AngularJS表單和輸入驗證實例

更新時間：2016年11月02日 14:21:45 作者：A_山水子農(nóng)

本篇文章詳細(xì)的介紹了AngularJS表單和輸入驗證實例， AngularJS表單可以提供驗證功能。有需要的可以了解一下。

AngularJS 表單和控件可以提供驗證功能，并對用戶輸入的非法數(shù)據(jù)進(jìn)行警告。

注意：客戶端的驗證不能確保用戶輸入數(shù)據(jù)的安全，所以服務(wù)端的數(shù)據(jù)驗證也是必須的。

1、HTML 控件

以下 HTML input 元素被稱為 HTML 控件:input 元素、select 元素、button 元素、textarea 元素。

2、HTML 表單

AngularJS 表單是輸入控件的集合。HTML 表單通常與 HTML 控件同時存在。

<!DOCTYPE html> 
<html> 
<head> 
<meta charset="utf-8" /> 
<title>angularJs</title> 
<script src="js/angular.min.js" type="text/javascript" charset="utf-8"></script> 
</head> 
<body> 
<div ng-app="myApp" ng-controller="formCtrl"> 
 <form novalidate> 
  First Name:<br> 
  <input type="text" ng-model="user.firstName"><br> 
  Last Name:<br> 
  <input type="text" ng-model="user.lastName"> 
  <br><br> 
  <button ng-click="reset()">RESET</button> 
 </form> 
 <p>form = {{user }}</p> 
 <p>master = {{master}}</p> 
</div> 
<script> 
var app = angular.module('myApp', []); 
app.controller('formCtrl', function($scope) { 
  $scope.master = {firstName:"John", lastName:"Doe"}; 
  $scope.reset = function() { 
    $scope.user = angular.copy($scope.master); 
  }; 
  $scope.reset(); 
}); 
</script> 
</body> 
</html>

3、輸入驗證

AngularJS 表單和控件可以提供驗證功能，并對用戶輸入的非法數(shù)據(jù)進(jìn)行警告?？蛻舳说尿炞C不能確保用戶輸入數(shù)據(jù)的安全，所以服務(wù)端的數(shù)據(jù)驗證也是必須的。

<!DOCTYPE html> 
<html> 
<head> 
<meta charset="utf-8" /> 
<title>angularJs</title> 
<script src="js/angular.min.js" type="text/javascript" charset="utf-8"></script> 
</head> 
<body> 
<h2>驗證實例</h2> 
<form ng-app="myApp" ng-controller="validateCtrl" name="myForm" novalidate> 
<p>用戶名: 
<input type="text" name="user" ng-model="user" required> 
<span style="color:red" ng-show="myForm.user.$dirty && myForm.user.$invalid"> 
<span ng-show="myForm.user.$error.required">用戶名是必須的。</span> 
</span> 
</p> 
<p>郵  箱: 
<input type="email" name="email" ng-model="email" required> 
<span style="color:red" ng-show="myForm.email.$dirty && myForm.email.$invalid"> 
<span ng-show="myForm.email.$error.required">郵箱是必須的。</span> 
<span ng-show="myForm.email.$error.email">非法的郵箱地址。</span> 
</span> 
</p> 
<p> 
<input type="submit" 
ng-disabled="myForm.user.$dirty && myForm.user.$invalid ||  
myForm.email.$dirty && myForm.email.$invalid"> 
</p> 
</form> 
<script> 
var app = angular.module('myApp', []); 
app.controller('validateCtrl', function($scope) { 
  $scope.user = 'John Doe'; 
  $scope.email = 'john.doe@gmail.com'; 
}); 
</script> 
</body> 
</html>

AngularJS ng-model 指令用于綁定輸入元素到模型中。模型對象有兩個屬性： user 和 email。我們使用了 ng-show指令，color:red 在郵件是 $dirty 或 $invalid 才顯示。

