AngularJS Decorate filter


When decorating filters, name parameter must include Filter suffix (case sensitive). If filter is called repeat, decorator parameter is repeatFilter. Below we'll decorate custom filter that repeats any given string n times so that result is reversed. You can also decorate angular's build-in filters the same way, although not recommended as it can affect the functionality of the framework.

  <div ng-bind="'i can haz cheeseburger ' | repeat:2"></div>

angular.module('app', [])
  .config(function($provide) {
    $provide.decorator('repeatFilter', function($delegate) {
      return function reverse(input, count) {
        // reverse repeated string
        return ($delegate(input, count)).split('').reverse().join(''); 
  .filter('repeat', function() {
    return function(input, count) {
      // repeat string n times
      return (input || '').repeat(count || 1);