angular 基于ng-messages的表单验证实例
编程学习 2021-07-04 18:32www.dzhlxh.cn编程入门
本篇文章主要介绍了angular 基于ng-messages的表单验证实例，长沙网络推广觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随长沙网络推广过来看看吧
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狼蚁SEO。
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