我需要找到类ngAggregate的第一个元素，带有角度
我想在角度中找到等效物：
document.getElementsByClassName('ngAggregate')[0]; (which works)
但是，我不能使用它，因为我需要稍后进行一些绑定。
我试过了：
var aggregate = angular.element('.ngAggregate')[0];
但我很震惊地说，angular.element（＆＃39; .ngAggregate＆＃39;）未定义。
正确的写作方法是什么？
更新：
var aggregate = angular.element(document.getElementsByClassName('ngAggregate')[0]);
不会返回错误，但我希望得到＆＃34;聚合＆＃34;
console.log(aggregate.childNodes[1].innerHTML);
我得到了
Cannot read property '1' of undefined
这是完整的错误：
TypeError: Cannot read property '1' of undefined
at HTMLDocument.<anonymous> (http://localhost:8000/src/search/searchCtrl.js:377:49)
at j (http://localhost:8000/components/jquery/jquery-1.11.0.min.js:2:27136)
at Object.k.add [as done] (http://localhost:8000/components/jquery/jquery-1.11.0.min.js:2:27445)
at n.fn.ready (http://localhost:8000/components/jquery/jquery-1.11.0.min.js:2:29551)
at new <anonymous> (http://localhost:8000/src/search/searchCtrl.js:370:35)
at invoke (http://localhost:8000/components/angular/angular.js:3720:17)
at Object.instantiate (http://localhost:8000/components/angular/angular.js:3731:23)
at http://localhost:8000/components/angular/angular.js:6848:28
at updateView (http://localhost:8000/components/angular-ui-router/angular-ui-router.js:2286:30)
at http://localhost:8000/components/angular-ui-router/angular-ui-router.js:2234:9 <div ui-view="">