ng-disable a button if ng-pattern of input does not match
Question
I want to disable a button with ng-disable if ng-pattern of an input field does not match the regular expression. In this case the regular expression is "[0-9]". I have tried the following code:
Index.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns="http://www.w3.org/1999/xhtml" ng-app="Filter">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ASCII" />
<title>Test</title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.js"></script>
<script type="text/javascript" src="Test.js"></script>
</head>
<body>
<div class="ctrl" ng-controller="Ctrl">
Text <input type="text" ng-model="input_field" ng-pattern="[0-9]"><br/>
<button ng-disabled="input_field.$valid">Start Filter</button>
</div>
</body>
</html>
Test.js
Module.controller('Ctrl', function($scope){
$scope.input_field = "Insert your Text here!";
}
Unfortunately it is not working. I have tried many ways but nothing worked. Do you have any ideas how to disable the button if the pattern do not match.
1 answers
solution1
2 2018-01-31 16:13:08
I think you should wrap it with <form> and fix the syntax: $error instead of $valid , [0-9] -> /^[0-9]/ . Here is a demo, adjust it appropriately:
<!DOCTYPE html> <html> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script> <body> <div ng-app="myApp" ng-controller="myCtrl"> <form name="myForm"> Input: <input type="text" ng-model="input_field" name="input_field" ng-pattern="/^[0-9]/" placeholder="Insert a number"><br/> <button ng-disabled="myForm.input_field.$error.pattern || !input_field">Start Filter</button> </form> </div> <script> var app = angular.module('myApp', []); app.controller('myCtrl', function($scope) {}); </script> </body> </html>
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