<!DOCTYPE html>
<html> <head>
<meta charset="UTF-8">
<title>angular.isUndefined</title>
</head> <body ng-app="isUndefinedExample">
<h1>angular.isUndefined</h1>
<p>
<span>描述：</span><br />
<span>判断参数是否是一个Undefined</span>
</p>
<p>
<span>使用方法：</span><br />
<span>angular.isUndefined(value)</span>
</p>
<p>
<span>参数：</span><br />
<span>value：判断的值</span><br />
</p>
<p>
<span>返回值：</span><br />
<span>boolean</span>
</p>
<hr />
<div ng-controller="isUndefinedcon">
<div id="test">{{vals}}</div>
</div>
</body>
<script src="../../js/angular.1.3.0.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
angular.module('isUndefinedExample', []).controller('isUndefinedcon', function($scope) {
//var val = '';
var val;
console.log(angular.isUndefined(val))
$scope.vals = angular.isUndefined(val);
})
</script> </html>