AngularJS 表单验证手机号的实例(非必填)

<form ng-app="myApp" ng-controller="validateCtrl" 
name="myForm" novalidate>

<p>电话:<br>
<input type="text" name="phone" ng-model="phone" ng-pattern="/(^$)|^(((\+86)|(86))">
<span style="color:red" ng-show="myForm.phone.$dirty && myForm.phone.$invalid">
  联系电话格式不正确！</span>
</p>

<p>
<input type="submit"
ng-disabled="myForm.$invalid">
</p>
</form>