沒用初始值的輸入驗證：注意ng-app=""，ng-app有值就必須連接到代碼模塊，利用angular.module 函數(shù)來創(chuàng)建模塊。

 <!DOCTYPE html> 
<html> 
<head> 
<meta charset="utf-8" /> 
<title>angularJs</title> 
<script src="js/angular.min.js" type="text/javascript" charset="utf-8"></script> 
</head> 
<body> 
<h2>驗證實例</h2> 
<form ng-app="" name="myForm" novalidate> 
<p>用戶名: 
<input type="text" name="user" ng-model="user" required> 
<span style="color:red" ng-show="myForm.user.$dirty && myForm.user.$invalid"> 
<span ng-show="myForm.user.$error.required">用戶名是必須的。</span> 
</span> 
</p> 
<p>郵  箱: 
<input type="email" name="email" ng-model="email" required> 
<span style="color:red" ng-show="myForm.email.$dirty && myForm.email.$invalid"> 
<span ng-show="myForm.email.$error.required">郵箱是必須的。</span> 
<span ng-show="myForm.email.$error.email">非法的郵箱地址。</span> 
</span> 
</p> 
<p> 
<input type="submit" 
ng-disabled="myForm.user.$dirty && myForm.user.$invalid ||  
myForm.email.$dirty && myForm.email.$invalid"> 
</p> 
</form> 
</body> 
</html>

4、ng-disabled實例

<!doctype html> 
<html ng-app="MyApp"> 
  <head> 
    <script src="js/angular.min.js"></script> 
  </head> 
  <body> 
    <div ng-controller="Controller"> 
      <form name="form" class="css-form" novalidate> 
        Name: 
        <input type="text" ng-model="user.name" name="uName" required /><br/> 
        E-mail: 
        <input type="email" ng-model="user.email" name="uEmail" required /><br/> 
        <div ng-show="form.uEmail.$dirty && form.uEmail.$invalid"> 
          Invalid: 
          <span ng-show="form.uEmail.$error.required">Tell us your email.</span> 
          <span ng-show="form.uEmail.$error.email">This is not a valid email.</span> 
        </div> 
        Gender:<br/> 
        <input type="radio" ng-model="user.gender" value="male" /> 
        male 
        <input type="radio" ng-model="user.gender" value="female" /> 
        female<br/> 
        <input type="checkbox" ng-model="user.agree" name="userAgree" required /> 
        I agree: 
        <input ng-show="user.agree" type="text" ng-model="user.agreeSign" required /> 
        <div ng-show="!user.agree || !user.agreeSign"> 
          Please agree and sign. 
        </div> 
        <br/> 
        <!--ng-disabled為true時禁止使用，ng-disabled實時監(jiān)控應(yīng)用程序--> 
        <button ng-click="reset()" ng-disabled="isUnchanged(user)"> 
          RESET 
        </button> 
        <button ng-click="update(user)" ng-disabled="form.$invalid || isUnchanged(user)"> 
          SAVE 
        </button> 
      </form> 
    </div> 
  <script type="text/javascript"> 
    var app=angular.module("MyApp",[]); 
    app.controller("Controller",function($scope){ 
      $scope.master = {}; 
      $scope.update=function(user){ 
        $scope.master=$scope.copy(user); 
      }; 
      $scope.reset=function(){ 
        $scope.user=angular.copy($scope.master); 
      }; 
      $scope.isUnchanged=function(user){ 
        //判斷user和$scope.master是否相等，相等返回true，否則返回false 
        return angular.equals(user,$scope.master); 
      }; 
      $scope.reset(); 
    }); 
  </script> 
  </body> 
</html>

5、ng-submit實例

<html ng-app='TestFormModule'> 
  <head> 
    <meta http-equiv="content-type" content="text/html; charset=utf-8" /> 
    <script src="js/angular.min.js"></script> 
  </head> 
  <body><!--ng-submit綁定表單提交事件--> 
    <form name="myForm" ng-submit="save()" ng-controller="TestFormModule"> 
       <input name="userName" type="text" ng-model="user.userName" required/> 
       <input name="password" type="password" ng-model="user.password" required/><br /> 
       <input type="submit" ng-disabled="myForm.$invalid"/> 
    </form> 
  </body> 
  <script type="text/javascript"> 
    var app=angular.module("TestFormModule",[]); 
    app.controller("TestFormModule",function($scope){ 
      $scope.user={ 
        userName:"山水子農(nóng)", 
        password:'' 
      }; 
      $scope.save=function(){ 
        console.log("保存數(shù)據(jù)中..."); 
      } 
    }); 
  </script> 
</html>

