浅析angular.identity
如果您发现本文排版有问题，可以先点击下面的链接切换至老版进行查看！！！
浅析angular.identity
function transformer(transformationFn, value) {
return (transformationFn || angular.identity)(value);
};
var app = angular.module('myApp', []);
app.controller('myCtrl', ['$scope', function($scope) {
$scope.result = "";
$scope.input = "";
$scope.double = function(n) {
return n * 2;
}
$scope.answer = function(fn, val) {
return (fn || angular.identity)(val);
}
$scope.cal = function() {
$scope.result = $scope.answer($scope.double, $scope.input);
}
}]);
<!DOCTYPE html>
<html lang="en" ng-app="myApp">
<head>
<meta charset="UTF-8">
<script src="../js/Angular1.5.5.js" ></script>
<script src="../js/angular-sanitize.js" ></script>
<script src="index.js" ></script>
<title>angular.identity</title>
</head>
<body>
<div ng-controller="myCtrl">
<input type="text" id="btn" ng-model="input" value="answer" ng-change="cal()"/> * 2 = {{result}}
</div>
</body>
</html>
- 分类：
- Web前端
更新时间：
