[angular] Want to upgrade project from Angular v5 to Angular v6

As Angular 6 is here, I want to upgrade or move my angular 5 client application to angular 6, but I'm not getting any tutorial or anything which can guide me through.

According to me I just need to run a new Angular CLI and then have to move my older source to new project. I read the Angular 6 is using a new renderer called Ivy. Will I have to change my project according to Ivy?

Just use the official upgrade guide which will tell you what you need to do for your own particular needs:

https://update.angular.io/

This is how I make it work.

My Environment:

Angular CLI Global : 6.0.0, Local: 1.7.4, Angular: 5.2, Typescript 2.5.3

Note: To enable ng Update you need to install Angular CLI 6.0 first npm install -g @angular/cli or npm install @angular/cli

1. ng update //update Angular Package core/common/complier... to 6.0.0

2. ng update @angular/cli //change angular-cli.json to angular.json

optional if you have angular-material 5.4.2, ngx-translate 9.1.1, ng-bootstrap/ng-bootstrap 1.1.1:

3. ng update @angular/material //upgrade to 6.0.1

4. npm install @ngx-translate/[email protected] --save //upgrade ngX translate to 10.0.1 for Angular 6

5 npm install --save @ng-bootstrap/[email protected] //for ng-bootstrap

If you use Observable and get the error:

ERROR in node_modules/rxjs/Observable.d.ts(1,15): error TS2307: Cannot find module 'rxjs-compat/Observable'. node_modules/rxjs/observable/of.d.ts(1,15): error TS2307: Cannot find module 'rxjs-compat/observable/of'.

Change: import { Observable } from "rxjs/Observable"; import { of } from 'rxjs/observable/of';

To

import { Observable, of } from "rxjs";

Angular CLI issue: https://github.com/angular/angular-cli/issues/10621

Check the step by step upgrade details from Angular 5 to Angular 6. These provides details on issues you encounter during upgrade and how to resolve them.

• Update your node version to 8 or above and Install Angular cli latest globally by npm i -g @angular/cli@latest.
• Angular 6 uses angular.json as configuration file instead of .anguar-cli.json. Also tslint has been changed. Check https://github.com/angular/angular-cli/wiki/angular-workspace for latest configuration details. You have to move any of your existing configuration to new configuration file.
• To do this create another dummy project with latest cli using ng new ‘your-project’ and same defaults such as prefix, style etc you used earlier for your project. Create new project with cli https://github.com/angular/angular-cli/wiki/new
• Use https://update.angular.io/ to check what has been changed from your current version of Angular ? Angular 6. It provides usage of how to change/fix them.
• Follow the steps above and copy/update the angular.json file created in step2. Do npm i in your project to get all dependencies and do npm update
• Now comes the big part. RxJS upgrade and resolving conflicts. RxJS has standardised imports of operators and Observable creators with this release. Do npm i -g rxjs-tslint and add below lint configuration in tslint.json

{
  "rulesDirectory": [
    "node_modules/rxjs-tslint"
  ],
  "rules": {
    "rxjs-collapse-imports": true,
    "rxjs-pipeable-operators-only": true,
    "rxjs-no-static-observable-methods": true,
    "rxjs-proper-imports": true
  }
}

• Now run ng lint --fix. This fixes few items but most of the remaining issues will be highlighted and you have to fix it manually.

Operators Name change:

do -> tap, 
catch -> catchError, 
switch -> switchAll, 
finally -> finalize

All operators moved to rxjs/operators

import { map, filter, reduce } from 'rxjs/operators';

Observable creation methods are moved to rxjs

   import { Observable, Subject, of, from } from 'rxjs'; 

You are all set. Welcome to Angular 6 :) Check my blog post here on how to upgrade

Complete guide

-----------------With angular-cli--------------------------

1. Update CLI globally and locally

1. Using NPM ( make sure that you have node version 8+ )

   npm uninstall -g @angular/cli npm cache clean npm install -g @angular/cli@latest npm i @angular/cli --save

2. Using Yarn

   yarn remove @angular/cli yarn global add @angular/cli yarn add @angular/cli

2.Update dependencies

ng update @angular/cli
ng update @angular/core
ng update @angular/material
ng update rxjs

Angular 6 now depends on TypeScript 2.7 and RxJS 6

Normally that would mean that you have to update your code everywhere RxJS imports and operators are used, but thankfully there’s a package that takes care of most of the heavy lifting:

npm i -g rxjs-tslint 

//or using yarn

yarn global add rxjs-tslint

Then you can run rxjs-5-to-6-migrate

rxjs-5-to-6-migrate -p src/tsconfig.app.json

finally remove rxjs-compat

npm uninstall rxjs-compat

// or using Yarn

yarn remove rxjs-compat

Refer to this link https://alligator.io/angular/angular-6/

-------------------Without angular-cli-------------------------

So you have to manually update your package.json file.

Then run

 npm update
 npm install --save rxjs-compat
 npm i -g rxjs-tslint
 rxjs-5-to-6-migrate -p src/tsconfig.app.json

Please run the below comments to update to Angular 6 from Angular 5

1. ng update @angular/cli
2. ng update @angular/core
3. npm install rxjs-compat (In order to support older version rxjs 5.6 )
4. npm install -g rxjs-tslint (To change from rxjs 5 to rxjs 6 format in code. Install globally then only will work)
5. rxjs-5-to-6-migrate -p src/tsconfig.app.json (After installing we have to change it in our source code to rxjs6 format)
6. npm uninstall rxjs-compat (Remove this finally)

As Vinay Kumar pointed out that it will not update global installed Angular CLI. To update it globally just use following commands:

npm uninstall -g @angular/cli
npm cache clean
npm install -g @angular/cli@latest

Note if you want to update existing project you have to modify existing project, you should change package.json inside your project.

There are no breaking changes in Angular itself but they are in RxJS, so don't forget to use rxjs-compat library to work with legacy code.

  npm install --save rxjs-compat  

I wrote a good article about installation/updating Angular CLI http://bmnteam.com/angular-cli-installation/

Angular 6 has just been released.

https://blog.angular.io/version-6-of-angular-now-available-cc56b0efa7a4

Here is what worked for one of my smaller projects

1. npm install -g @angular/cli
2. npm install @angular/cli
3. ng update @angular/cli --migrate-only --from=1.7.0
4. ng update @angular/core
5. npm install rxjs-compat
6. ng serve

You might need to update your run scripts in package.json For eg. if you use flags like "app" and "environment" These have been updated to "project" and "configuration" respectively.

Refer https://update.angular.io/ for more detailed guide.

I had to re-run ng update @angular/cli for angular-cli.json to be changed to angular.json

simply run the following command:

ng update

note: this will not update globally.

There are few steps to upgrade 2/4/5 to Angular 6.

npm uninstall --save-dev angular-cli
npm install --save-dev @angular/cli@latest
npm install

To fix the issue related to "angular.json" :-

ng update @angular/cli --migrate-only --from=1.7.4

Store MIGRATION
https://github.com/ngrx/platform/blob/master/MIGRATION.md#ngrxstore

RXJS MIGRATION
https://www.academind.com/learn/javascript/rxjs-6-what-changed/

Hoping this will help you :)