AngularJS 啟程三
阿新 • • 發佈：2018-05-21
sed title 初始化 del scrip AR return 技術分享 row 
<!DOCTYPE html> <html lang="zh_CN"> <head> <title>字數小例子</title> </head> <body ng-app="noCntAPP"> <div ng-controller="noCntCtrl"> <h2>我的筆記</h2> <textarea cols="30" rows="10" ng-model="txtArea"></textarea> <剩余字數小例子p><button>讀取</button> <button>提交</button> <button>撤銷</button> <p>剩余字數: {{getCount()}}</p> </p> <div> <script type="text/javascript" src="./angular.js"></script> <script type="text/javascript"> angular.module(‘noCntAPP‘,[]) .controller(‘noCntCtrl‘,[‘$scope‘,function($scope){ $scope.txtArea=‘‘; // 初始化文本區域值為空串 $scope.getCount=function(){ return 100 - $scope.txtArea.length; } }]); </script> </body> </html>
<!DOCTYPE html> <html lang="zh_CN"> <head> <title>字數小例子</title> </head> <body ng-app="noCntAPP"> <div ng-controller="noCntCtrl"> <h2>我的筆記</h2> <textarea cols="30" rows="10" ng-model="txtArea"></textarea> <p><button>讀取</button> <button>提交</button> <button>撤銷</button> <p>剩余字數: {{getCount()}}</p> </p> <div> <script type="text/javascript" src="./angular.js"></script> <script type="text/javascript"> angular.module(‘noCntAPP‘,[]) .controller(‘noCntCtrl‘,[‘$scope‘,function($scope){ $scope.txtArea=‘‘; // 初始化文本區域值為空串 $scope.getCount=function(){ if($scope.txtArea.length>100){ $scope.txtArea = $scope.txtArea.slice(0,100); // 超過 100 截取前 0-99 個字符 } return 100 - $scope.txtArea.length; } }]); </script> </body> </html>改進一下加入字符串長度判斷
AngularJS 啟程三