<div ng-messages="alarmDelayForm.alarmRuleName.$error" role="alert"><div ng-message="required" translate="message.required">This field is required</div><div ng-if="checkUniqueName"><span translate="message.nameExists">This name is already exists</span></div></div>
可以在<ng-messages>里面嵌入一个<div ng-if="expression">
angularjs的验证信息的写法
原文地址：https://www.cnblogs.com/1540340840qls/p/8259178.html