validate username using custom directives in angularjs

Hi Experts ,

I have to validate username  (no special characters & digits)  across different forms / pages in AngularJS. So I want to create custom directive that can  be used at multiple forms/pages. I need sample working code using AngularJS.

Thanks in Advance
Who is Participating?
leakim971Connect With a Mentor PluritechnicianCommented:
What about :
you just need to add good-username in your username field

	App.directive("goodUsername", function() {
		return {
			require: "ngModel",
			restrict: "A",
			link: function(scope, el, attrs, ctrl) {
				ctrl.$parsers.unshift(function(viewValue) {
					var result = !/[^a-z0-9]/.test(viewValue);
					ctrl.$setValidity("goodUsername", result);
                    return viewValue;

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Which criteria do you want to be applied to your username (es. only characters)?
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