AngularJS is an MV* framework, best suited for developing client-side single-page applications. It is not a functional library, but a framework for developing dynamic web pages. It focuses on extending the functionality of HTML, providing dynamic data binding, and it can work well with other frameworks (such as JQuery, etc.).
<body ng-app="myNoteApp">
<html>
<div ng-controller="myNoteCtrl">
<p><textarea ng-model="message" cols="40" rows="10" maxlength="100"></textarea></p>
<p>100/<span ng-bind="left()"></span></p>
</div>
</html>
<script type="text/javascript">
var app=angular.module("myNoteApp",[]);
app.controller("myNoteCtrl",function($scope){
$scope.message = "";
//显示变更数量
$scope.left = function() {return 100 - $scope.message.length;};
//清除文本框
$scope.clear = function() {$scope.message = "";};
//执行保存操作
$scope.save = function() {alert("Note Saved");};
});
</script>
</body>Remarks:
If there are multiple "textarea" in the same form, you can control it by defining multiple "ng-model"
If you operate different "textarea" in different forms, you can control it by defining multiple "ng-controllers"
But no matter what the situation, if it is in the same file, it is best to use only one "ng-app" in the same body
Additional: Usage of