我使用简单的ng重复来生成国家列表。每个列表中都有一个隐藏的行/ div,可以展开和折叠。
我面临的问题是,在我将Angular引入我的应用程序之前,我手动硬编码元素的ID,例如:
<li data-show="#country1"> {{country.name}} has population of {{country.population}} <div id="country1"> <p>Expand/collapse content </div> </li> <li data-show="#country2"> {{country.name}} has population of {{country.population}} <div id="country2"> <p>Expand/collapse content </div> </li> <li data-show="#country3"> {{country.name}} has population of {{country.population}} <div id="country3"> <p>Expand/collapse content </div> </li> <li data-show="#country4"> {{country.name}} has population of {{country.population}} <div id="country4"> <p>Expand/collapse content </div> </li>
使用ng-repeat的新代码:
<li ng-repeat="country in countries" data-show="????"> {{country.name}} has population of {{country.population}} <div id="???"> <p>Expand/collapse content </div> </li>
我如何在我的ng重复中分配动态/增量ID?
您可以使用$ index
https://docs.angularjs.org/api/ng/directive/ngRepeat
<li ng-repeat="country in countries" data-show="????"> {{country.name}} has population of {{country.population}} <div id="country-{{$index}}"> <p>Expand/collapse content </div> </li>