问题描述
我有一个指令,它取代了选择
元素自定义输入控件。下面是它的一个简化版本:
I have a directive which replaces a select
element with a custom input control. Here's a simplified version of it:
angular.module('MyModule', []).directive('reflector', function($timeout) {
return {
require: 'ngModel',
link: function(scope, element, attrs, ngModel) {
element.insertAfter('<input type=text id="new-' + attrs.id + '" />');
element.hide()
}
};
});
我想这个自定义输入控件,以反映原来的选择元素,也就是的有效/无效状态添加NG-无效上课的时候基本元素是无效的。
I'd like this custom input control to reflect the valid/invalid state of the original select element, i.e. add the ng-invalid class when the base element is invalid.
有没有办法收看更改为 ngModel $无效
?我知道我可以做范围。$腕表(attrs.ngModel,...)
,但给我的模型数据,而不是表单元素的有效/无效状态..
Is there any way to watch for changes to ngModel.$invalid
? I know I can do scope.$watch(attrs.ngModel, ...)
, but that gives me the model data, not the form element's valid/invalid state..
推荐答案
您可以观看所有的属性从的:
You can watch all the attributes from the ngModelController:
$scope.$watch(function(){return ngModel.$invalid;},function(newVal,oldVal){ ...
和 ngModel
设置以下CSS类到元素:NG-有效,NG-无效,NG-脏,NG-质朴
And ngModel
sets the following css classes onto the element: ng-valid, ng-invalid, ng-dirty, ng-pristine.
这篇关于看在ngModel变化。美元的角度指令无效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!