NG-show当数组的长度为零 [英] ng-show when array length is zero

问题描述

我是AngularJS初学者。我想显示无标签找到在过滤过程中的帮助下 NG-节目

I am a beginner for AngularJS. I am trying to display "No Tag Found" during filter process with the help of "ng-show".

JS：

function simpleController($scope)
{
$scope.tags = ['HTML','CSS','Jquery','Bootstrap','AngularJS'];
}

HTML：

<div ng-controller="simpleController">
<input  class="txt" type="text" ng-model="nameText" /> 
<div>
 <ul>
  <li ng-repeat="myKeys in tags| filter:nameText">{{myKeys}}</li>
 </ul>
<div ng-show="!tags.length">No Tag Found</div>
</div>
</div>

当我键入比阵列的山谷以外的任何值，我没能获得无标签找到使用上述code。请帮忙。谢谢你。

When I type any value other than array vales, I am not able to get "No Tag Found" using the above code. Please help. Thanks.

推荐答案

如果你在你的 NG-重复，则必须采用同样的过滤器过滤你 NG-节目。如果你不这样做， NG-节目总是引用完整数组：

If you're filtering in your ng-repeat, you must apply the same filter for you ng-show. If you don't, the ng-show will always refer to the full array :

<div ng-show="!(tags| filter:nameText).length">No Tag Found</div>

工作小提琴： http://jsfiddle.net/HB7LU/3149/

这篇关于NG-show当数组的长度为零的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！