AngularJS表单详解及示例代码
内容摘要
AngularJS提供丰富填写表单和验证。我们可以用ng-click来处理AngularJS点击按钮事件,然后使用 $dirty 和 $invalid标志做验证的方式。使用novalidate表单声明禁止任何浏览器
文章正文
AngularJS提供丰富填写表单和验证。我们可以用ng-click来处理AngularJS点击按钮事件,然后使用 $dirty 和 $invalid标志做验证的方式。使用novalidate表单声明禁止任何浏览器特定的验证。表单控件使用了大量的角活动。让我们快速浏览一下有关事件先。
事件
AngularJS提供可与HTML控件相关联的多个事件。例如ng-click通常与按钮相关联。以下是AngularJS支持的事件。
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
ng-click
使用点击一个按钮的指令,表单重置数据。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | <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@yiibai.com" ; } $scope .reset(); } </script> |
验证数据
可使用下面跟踪误差。
$dirty - 规定值已被改变。
$invalid- 该值的状态是无效的。
$error- 指出确切的错误。
例子
下面的例子将展示上述所有指令。
testAngularJS.html
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | <html> <head> <title>Angular JS Forms</title> <style> table, th , td { border: 1px solid grey; border-collapse: collapse; padding: 5px; } table tr:nth-child(odd) { background-color: #f2f2f2; } table tr:nth-child(even) { background-color: #ffffff; } </style> </head> <body> <h2>AngularJS Sample Application</h2> <div ng-app= "" ng-controller= "studentController" > <form name= "studentForm" novalidate> <table border= "0" > <tr><td>Enter first name:</td><td><input name= "firstname" type= "text" ng-model= "firstName" required> <span style= "color:red" ng-show= "studentForm.firstname.$dirty && studentForm.firstname.$invalid" > <span ng-show= "studentForm.firstname.$error.required" >First Name is required.</span> </span> </td></tr> <tr><td>Enter last name: </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.$error.required" >Last Name is required.</span> </span> </td></tr> <tr><td>Email: </td><td><input name= "email" type= "email" ng-model= "email" length= "100" required> <span style= "color:red" ng-show= "studentForm.email.$dirty && studentForm.email.$invalid" > <span ng-show= "studentForm.email.$error.required" >Email is required.</span> <span ng-show= "studentForm.email.$error.email" >Invalid email address.</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> function studentController( $scope ) { $scope .reset = function (){ $scope .firstName = "Mahesh" ; $scope .lastName = "Parashar" ; $scope .email = "MaheshParashar@yiibai.com" ; } $scope .reset(); } </script> <script src= "http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js" ></script> </body> </html> |
输出
在Web浏览器打开textAngularJS.html。看到结果如下。
以上就是AngularJS表单的知识整理,后续继续补充相关知识,谢谢大家对本站的支持!
代码注释