angular.js - angularjs中怎么验证多选框至少选择一个?

Question

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angularjs里面提供基础的表单验证，比如ng-minlength之类的属性，然后用form.inputname.$valid就可以进行判断是否验证通过

但是像checkbox这种多选框怎么验证啊？要验证至少选中一个，有没有内置的，感觉这种应该不用写很复杂吧？

Answer 1

I came up with the method myself, see the blog: angularjs form verification checkbox

Answer 2

html<input type="checkbox" ng-model="form.cb1" ng-required="form.cb1 || form.cb2 || form.cb3">
<input type="checkbox" ng-model="form.cb2" ng-required="form.cb1 || form.cb2 || form.cb3">
<input type="checkbox" ng-model="form.cb3" ng-required="form.cb1 || form.cb2 || form.cb3">

If the judgment expression of

ngRequired is too long, just bind a function to return boolean.