angularjs的表单验证

MJ.Zhou

发布于 2018-01-04 08:49:26

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代码可运行

文章被收录于专栏：.NET开发那点事.NET开发那点事

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代码可运行

angularjs内置了常用的表单验证指令，比如min，require等。下面是演示：

<!DOCTYPE html>
<html>
    <head>
          <meta charset="UTF-8">
    </head>
    <body ng-app="app" ng-controller="ctrl" >
        <style>
            .valid-error{
                color:red
            }
        </style>
        <form name="form" novalidate>
             <input type="text" ng-model="value0" required name="input0">
             <span class="valid-error" ng-show="form.input0.$error.required">
                        值必须输入
            </span>
            <input type="number" ng-model="value1" min="0" name="input1">
             <span class="valid-error" ng-show="form.input1.$error.min">
                        值必须大于等于0
            </span>
        </form>
    </body>
    <script src="bower_components/angular/angular.js">
    </script>
    <script>
        var app = angular.module('app',[]);
        app.controller('ctrl',function($scope){
            $scope.value0='1';
            $scope.value1=0;
        });
    </script>
</html>

我们也可以自定义一个验证指令，比如验证电话号码的。

   <input type="text" ng-model="phoneNum"  name="phoneNum" phone>
             <span class="valid-error" ng-show="form.phoneNum.$error.phone">
                       电话号码不合法
            </span>

 var PHONE_REGEXP = /(^(\(\d{3,4}-)|\d{3.4}-)?\d{7,8}$/;     app.directive('phone', function () {
            return {
                require: 'ngModel',
                link: function (scope, elm, attrs, ctrl) {
                    ctrl.$validators.phone = function (modelValue, viewValue) {
                        if (ctrl.$isEmpty(modelValue)) {
                            // consider empty models to be valid
                            return true;
                        }

                        if (PHONE_REGEXP.test(viewValue)) {
                            // it is valid
                            return true;
                        }

                        // it is invalid
                        return false;
                    };
                }
            };
        });