Use error property to check if a problem occurred during formatting

         
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        
        import mx.formatters.*;
        public function formatThis(plainText:String):String
        {
            var fmtPhone:PhoneFormatter = new PhoneFormatter();
            var formattedString:String = fmtPhone.format(plainText);
            
            if(fmtPhone.error == "Invalid value")
            {
            
                mx.controls.Alert.show('invalid.');
            
            }else if(fmtPhone.error == "Invalid format"){
            
                mx.controls.Alert.show('invalid.');
            
            }
            return(formattedString);
        }
      
    </mx:Script>
    <mx:Label text="{formatThis('222')}" />
</mx:Application>

1.	Using declared PhoneFormatter defined in mxml
2.	PhoneFormatter for formatting unformatted phone digits
3.	Using ActionScript to format based on data length
4.	Create an instance of a PhoneFormatter using ActionScript
5.	Set format string for PhoneFormatter
6.	Set validPatternChars for PhoneFormatter
7.	Add area code for PhoneFormatter
8.	Set area code format for PhoneFormatter
9.	Using the PhoneFormatter class
10.	PhoneFormatter and formatting parameters

Use error property to check if a problem occurred during formatting : PhoneFormatter « Data Model « Flex

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