AngularJS提供豐富填寫表單和驗(yàn)證。我們可以用ng-click來(lái)處理AngularJS點(diǎn)擊按鈕事件，然后使用 $dirty 和 $invalid標(biāo)志做驗(yàn)證的方式。使用novalidate表單聲明禁止任何瀏覽器特定的驗(yàn)證。表單控件使用了大量的角活動(dòng)。讓我們快速瀏覽一下有關(guān)事件先。

事件

AngularJS提供可與HTML控件相關(guān)聯(lián)的多個(gè)事件。例如ng-click通常與按鈕相關(guān)聯(lián)。以下是AngularJS支持的事件。

ng-click

ng-dbl-click

ng-mousedown

ng-mouseup

ng-mouseenter

ng-mouseleave

ng-mousemove

ng-mouseover

ng-keydown

ng-keyup

ng-keypress

ng-change

ng-click

使用點(diǎn)擊一個(gè)按鈕的指令，表單重置數(shù)據(jù)。

<input name="firstname" type="text" ng-model="firstName" required>
<input name="lastname" type="text" ng-model="lastName" required>
<input name="email" type="email" ng-model="email" required>
<button ng-click="reset()">Reset</button>
<script>
  function studentController($scope) { 
   $scope.reset = function(){
     $scope.firstName = "Mahesh";
     $scope.lastName = "Parashar";
     $scope.email = "MaheshParashar@yiibai.com";
 }  
  $scope.reset();
}
</script>

驗(yàn)證數(shù)據(jù)

可使用下面跟蹤誤差。

$dirty - 規(guī)定值已被改變。

$invalid- 該值的狀態(tài)是無(wú)效的。

$error- 指出確切的錯(cuò)誤。

例子

下面的例子將展示上述所有指令。

testAngularJS.html

<html>
<head>
<title>Angular JS Forms</title>
<style>
table, th , td {
 border: 1px solid grey;
 border-collapse: collapse;
 padding: 5px;
}
table tr:nth-child(odd) {
 background-color: #f2f2f2;
}
table tr:nth-child(even) {
 background-color: #ffffff;
}
</style>
</head>
<body>
<h2>AngularJS Sample Application</h2>
<div ng-app="" ng-controller="studentController">
<form name="studentForm" novalidate>
<table border="0">
<tr><td>Enter first name:</td><td><input name="firstname" type="text" ng-model="firstName" required>
  <span style="color:red" ng-show="studentForm.firstname.$dirty && studentForm.firstname.$invalid">
   <span ng-show="studentForm.firstname.$error.required">First Name is required.</span>
  </span>
</td></tr>
<tr><td>Enter last name: </td><td><input name="lastname" type="text" ng-model="lastName" required>
  <span style="color:red" ng-show="studentForm.lastname.$dirty && studentForm.lastname.$invalid">
   <span ng-show="studentForm.lastname.$error.required">Last Name is required.</span>
  </span>
</td></tr>
<tr><td>Email: </td><td><input name="email" type="email" ng-model="email" length="100" required>
<span style="color:red" ng-show="studentForm.email.$dirty && studentForm.email.$invalid">
   <span ng-show="studentForm.email.$error.required">Email is required.</span>
	 <span ng-show="studentForm.email.$error.email">Invalid email address.</span>
  </span>
</td></tr>
<tr><td><button ng-click="reset()">Reset</button></td><td><button 
	ng-disabled="studentForm.firstname.$dirty && studentForm.firstname.$invalid ||
			 studentForm.lastname.$dirty && studentForm.lastname.$invalid ||
			 studentForm.email.$dirty && studentForm.email.$invalid"
	ng-click="submit()">Submit</button></td></tr>
</table>
</form>
</div>
<script>
function studentController($scope) { 
  $scope.reset = function(){
		$scope.firstName = "Mahesh";
		$scope.lastName = "Parashar";
		$scope.email = "MaheshParashar@yiibai.com";
  }  
  $scope.reset();
}
</script>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script>
</body>
</html>

輸出

在Web瀏覽器打開textAngularJS.html?？吹浇Y(jié)果如下。