AngularJS实现输入框字数限制提醒功能
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2022-06-11 19:56:23
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本文主要介绍了AngularJS实现的输入框字数限制提醒功能,涉及AngularJS事件监听与元素属性动态操作相关实现技巧,需要的朋友可以参考下,希望能帮助到大家。
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title>www.jb51.net AngularJS字数提示</title> </head> <style> *{ margin:0; padding:0; } input,button,textarea,select{ outline:none; } textarea{ resize:none; } .content{ width:350px; height:150px; font-size:18px; text-indent:40px; overflow-y: hidden; overflow-x: hidden; } .content:hover{ border:1px solid #00ffff; cursor:pointer; } .top{ vertical-align:top; } .fontColor { color:#eee; } .tableT td{ margin-right:20px; } </style> <body ng-app="myApp" ng-controller="myControl"> <table class="tableT"> <tr> <td class="top">退货说明 :</td> <td><textarea id="sayId" class="content" ng-model="say" ng-keyup="changeText()"></textarea></td> </tr> <tr> <td></td> <td class="fontColor">你还可以输入{{textLength}}字</td> </tr> </table> </body> <script type="text/javascript" src="../js/jquery-1.8.3.js"></script> <script type="text/javascript" src="../js/angular.min.js"></script> <script type="text/javascript"> var app = angular.module('myApp',[]); app.controller('myControl',function($scope){ $scope.textLength = 10; $scope.changeText = function(){ var length = $("#sayId").val().length; //使用$scope.say.length的时候,输入空格的时候没有计算空格长度。 console.log(length); $scope.textLength = 10 - length; if($scope.textLength<=0){ $scope.textLength = 0; $("#sayId").val($scope.say.slice(0,10)); } } }); </script> </html>
运行效果:
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