AngularJS表单验证

AngularJS表单验证

1. 必填项验证
   某个表单输入是否已填写，只要在输入字段元素上添加HTML5标记required即可：
   <input type="text" required />

2. 最小长度
   验证表单输入的文本长度是否大于某个最小值，在输入字段上使用指令ng-minleng= “{number}”：
   <input type="text" ng-minlength="5" />

3. 最大长度
   验证表单输入的文本长度是否小于或等于某个最大值，在输入字段上使用指令ng-maxlength=”{number}”：
   <input type="text" ng-maxlength="20" />

4. 模式匹配
   使用ng-pattern=”/PATTERN/”来确保输入能够匹配指定的正则表达式：
   <input type="text" ng-pattern="/[a-zA-Z]/" />

5. 电子邮件
   验证输入内容是否是电子邮件，只要像下面这样将input的类型设置为email即可：
   <input type="email" name="email" ng-model="user.email" />

6. 数字
   验证输入内容是否是数字，将input的类型设置为number：
   <input type="number" name="age" ng-model="user.age" />

7. URL
   验证输入内容是否是URL，将input的类型设置为 url：
   <input type="url" name="homepage" ng-model="user.facebook_url" />

代码测试：

<div class="col-md-6">        <form role="form" class="form-horizontal">            <div class="form-group">                <div class="col-md-4">                    <label for="name">1.必填项</label>                </div>                <div class="col-md-8">                    <input class="form-control" id="name" type="text" required ng-model='user.name' />                </div>            </div>            <div class="form-group">                <div class="col-md-4">                    <label for="minlength">2.最小长度=5</label>                </div>                <div class="col-md-8">                    <input type="text" id="minlength" ng-minlength="5" ng-model="user.minlength" class="form-control" />                </div>            </div>            <div class="form-group">                <div class="col-md-4">                    <label for="minlength">3.最大长度=20</label>　　　　　　　　　　</div>                <div class="col-md-8">                    <input type="text" ng-model="user.maxlength" ng-maxlength="20" class="form-control" />                </div>            </div>            <div class="form-group">                <div class="col-md-4">                    <label for="minlength">4. 模式匹配</label>               </div>                <div class="col-md-8">                 <input type="text" id="minlength" ng-model="user.pattern" ng-pattern="/^[a-zA-Z]*\d$/" class="form-control" />                </div>            </div>            <div class="form-group">                <div class="col-md-4">                    <label for="email">5. 电子邮件</label>　　　　　　　　　　</div>                <div class="col-md-8">                    <input type="email" id="email" name="email" ng-model="user.email" class="form-control" />                </div>            </div>            <div class="form-group">                <div class="col-md-4">                    <label for="age">6. 数字</label>　　　　　　　　　　</div>                <div class="col-md-8">                    <input type="number" id="age" name="age" ng-model="user.age" class="form-control" />                </div>            </div>            <div class="form-group">                <div class="col-md-4">                    <label for="url"> 7. URL</label>　　　　　　　　　　</div>                <div class="col-md-8">                    <input type="url" id="url" name="homepage" ng-model="user.url" class="form-control" />                </div>            </div>            <div class="form-group text-center">                <input class="btn btn-primary btn-lg" type="submit" value="提交" />            </div>        </form>           </div>    <div class="col-md-12">        1.必填项:{{user.name}}<br>        2.最小长度=5:{{user.minlength}}<br>        3.最大长度=20:{{user.maxlength}}<br>        4.模式匹配:{{user.pattern}}<br>        5.电子邮件:{{user.email}}<br>        6.数字:{{user.age}}<br>        7.URL:{{user.url}}<br>    </div>

验证

1. 未修改过的表单
   布尔值属性，表示用户是否修改了表单。如果为ture，表示没有修改过；false表示修改过：
   formName.inputFieldName.$pristine;

2. 修改的表单
   布尔型属性，当且仅当用户实际已经修改的表单。不管表单是否通过验证：
   formName.inputFieldName.$dirty

3. 经过验证的表单
   布尔型属性，它指示表单是否通过验证。如果表单当前通过验证，他将为true：
   formName.inputFieldName.$valid

