使用angular.js实现的剩余字数,angular.min.js下载地址/ajax/libs/angularjs/1.6.5/angular.min.js
1.leftletter.html
<!DOCTYPE html><html><head><meta charset="utf-8"></head><body ng-app="myNoteApp" ng-controller="myNoteCtrl"><h2>我的笔记</h2><textarea ng-model="message" cols="40" rows="10"></textarea><p><button ng-click="save()">保存</button><button ng-click="clear()">清除</button></p><p>剩余字数: <span ng-bind="left()"></span></p><script src="angular.min.js"></script><script src="myNoteCtrl.js"></script></body></html>
2.myNoteCtrl.js
var app = angular.module("myNoteApp", []); app.controller("myNoteCtrl", function($scope) {$scope.message = "";$scope.left = function() {return 100 - $scope.message.length;};$scope.clear = function() {$scope.message = "";};$scope.save = function() {alert("Note Saved");};});
