angular样例

<div ng-app="myApp3" ng-controller="textController">
	<p>
		我的笔记
	</p>
	<p>
		<textarea ng-model="message" cols="30" rows="10"></textarea>
	</p>
	<p>
		<button ng-click="save()">保存</button> <button ng-click="reset()">清除</button>
	</p>
	<p>
		剩余字数：<span ng-bind="left()">100</span>
	</p>
</div>

var app = angular.module('myApp3', []);

app.controller('textController', function($scope){
	$scope.message = '';
	$scope.save = function(){
		alert( $scope.message );
	}
	$scope.left = function(){
		return 100 - $scope.message.length;
	}
	$scope.reset = function(){
		$scope.message = '';
	}
})