Angularjs 通过directive实现验证两次输入是否一致的功能

"use strict";

/**
* Created by jerry_yang on 2015/11/27.
* user defined match check directive
*/
angular.module('bet.match', [])
.directive('matchCheck', matchCheck);

function matchCheck() {
return {
require: 'ngModel',
link: function (scope, elem, attrs, ctrl) {
var matchCheck = attrs.matchCheck;
var param = matchCheck.split('|');
var inputCtr = '#' + param[0];
elem.bind(inputCtr).on('keyup', function () {
scope.$apply(function () {
var v = elem.val() === $(inputCtr).val();
scope.form[param[1]].$setValidity('match', v);
});
});
}
}
}