当用户开始在angularjs中键入(输入字段长度> 0)时如何检查ng模式? [英] how to check ng-pattern when user start typing(input field length >0) in angularjs?
本文介绍了当用户开始在angularjs中键入(输入字段长度> 0)时如何检查ng模式?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想检查模式检查输入字段的长度是否大于0，我该怎么做.
I want to check pattern check if input field length > 0 how can i do this .
期望
- 当输入字段为空时显示所需消息(已触摸)
- 开始键入后，需要检查模式是否不匹配，需要显示请输入有效输入"，并且如果输入字段的长度为0，则仅需要显示要求的消息
(function(angular) {
'use strict';
angular.module('ngMessagesExample', ['ngMessages']);
})(window.angular);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular-messages.js"></script>
<div ng-app='ngMessagesExample'>
<!-- App goes here -->
<form name="test" novalidate ng-submit="test.$valid && submit()">
<div layout-gt-md="row">
<md-input-container class="md-block" flex-gt-xs>
<label>Number</label>
<input required ng-model="user.number" name="number" ng-pattern="/^[0-9]+(\.[0-9]{1,2})?$/" >
<div ng-messages="test.number.$error">
</div>
<div ng-messages="test.$error" ng-show="test.number.$dirty">
<div ng-message="required">number is required</div>
</div>
<span ng-show="!test.number.$valid">Please Enter Valid Input</span>
</md-input-container>
</div>
</form>
</div>
帮帮我
推荐答案
我已经更新了HTML中的代码
i have updated the code in HTML
<!doctype html>
<html lang="en">
<head>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular-messages.js"></script>
<script src="script.js"></script>
</head>
<body>
<div ng-app='ngMessagesExample'>
<!-- App goes here -->
<form name="test" novalidate ng-submit="test.$valid && submit()">
<div layout-gt-md="row">
<md-input-container class="md-block" flex-gt-xs>
<label>Number</label>
<input required ng-model="user.number" name="number" ng-pattern="/^[0-9]+(\.[0-9]{1,2})?$/" >
<div ng-messages="test.number.$error">
</div>
<div ng-messages="test.$error" ng-show="test.number.$dirty"><div ng-message="required">number is required</div></div>
<span ng-show="test.number.$error.pattern">Please Enter Valid Input</span>
</md-input-container>
</div>
</form>
</div>
</body>
</html>
这篇关于当用户开始在angularjs中键入(输入字段长度> 0)时如何检查ng模式?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
