AngularJS提供豐富填寫表單和驗證。我們可以用ng-click來處理AngularJS點擊按鈕事件，然後使用 $dirty 和 $invalid標誌做驗證的方式。使用novalidate表單聲明禁止任何流覽器特定的驗證。表單控件使用了大量的角活動。讓我們快速流覽一下有關事件先。
事件
AngularJS提供可與HTML控件相關聯的多個事件。例如ng-click通常與按鈕相關聯。以下是AngularJS支持的事件。
-
ng-click
-
ng-dbl-click
-
ng-mousedown
-
ng-mouseup
-
ng-mouseenter
-
ng-mouseleave
-
ng-mousemove
-
ng-mouseover
-
ng-keydown
-
ng-keyup
-
ng-keypress
-
ng-change
ng-click
使用點擊一個按鈕的指令，表單重置數據。
<input name="firstname" type="text" ng-model="firstName" required>
<input name="lastname" type="text" ng-model="lastName" required>
<input name="email" type="email" ng-model="email" required>
<button ng-click="reset()">Reset</button>
<script>
function studentController($scope) {
$scope.reset = function(){
$scope.firstName = "Mahesh";
$scope.lastName = "Parashar";
$scope.email = "MaheshParashar@xuhuhu.com";
}
$scope.reset();
}
</script>
驗證數據
可使用下麵跟蹤誤差。
-
$dirty - 規定值已被改變。
-
$invalid- 該值的狀態是無效的。
-
$error- 指出確切的錯誤。
例子
下麵的例子將展示上述所有指令。
testAngularJS.html
<html>
<head>
<title>Angular JS Forms</title>
<style>
table, th , td {
border: 1px solid grey;
border-collapse: collapse;
padding: 5px;
}
table tr:nth-child(odd) {
background-color: #f2f2f2;
}
table tr:nth-child(even) {
background-color: #ffffff;
}
</style>
</head>
<body>
<h2>AngularJS Sample Application</h2>
<div ng-app="" ng-controller="studentController">
<form name="studentForm" novalidate>
<table border="0">
<tr><td>Enter first name:</td><td><input name="firstname" type="text" ng-model="firstName" required>
<span style="color:red" ng-show="studentForm.firstname.$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@xuhuhu.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流覽器打開textAngularJS.html。看到結果如下。
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