Want to upgrade project from Angular v5 to Angular v6

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

npm install -g @angular/cli
npm install @angular/cli
ng update @angular/cli --migrate-only --from=1.7.0
ng update @angular/core
npm install rxjs-compat
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.

Upgrade from Angular v6 to Angular v7

Version 7 of Angular has been released Official Angular blog link. Visit official angular update guide https://update.angular.io for detailed information. These steps will work for basic angular 6 apps using Angular Material.

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

Upgrade from Angular v5 to Angular v6

Version 6 of Angular has been released Official Angular blog link. I have mentioned general upgrade steps below, but before and after the update you need to make changes in your code to make it workable in v6, for that detailed information visit official website https://update.angular.io .

Upgrade Steps (largely taken from the official Angular Update Guide for a basic Angular app using Angular Material):

Make sure NodeJS version is 8.9+ if not update it.
Update Angular cli globally and locally, and migrate the old configuration .angular-cli.json to the new angular.json format by running the following:
```
npm install -g @angular/cli  
npm install @angular/cli  
ng update @angular/cli
```
Update all of your Angular framework packages to v6,and the correct version of RxJS and TypeScript by running the following:
```
ng update @angular/core
```
Update Angular Material to the latest version by running the following:
```
ng update @angular/material
```
RxJS v6 has major changes from v5, v6 brings backwards compatibility package rxjs-compat that will keep your applications working, but you should refactor TypeScript code so that it doesn't depend on rxjs-compat. To refactor TypeScript code run following:
```
npm install -g rxjs-tslint   
rxjs-5-to-6-migrate -p src/tsconfig.app.json
```
Note: Once all of your dependencies have updated to RxJS 6, remove rxjs- compat as it increases bundle size. please see this RxJS Upgrade Guide for more info.
```
npm uninstall rxjs-compat
```
Done run ng serve to check it.
If you get errors in build refer https://update.angular.io for detailed info.

Upgrade from Angular v5 to Angular 6.0.0-rc.5

Upgrade rxjs to 6.0.0-beta.0, please see this RxJS Upgrade Guide for more info. RxJS v6 has breaking change hence first make your code compatible to latest RxJS version.
Update NodeJS version to 8.9+ (this is required by angular cli 6 version)
Update Angular cli global package to next version.
```
npm uninstall -g @angular/cli
npm cache verify
```
if npm version is < 5 then use npm cache clean
```
npm install -g @angular/cli@next
```

Change angular packages versions in package.json file to ^6.0.0-rc.5

"dependencies": {
  "@angular/animations": "^6.0.0-rc.5",
  "@angular/cdk": "^6.0.0-rc.12",
  "@angular/common": "^6.0.0-rc.5",
  "@angular/compiler": "^6.0.0-rc.5",
  "@angular/core": "^6.0.0-rc.5",
  "@angular/forms": "^6.0.0-rc.5",
  "@angular/http": "^6.0.0-rc.5",
  "@angular/material": "^6.0.0-rc.12",
  "@angular/platform-browser": "^6.0.0-rc.5",
  "@angular/platform-browser-dynamic": "^6.0.0-rc.5",
  "@angular/router": "^6.0.0-rc.5",
  "core-js": "^2.5.5",
  "karma-jasmine": "^1.1.1",
  "rxjs": "^6.0.0-uncanny-rc.7",
  "rxjs-compat": "^6.0.0-uncanny-rc.7",
  "zone.js": "^0.8.26"
},
"devDependencies": {
  "@angular-devkit/build-angular": "~0.5.0",
  "@angular/cli": "^6.0.0-rc.5",
  "@angular/compiler-cli": "^6.0.0-rc.5",
  "@types/jasmine": "2.5.38",
  "@types/node": "~8.9.4",
  "codelyzer": "~4.1.0",
  "jasmine-core": "~2.5.2",
  "jasmine-spec-reporter": "~3.2.0",
  "karma": "~1.4.1",
  "karma-chrome-launcher": "~2.0.0",
  "karma-cli": "~1.0.1",
  "karma-coverage-istanbul-reporter": "^0.2.0",
  "karma-jasmine": "~1.1.0",
  "karma-jasmine-html-reporter": "^0.2.2",
  "postcss-loader": "^2.1.4",
  "protractor": "~5.1.0",
  "ts-node": "~5.0.0",
  "tslint": "~5.9.1",
  "typescript": "^2.7.2"
}

Next update Angular cli local package to next version and install above mentioned packages.

rm -rf node_modules dist # use rmdir /S/Q node_modules dist in Windows 
Command Prompt; use rm -r -fo node_modules,dist in Windows PowerShell
npm install --save-dev @angular/cli@next
npm install

The Angular CLI configuration format has been changed from angular cli 6.0.0-rc.2 version, and your existing configuration can be updated automatically by running the following command. It will remove old config file .angular-cli.json and will write new angular.json file.

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

Note :- If you get following error "The Angular Compiler requires TypeScript >=2.7.2 and <2.8.0 but 2.8.3 was found instead". run following command :

npm install [email protected]

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

Upgrade angular

https://update.angular.io/

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

Want to upgrade project from Angular v5 to Angular v6

Upgrade from Angular v6 to Angular v7

Upgrade from Angular v5 to Angular v6

Upgrade from Angular v5 to Angular 6.0.0-rc.5

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