Software⏱️ 3 min read📅 2026-06-03

How to Fix: Failed to instantiate module [$injector:unpr] Unknown provider: $routeProvider

AngularJS upgrade error due to $routeProvider dependency.

Quick Answer: Check if you've removed or commented out the $routeProvider in your module, and ensure it's properly registered.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🔧 Proven Troubleshooting Steps
  3. ✨ Wrapping Up

The error 'Failed to instantiate module [$injector:unpr] Unknown provider: $routeProvider' occurs when AngularJS is unable to resolve the dependency on $routeProvider in your application. This issue affects users who have upgraded from AngularJS 1.0.7 to 1.2.0rc1.

This error can be frustrating as it prevents the application from functioning correctly and may lead to unexpected behavior or errors. However, don't worry, we're here to help you troubleshoot and resolve this issue.

🛑 Root Causes of the Error

  • The primary reason for this error is the deprecation of $routeProvider in AngularJS 1.2.0rc1. The new default route provider is $stateProvider, which requires a different configuration.
  • An alternative cause could be a mismatch between the version of $routeProvider and the version of AngularJS being used. If you're using an older version of $routeProvider, it may not be compatible with the newer version of AngularJS.

🔧 Proven Troubleshooting Steps

Enabling the $stateProvider

  1. Step 1: Step 1: Update your configuration to use the new default route provider, $stateProvider. You can do this by adding the following line to your app module: angular.module('yourApp').config(['$stateProvider', function($stateProvider) { $stateProvider.state('yourState', { url: '/yourUrl', templateUrl: 'yourTemplate.html' }); }]);
  2. Step 2: Step 2: Remove any references to $routeProvider from your application. This includes removing the provider and any dependencies on it.
  3. Step 3: Step 3: Update any routes that were previously defined using $routeProvider to use the new $stateProvider syntax.

Using a polyfill for $routeProvider

  1. Step 1: Step 1: Install a polyfill for $routeProvider using npm or yarn. You can use the 'angular-route' package.
  2. Step 2: Step 2: Import the polyfill in your application and add it to the injector. This will allow you to continue using $routeProvider until you're ready to make the switch to $stateProvider.

✨ Wrapping Up

By following these steps, you should be able to resolve the 'Failed to instantiate module [$injector:unpr] Unknown provider: $routeProvider' error and get your application up and running again. Remember to keep an eye on future releases of AngularJS and plan for any potential changes to the route providers.

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