how to migrate from angularjs to angular a step by step guide

migrating from angularjs (angular 1.x) to angular (angular 2+) is a significant task, as the two frameworks have different architectures, concepts, and syntax. below is a step-by-step guide to help you through the migration process, complete with code examples.

step 1: assess your application

before you begin the migration, assess your existing angularjs application:

- identify the size and complexity of your application.
- list the components, services, directives, and other features.
- determine dependencies on third-party libraries.

step 2: set up the new angular environment

1. **install angular cli:**
install angular cli globally on your system.



2. **create a new angular project:**
generate a new angular project using angular cli.



3. **set up the development environment:**

step 3: use ngupgrade for hybrid apps

if you want to run angularjs and angular side by side, you can use `ngupgrade`. this allows you to gradually migrate parts of your application.

1. **install `ngupgrade`:**



2. **bootstrap the hybrid application:**



step 4: migrate components

start migrating your components from angularjs to angular.

1. **angularjs component example:**



2. **angular component example:**



3. **register the angular component:**

use `downgradecomponent` to register the angular component in the angularjs module.



step 5: migrate services

1. **angularjs service example:**



2. **angular service example:**



3. **inject angular service into angularjs:**

use `downgradeinjectable` to use the angular service in angularjs.



step 6: migrate routing

routing in angular differs significantly from angularjs. if you are using angularjs's `$routeprovider`, you will need to migrate to angular's router.

1. **angularjs router example:**



2. **angular router ...

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