Two-way directive for stripping HTML from a input field. It will filter HTML as the user types it or as the variable linked to ngModel changes.

gistfile1.js

(function() {
  'use strict';
  /**
   * @ngdoc directive
   * @name stripHtml
   * @module humansized.directives.stripHtml
   * @restrict A
   *
   * @description
   *
   * A directive that strips the HTML as part of the text element validation pipeline
   *
   * @usage
   *
   *  %textarea(ng-model="org.description" columns="1" md-maxlength="250" strip-html)
   */
  var stripHtml = function() {
    return {
      require: 'ngModel',
      restrict: 'A',
      link: function(scope, element, attrs, modelCtrl) {

        modelCtrl.$parsers.push(function(inputValue) {
          var transformedInput = String(inputValue).replace(/<[^>]+>/gm, '');
          if (transformedInput !== inputValue) {
            modelCtrl.$setViewValue(transformedInput);
            modelCtrl.$render();
          }

          return transformedInput;
        });

        modelCtrl.$formatters.push(function(data) {
          if(angular.isDefined(data)){
            return String(data).replace(/<[^>]+>/gm, '');
          } else {
            return data;
          }
        });
      }
    };
  };

  angular.module('humansized.directives')
    .directive('stripHtml', stripHtml);
})();