angularJs form
form.name.$valid是否有效
form.name.$invalid 是否无效
form.name.$error错误的集合
form.name.$error.required
form.name.$error.email
控制submit按钮是否disabled 启用ng-disabled="form.$invalid"
下面是验证是否用户名唯一的简单写法
DOCTYPE html><html>
<head><title>title><script src="angular.min.js" type="text/javascript">script>
head>
<body ng-app="formTest" ng-controller="formController"><form name="myForm" ng-submit="show()"><input name="personName" required ng-model="person.name" ensure-Unique="personName"/><span>span><input type="submit" ng-disabled="myForm.$invalid"/>form><script>var formTest = angular.module("formTest", []);formTest.controller("formController", function ($scope) {$scope.person = {email: "",name: "Jackey"};$scope.show = function () {//alert($scope.person.name);
console.log(myForm.personName.$error)};}).directive("ensureUnique", function ($http) {return {require: "ngModel",link: function (scope, element, attrs) {scope.$watch(attrs.ngModel, function () {
//$http.....console.log(scope.person.name);element.next("span").text(scope.person.name);//显示是否存在唯一
});}};});script>
body>
html> 再修改一下
DOCTYPE html><html>
<head><title>title><script src="angular.min.js" type="text/javascript">script>
head>
<body ng-app="formTest" ng-controller="formController"><form name="myForm" ng-submit="show()"><input name="personName" required ng-model="person.name" ensure-Unique="personName"/><span>span><input type="submit" ng-disabled="myForm.$invalid"/>form><script>var formTest = angular.module("formTest", []);formTest.controller("formController", function ($scope) {$scope.person = {email: "",name: ""};$scope.show = function () {//alert($scope.person.name);
console.log(myForm.personName.$error)};}).directive("ensureUnique", function () {return {require: "ngModel",link: function (scope, element, attrs) {scope.$watch(attrs.ngModel, function (n) {if (!n) return;console.log(n);element.next("span").text(scope.person.name); //显示是否存在唯一
});}};});script>
body>
html>
转载于:https://www.cnblogs.com/lihaozhou/p/3674957.html
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