6、maxlength和minlength實例

<!DOCTYPE html> 
<html> 
  <head> 
    <meta charset="UTF-8"> 
    <script src="js/angular.js" type="text/javascript" charset="utf-8"></script> 
    <title>表單驗證</title> 
  </head> 
  <body ng-app="myApp" > 
  <div ng-controller="myCtrl"> 
  <form name="form"> 
   <label for="maxlength">Set a maxlength: </label> 
   <input type="number" ng-model="maxlength" id="maxlength" /><br> 
   <label for="minlength">Set a minlength: </label> 
   <input type="number" ng-model="minlength" id="minlength" /><br><hr> 
   <label for="input">This input is restricted by the current maxlength and minlength: </label><br> 
   <input type="text" ng-model="textmodel" id="text" name="text" ng-maxlength="maxlength" ng-minlength="minlength"/><br> 
   text input valid? = <code>{{form.text.$valid}}</code><br> 
   text model = <code>{{textmodel}}</code><br><hr> 
   <label for="input">This input is restricted by the current maxlength and minlength: </label><br> 
   <input type="number" ng-model="numbermodel" id="number" name="number" ng-maxlength="maxlength" ng-minlength="minlength"/><br> 
   number input valid? = <code>{{form.number.$valid}}</code><br> 
   number model = <code>{{numbermodel}}</code> 
  </form> 
  </div>   
  <script type="text/javascript"> 
    var app=angular.module("myApp",[]); 
    app.controller("myCtrl",function($scope){ 
      $scope.maxlength=8; 
      $scope.minlength=4; 
    }); 
  </script> 
  </body> 
</html>

7、ng-class實例

<!DOCTYPE html> 
<html> 
  <head> 
    <meta charset="UTF-8"> 
    <script src="js/angular.js" type="text/javascript" charset="utf-8"></script> 
    <title>表單驗證</title> 
    <style type="text/css"> 
    .deleted { 
     text-decoration: line-through; 
    } 
    .bold { 
     font-weight: bold; 
    } 
    .red { 
     color: red; 
    } 
    .error { 
     color: red; 
     background-color: yellow; 
    } 
    .base-class { 
     transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s; 
    } 
    .base-class.my-class { 
     color: red; 
     font-size:3em; 
    } 
    </style> 
  </head> 
  <body ng-app="myApp" > 
  <div ng-controller="myCtrl"> 
  <form name="form"> 
    <p ng-class="{deleted: deleted, bold: bold, 'error': error}">Map Syntax Example</p> 
    <label><input type="checkbox" ng-model="deleted">deleted (apply "deleted" class)</label><br> 
    <label><input type="checkbox" ng-model="bold">bold (apply "bold" class)</label><br> 
    <label><input type="checkbox" ng-model="error">error (apply "error" class)</label> 
    <hr> 
    <input id="setbtn" type="button" value="set" ng-click="myVar='my-class'"> 
    <input id="clearbtn" type="button" value="clear" ng-click="myVar=''"> 
    <br> 
    <span class="base-class" ng-class="myVar">Sample Text</span> 
  </form> 
  </div>   
  <script type="text/javascript"> 
    var app=angular.module("myApp",[]); 
    app.controller("myCtrl",function($scope){ 
    }); 
  </script> 
  </body> 
</html><strong> 
</strong>

8、ng-if實例

<!DOCTYPE html> 
<html> 
  <head> 
    <meta charset="UTF-8"> 
    <script src="js/angular.js" type="text/javascript" charset="utf-8"></script> 
    <title>表單驗證</title> 
    <style> 
    .animate-if { 
     width:400px; 
     border:2px solid yellowgreen; 
     border-radius: 10px; 
     padding:10px; 
     display: block; 
    }  
    </style> 
  </head> 
  <body ng-app="myApp" > 
  <div ng-controller="myCtrl"> 
  <form name="form"> 
    <label>Click me: <input type="checkbox" ng-model="checked" ng-init="checked=true" /></label><br/> 
    Show when checked: 
    <span ng-if="checked" class="animate-if"> 
    This is removed when the checkbox is unchecked. 
    </span> 
  </form> 
  </div>   
  <script type="text/javascript"> 
    var app=angular.module("myApp",[]); 
    app.controller("myCtrl",function($scope){ 
    }); 
  </script> 
  </body> 
</html>