angular 基于ng-messages的表单验证实例

最近在学习angular，那么今天也算个学习笔记吧！html<divclass="form-group"ng-class="{'has-error':myFo

最近在学习angular，那么今天也算个学习笔记吧！

html

 <div class="form-group" ng-class="{'has-error': myForm.myName.$touched && myForm.myName.$invalid}">
 <label class="col-xs-2 control-label">name</label>
 <div class="col-xs-6">
 <input type="text" class="form-control" name="myName" ng-model="formData.username"
 placeholder="2-10个中英文字符，aaa会重名，必填"
 name-check minlength="2" maxlength="10" required>
 </div>
 <div class="col-xs-4 form-control-static text-danger" ng-messages="myForm.myName.$error"
 ng-messages-include="demos/form/error.html" ng-show="myForm.myName.$touched">
 </div>
</div>

ng-messages="myForm.myName.$error" 给出错误类型(required, char, exist, minlength)

error.html

<span ng-message="required">必填</span>
<span ng-message="char">非法字符</span>
<span ng-message="exist">名称已存在</span>
<span ng-message="minlength">太短了</span>

directive name-check 利用ngModel 的$validators,& $asyncValidators 添加自定义验证

app.directive('nameCheck', nameCheck);

nameCheck.$inject = ['HttpService', '$q'];

function nameCheck(HttpService, $q){

 var NAME_REG = /^[a-zA-Z\u4e00-\u9fa5]+$/;

 return {
 restrict: 'A',
 require: 'ngModel',
 link:function($scope,element,attrs,ctrl){

 ctrl.$validators.char = function(modelValue, viewValue) {
 var value = modelValue || viewValue;
 if(!NAME_REG.test(value)){
 return false;
 }
 return true;
 };
 ctrl.$asyncValidators.exist = function(modelValue, viewValue){
 var value = modelValue || viewValue;
 var deferred = $q.defer();
 HttpService.get('api/users/' + value).then(function(res) {
 if(res.isExist){
 deferred.reject(false);

 }
 deferred.resolve(true);
 })

 return deferred.promise;
 }
 }
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。