AngularJS豐富了表單填寫(xiě)和驗(yàn)證。我們可以使用ngclick事件來(lái)處理click按鈕,并使用$dirty和$invalid標(biāo)志無(wú)縫地進(jìn)行驗(yàn)證。使用帶有表單聲明的novalidate可禁用任何特定于瀏覽器的驗(yàn)證。表單控件大量使用AngularJS事件。讓我們先看看這些事件。
AngularJS提供了與HTML控件關(guān)聯(lián)的多個(gè)事件。例如,ng-click指令通常與按鈕關(guān)聯(lián)。AngularJS支持以下事件-
ng-click
ng-dbl-click
ng-mousedown
ng-mouseup
ng-mouseenter
ng-mouseleave
ng-mousemove
ng-mouseover
ng-keydown
ng-keyup
ng-keypress
ng-change
使用按鈕的ng-click指令重置表單數(shù)據(jù)。
<input name = "firstname" type = "text" ng-model = "firstName" required> <input name = "lastname" type = "text" ng-model = "lastName" required> <input name = "email" type = "email" ng-model = "email" required> <button ng-click = "reset()">Reset</button> <script> function studentController($scope) { $scope.reset = function() { $scope.firstName = "Mahesh"; $scope.lastName = "Parashar"; $scope.email = "MaheshParashar@(cainiaoplus.com)"; } $scope.reset(); } </script>
以下內(nèi)容可用于跟蹤錯(cuò)誤。
$dirty
?說(shuō)明值已更改。
$invalid
?指出輸入的值無(wú)效。
$error
?說(shuō)明確切的錯(cuò)誤。
以下示例將展示所有上述指令。
<html> <head> <title>Angular JS Forms</title> <script src = "https://cdn.staticfile.org/angular.js/1.3.14/angular.min.js"></script> <style> table, th , td { border: 1px solid grey; border-collapse: collapse; padding: 5px; } table tr:nth-child(odd) { background-color: #f2f2f2; } table tr:nth-child(even) { background-color: #ffffff; } </style> </head> <body> <h2>AngularJS-表單示例</h2> <div ng-app = "mainApp" ng-controller = "studentController"> <form name = "studentForm" novalidate> <table border = "0"> <tr> <td>輸入名字:</td> <td><input name = "firstname" type = "text" ng-model = "firstName" required> <span style = "color:red" ng-show = "studentForm.firstname.$dirty && studentForm.firstname.$invalid"> <span ng-show = "studentForm.firstname.$error.required">必須填寫(xiě)名字.</span> </span> </td> </tr> <tr> <td>輸入姓氏: </td> <td><input name = "lastname" type = "text" ng-model = "lastName" required> <span style = "color:red" ng-show = "studentForm.lastname.$dirty && studentForm.lastname.$invalid"> <span ng-show = "studentForm.lastname.$error.required">必須填寫(xiě)姓氏.</span> </span> </td> </tr> <tr> <td>Email: </td><td><input name = "email" type = "email" ng-model = "email" length = "100" required> <span style = "color:red" ng-show = "studentForm.email.$dirty && studentForm.email.$invalid"> <span ng-show = "studentForm.email.$error.required">電子郵件為必填項(xiàng).</span> <span ng-show = "studentForm.email.$error.email">無(wú)效的郵件地址.</span> </span> </td> </tr> <tr> <td> <button ng-click = "reset()">Reset</button> </td> <td> <button ng-disabled = "studentForm.firstname.$dirty && studentForm.firstname.$invalid || studentForm.lastname.$dirty && studentForm.lastname.$invalid || studentForm.email.$dirty && studentForm.email.$invalid" ng-click="submit()">Submit</button> </td> </tr> </table> </form> </div> <script> var mainApp = angular.module("mainApp", []); mainApp.controller('studentController', function($scope) { $scope.reset = function() { $scope.firstName = "Sea"; $scope.lastName = "Gull"; $scope.email = "Seagull@(cainiaoplus.com)"; } $scope.reset(); }); </script> </body> </html>測(cè)試看看?/?
輸出結(jié)果
在網(wǎng)絡(luò)瀏覽器中打開(kāi)文件testAngularJS.htm并查看結(jié)果。