4. 未通过验证的表单
   formName.inputFieldName.$invalid

.ng-valid         {  }.ng-invalid     {  }.ng-pristine     {  }.ng-dirty         {  }/* really specific css rules applied by angular */.ng-invalid-required         {  }.ng-invalid-minlength         {  }.ng-valid-max-length         {  }

代码片段示例：

<!DOCTYPE html><html ng-app="myTest">    <head>        <meta name="viewport" content="width=device-width" />        <title>Index</title>        <link href="~/Content/css/bootstrap.min.css" rel="stylesheet" />        <script src="~/Javascript/angular.min.js"> </script>        <style type="text/css">            body { padding-top: 30px; }        </style>    </head>    <body  ng-Controller="MyController">        <div class="col-md-6">            <form role="form" name="myForm" ng-submit="submitForm(myForm.$valid)" class="form-horizontal" novalidate>                <div class="form-group  has-feedback">                    <div class="col-md-4">                        <label for="name">1.必填项</label>                    </div>                    <div class="col-md-8">                        <input class="form-control" id="name" name="name" type="text" required ng-model='user.name' />                        <span class="glyphicon glyphicon-ok form-control-feedback"                              ng-show="myForm.name.$dirty && myForm.name.$valid"></span>                    </div>                </div>                <div class="form-group  has-feedback">                    <div class="col-md-4">                        <label for="minlength">2.最小长度=5</label>                    </div>                    <div class="col-md-8">                        <input type="text" id="minlength" name="minlength" ng-minlength="5" ng-model="user.minlength" class="form-control" />                        <span class="glyphicon glyphicon-ok form-control-feedback"                              ng-show="myForm.minlength.$dirty && myForm.minlength.$valid"></span>                    </div>                </div>                <div class="form-group  has-feedback">                    <div class="col-md-4">                        <label for="maxlength">3.最大长度=20</label>                    </div>                    <div class="col-md-8">                        <input type="text" id="maxlength" name="maxlength" ng-model="user.maxlength" ng-maxlength="20" class="form-control" />                        <span class="glyphicon glyphicon-ok form-control-feedback"                              ng-show="myForm.maxlength.$dirty && myForm.maxlength.$valid"></span>                    </div>                </div>                <div class="form-group  has-feedback">                    <div class="col-md-4">                        <label for="pattern">4. 模式匹配</label>                    </div>                    <div class="col-md-8">                        <input type="text" id="pattern" name="pattern" ng-model="user.pattern" ng-pattern="/^[a-zA-Z]*\d$/" class="form-control" />                        <span class="glyphicon glyphicon-ok form-control-feedback"                              ng-show="myForm.pattern.$dirty && myForm.pattern.$valid"></span>                    </div>                </div>                <div class="form-group  has-feedback">                    <div class="col-md-4">                        <label for="email">5. 电子邮件</label>                    </div>                    <div class="col-md-8">                        <input type="email" id="email" name="email" ng-model="user.email" class="form-control" />                        <span class="glyphicon glyphicon-ok form-control-feedback"                              ng-show="myForm.email.$dirty && myForm.email.$valid"></span>                    </div>                </div>                <div class="form-group  has-feedback">                    <div class="col-md-4">                        <label for="age">6. 