JSFiddle - React, Tailwind, and code Playground

by Annie Lagang

HTML

<div ng-app="demoApp">
  <input type="text" id="phonenumber" phone-input ng-model="USPhone" >
  <p>{{USPhone | tel}}</p>
</div>

JavaScript

// SOURCE: https://stackoverflow.com/a/35174052/906815

/* Rules: 
1. Restrict input in these fields to numerical characters only (excluding parenthesis, space and hyphens)
2. Not more than 10 characters
*/

var demoApp = angular.module('demoApp', []);
 
demoApp.directive('phoneInput', [ '$filter', '$browser', function($filter, $browser) {
	return {
		require: 'ngModel',
		link: function($scope, $element, $attrs, ngModelCtrl) {
			var listener = function() {
				var value = $element.val().replace(/[^0-9]/g, '');
				$element.val($filter('tel')(value, false));
			};

			// This runs when we update the text field
			ngModelCtrl.$parsers.push(function(viewValue) {
				return viewValue.replace(/[^0-9]/g, '').slice(0,10);
			});

			// This runs when the model gets updated on the scope directly and keeps our view in sync
			ngModelCtrl.$render = function() {
				$element.val($filter('tel')(ngModelCtrl.$viewValue, false));
			};

			$element.bind('change', listener);
			/*$element.bind('keydown', function(event) {
				var key = event.keyCode;
				// If the keys include the CTRL, SHIFT, ALT, or META keys, or the arrow keys, do nothing.
				// This lets us support copy and paste too
				if (key == 91 || (15 < key && key < 19) || (37 <= key && key <= 40)){
					return;
				}
				$browser.defer(listener); // Have to do this or changes don't get picked up properly
			});

			$element.bind('paste cut', function() {
				$browser.defer(listener);
			});*/
		}
	};
}]); 
 
// existing code phoneFormatter filter 
demoApp.filter('tel', [ '$window', function($window) {
	return function(str, plain) {
    if (!str) return str;

    if (!plain) {
      var trimmed = str.trim(),
        patt = /\([0-9]{3}\)\s{1}[0-9]{3}\-[0-9]{4}/,
        parsed = ['('];

      if (trimmed && !patt.test(trimmed)) {
        var arr = trimmed.split('');
        
        angular.forEach(arr, function(val) {
          if (parsed.length == 4) {
            parsed.push(')'); parsed.push(' ');
          }...