ngMessage 在 AngularJs 中不起作用-解网

问：

我正在对必需的 ng-Message 进行简单的验证，但找不到 ng-Message 在错误输入或单击提交时工作。有人可以帮我解决我哪里错了吗？

HTML格式：

<html>
<head>
    <!-- Script Files --> 
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular.min.js"></script>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-messages.js"></script>
</head>
<body ng-app="myApp" ng-controller="myCtrl">

    <form name="form1" id="form1" novalidate> 
        <input type="text" name="age" ng-minlength="3" required/> 
        <div ng-messages="form1.age.$error" ng-show="(form1.age.$error.required || form1.age.$error.minlength) && (form1.age.$touched || form1.$submitted) " >
            <div ng-message="required">This is required</div>
            <div ng-message="minlength">Length is too less</div>

        </div>
        <a data-ng-click="submit(form1.$invalid)">Click</a> 
    </form>

    <script>
    //module declaration
    var app = angular.module('myApp', ['ngMessages']);
    //controller declaration
    app.controller('myCtrl', function($scope) {
        var submit = function(invalid){
            if(invalid) return;
        }
    });
    </script>
</body>
</html>

JavaScript angularjs 使用指令

ngMessage 在 AngularJs 中不起作用

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