<form name="form">
    <input type="password" name="password" ng-model="password" required placeholder="請輸入密碼">
    <input type="password" name="passwordConfirm" ng-model="passwordConfirm" equal-to="password" placeholder="請再次輸入密碼">
    <span ng-show="form.passwordConfirm.$error.equalTo">兩次密碼不一致</span>
  </form>

angular.module("Valid",[])

.directive("equalTo", function () {
  return {
    require: "ngModel",
    link: function (scope, ele, attrs, ctrl) {

      console.log(scope);//打印當前作用域
      console.log(attrs);//打印當前標簽屬性列表
      console.log(ctrl);//打印當前ctrl

      var target = attrs["equalTo"];//獲取自定義指令屬性鍵值

      if (target) {//判斷鍵是否存在
        scope.$watch(target, function () {//存在啟動監(jiān)聽其值
          ctrl.$validate()//每次改變手動調(diào)用驗證
        }) 

        // 獲取當前模型控制器的父控制器FormController
        var targetCtrl = ctrl.$$parentForm[target];//獲取指定模型控制器
        console.log(targetCtrl)

        ctrl.$validators.equalTo = function (modelValue, viewVale) {//自定義驗證器內(nèi)容
          
          var targetValue = targetCtrl.$viewValue;//獲取password的輸入值

          return targetValue == viewVale;//是否等于passwordConfirm的值
        }

        ctrl.$formatters.push(function (value) {
          console.log("正在進行數(shù)據(jù)格式化的值:",value)
          return value;
        })

        ctrl.$parsers.push(function (value) {
          console.log("正在進行數(shù)據(jù)轉(zhuǎn)換的值:",value)
          return value;
        })
      }
    }
  }
})