄弟时获取元素兄弟的惯用方法是什么？

到目前为止，我有这个：

<div ng-controller="FooCtrl">
    <div ng-click="clicked()">One</div>
    <div ng-click="clicked()">Two</div>
    <div ng-click="clicked()">Three</div>
</div>

<script>
    function FooCtrl($scope){
        $scope.clicked = function()
        {
            console.log("Clicked", this, arguments);
        };
    }
</script>

这是一个 jQuery 实现作为具体示例：

<div id="foo">
    <div>One</div>
    <div>two</div>
    <div>three</div>
</div>

<script>
    $(function(){
        $('#foo div').on('click', function(){
            $(this).siblings('div').removeClass('clicked');
            $(this).addClass('clicked');
        });
    });
</script>

Answer 1

使用指令，因为您想遍历 DOM：

app.directive('sibs', function() {
    return {
        link: function(scope, element, attrs) {
            element.bind('click', function() {
                element.parent().children().removeClass('clicked');
                element.addClass('clicked');
            })
        },
    }
});

<div sibs>One</div>
<div sibs>Two</div>
<div sibs>Three</div>

请注意，jQuery 不是必需的。

fiddle

Answer 2

这是您提供的 jQuery 示例的 Angular 版本：

HTML：

<div ng-controller="FooCtrl">
    <div ng-click="selected.item='One'" 
    ng-class="{clicked:selected.item=='One'}">One</div>
    <div ng-click="selected.item='Two'" 
    ng-class="{clicked:selected.item=='Two'}">Two</div>
    <div ng-click="selected.item='Three'" 
    ng-class="{clicked:selected.item=='Three'}">Three</div>
</div>

JS：

function FooCtrl($scope, $rootScope) {   
    $scope.selected = {
        item:""
    }
}

注意：您不需要为此访问 DOM。但是，如果您仍然想要，那么您可以编写一个简单的指令。如下所示：

HTML：

<div ng-controller="FooCtrl">
    <div ng-click="clicked()" get-siblings>One</div>
    <div ng-click="clicked()" get-siblings>Two</div>
    <div ng-click="clicked()" get-siblings>Three</div>
</div>

JS：

yourApp.directive('getSiblings', function() {
   return {
      scope: true,
      link: function(scope,element,attrs){
         scope.clicked = function () {
            element.siblings('div').removeClass('clicked');
            element.addClass('clicked');
         }
      }
   }
});

fiddle

Answer 3

以下是专门使用 Angular 语法构建的指令（借用自 jqLit​​e）：

link: function(scope, iElement, iAttributes, controllers) {
    var parentChildren,
        mySiblings = [];

    // add a marker to this element to distinguish it from its siblings
    // this could be a lot more robust
    iElement.attr('rsFindMySiblings', 'anchor');

    // get my parent's children, it will include me!
    parentChildren = iElement.parent().children();

    // remove myself
    scope.siblings = [];
    for (var i=0; i < parentChildren.length; i++) {
       var child = angular.element(parentChildren[i]);
       var attr = child.attr('rsFindMySiblings');
       if (!attr) {
         scope.siblings.push({name: child[0].textContent});  
       }
    }
}

请注意，它使用控制器来存储结果。有关详细示例，请参阅此plunker