数字</label>                    </div>                    <div class="col-md-8">                        <input type="number" id="age" name="age" ng-model="user.age" class="form-control" />                        <span class="glyphicon glyphicon-ok form-control-feedback"                              ng-show="myForm.age.$dirty && myForm.age.$valid"></span>                    </div>                </div>                <div class="form-group  has-feedback">                    <div class="col-md-4">                        <label for="url"> 7. URL</label>                    </div>                    <div class="col-md-8">                        <input type="url" id="url" name="url" ng-model="user.url" class="form-control" />                        <span class="glyphicon glyphicon-ok form-control-feedback"                              ng-show="myForm.url.$dirty && myForm.url.$valid"></span>                    </div>                </div>                <div class="form-group  text-center">                    <input class="btn btn-primary btn-lg" ng-disabled="myForm.$invalid" type="submit" value="提交" />                </div>            </form>               </div>        <div class="col-md-12">            1.必填项:{{user.name}}&nbsp;&nbsp;            $pristine 【没修改】：{{myForm.name.$pristine }}&nbsp;&nbsp;            $dirty【修改过】：{{myForm.name.$dirty}}&nbsp;&nbsp;            $invalid【验证失败】：{{myForm.name.$invalid}}&nbsp;&nbsp;            $invalid【验证成功】：{{myForm.name.$valid}}&nbsp;&nbsp;            required：{{myForm.name.$error.required}}&nbsp;&nbsp;            <br>            2.最小长度=5:{{user.minlength}}            $pristine 【没修改】：{{myForm.minlength.$pristine }}&nbsp;&nbsp;            $dirty【修改过】：{{myForm.minlength.$dirty}}&nbsp;&nbsp;            $invalid【验证失败】：{{myForm.minlength.$invalid}}&nbsp;&nbsp;            $invalid【验证成功】：{{myForm.minlength.$valid}}&nbsp;&nbsp;            $error【错误详情】：{{myForm.minlength.$error}}&nbsp;&nbsp;<br>            3.最大长度=20:{{user.maxlength}}            $pristine 【没修改】：{{myForm.maxlength.$pristine }}&nbsp;&nbsp;            $dirty【修改过】：{{myForm.maxlength.$dirty}}&nbsp;&nbsp;            $invalid【验证失败】：{{myForm.maxlength.$invalid}}&nbsp;&nbsp;            $invalid【验证成功】：{{myForm.maxlength.$valid}}&nbsp;&nbsp;            $error【错误详情】：{{myForm.maxlength.$error}}&nbsp;&nbsp;<br>            4.模式匹配:{{user.pattern}}            $pristine 【没修改】：{{myForm.pattern.$pristine }}&nbsp;&nbsp;            $dirty【修改过】：{{myForm.pattern.$dirty}}&nbsp;&nbsp;            $invalid【验证失败】：{{myForm.pattern.$invalid}}&nbsp;&nbsp;            $invalid【验证成功】：{{myForm.pattern.$valid}}&nbsp;&nbsp;            $error【错误详情】：{{myForm.pattern.$error}}&nbsp;&nbsp;<br>            5.电子邮件:{{user.email}}            $pristine 【没修改】：{{myForm.email.$pristine }}&nbsp;&nbsp;            $dirty【修改过】：{{myForm.email.$dirty}}&nbsp;&nbsp;            $invalid【验证失败】：{{myForm.email.$invalid}}&nbsp;&nbsp;            $invalid【验证成功】：{{myForm.email.$valid}}&nbsp;&nbsp;            $error【错误详情】：{{myForm.email.$error}}&nbsp;&nbsp;<br>            6.数字:{{user.age}}            $pristine 【没修改】：{{myForm.age.$pristine }}&nbsp;&nbsp;            $dirty【修改过】：{{myForm.age.$dirty}}&nbsp;&nbsp;            $invalid【验证失败】：{{myForm.age.$invalid}}&nbsp;&nbsp;            $invalid【验证成功】：{{myForm.age.$valid}}&nbsp;&nbsp;            $error【错误详情】：{{myForm.age.$error}}&nbsp;&nbsp;<br>            7.URL:{{user.url}}            $pristine 【没修改】：{{myForm.url.$pristine }}&nbsp;&nbsp;            $dirty【修改过】：{{myForm.url.$dirty}}&nbsp;&nbsp;            $invalid【验证失败】：{{myForm.url.$invalid}}&nbsp;&nbsp;            $invalid【验证成功】：{{myForm.url.$valid}}&nbsp;&nbsp;            $error【错误详情】：{{myForm.url.$error}}&nbsp;&nbsp;<br>        </div>    </body></html><script type="text/javascript">    angular.module('myTest', [])        .controller('myController', function($scope) {            $scope.submitForm = function(isValid) {                if (!isValid) {                    alert('验证失败');                }            };        }        );</script>