From SO question: https://stackoverflow.com/questions/71547580/dynamically-add-validation-observables-using-rxjs
原文http://www.cnblogs.com/woshinidezhu/p/Form-validation-with-AngularJS.html 客户端表单验证是AngularJS里面最酷的功能之一。 AngularJS表单验证可以让你从一开始就写出一个具有交互性和可相应的现代HTML5表单。 在AngularJS中,有许多表单验证指令。在这里,我们将谈谈几个最流行指令,然后我们将讨论如何编写自...
<h2>Validation Example</h2> <formng-app="myApp"ng-controller="validateCtrl" name="myForm"novalidate> <p>Username:<br> <inputtype="text"name="user"ng-model="user"required> <spanstyle="color:red"ng-show="myForm.user.$dirty && myForm.user.$invalid"> ...
var app = angular.module('validationExample', []); app.directive('ensureUnique', ['$http', function($http) { return { require: 'ngModel', link: function(scope, ele, attrs, c) { scope.$watch(attrs.ngModel, function() { $http({ method: 'POST', url: '/api/check/' + attrs.ens...
angular.module('formExample', []) .controller('ExampleController', ['$scope', function($scope) { $scope.master = {}; $scope.update = function(user) { $scope.master = angular.copy(user); }; $scope.reset = function() { $scope.user = angular.copy($scope.master); }; $scope.reset...
.form-error input.ng-invalid { border-color:red; } We can also show the error messages in red using a CSS class: .error-messages { color:red; } After putting everything together, let’s see an example of how our client-side form validation will look when filled out with a mix of ...
This is the base class for FormControl, FormGroup, and FormArray. The validator function must return a list of errors i.e ValidationErrors or null if the validation has passed. The only difference it has with the Sync Validator is the return type. It must return either a promise or an ...
FormControl is one of the three fundamental building blocks of Angular forms, along with FormGroup and FormArray. It extends the AbstractControl class that implements most of the base functionality for accessing the value, validation status, user interactions, and events. ...
theallowedExtentions,minFileSizeandmaxFileSizeproperties. The files can be validated before uploading to the server and can be ignored on uploading. Also, you can validate the files by setting the HTML attributes to the original input element. The validation process occurs on drag-and-drop the ...
(e.g. before saving the form) To force the validity check, broadcast the show-errors-check-validity event. Example <form name="userForm"> <div class="form-group" show-errors> <input type="text" name="firstName" ng-model="firstName" ng-required /> </div> <input type="submit" ng-...