@spalger/kibana/src/ui/public/elastic_textarea.js

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

define(function (require) {
  var _ = require('lodash');
  var NL_RE = /\n/g;
  var events = 'keydown keypress keyup change';

  require('ui/modules').get('kibana')
  .directive('elasticTextarea', function () {
    return {
      restrict: 'A',
      link: function ($scope, $el) {

        function resize() {
          $el.attr('rows', _.size($el.val().match(NL_RE)) + 1);
        }

        $el.on(events, resize);
        $scope.$evalAsync(resize);
        $scope.$on('$destroy', function () {
          $el.off(events, resize);
        });

      }
    };

  });
});