Want to upgrade project from Angular v5 to Angular v6

Question

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?

Answer 1

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):

1. Make sure NodeJS version is 8.9+ if not update it.

2. 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
   

3. 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
   

4. Update Angular Material to the latest version by running the following:

   ng update @angular/material
   

5. 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
   

6. 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

1. 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.

2. Update NodeJS version to 8.9+ (this is required by angular cli 6 version)

3. 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
   

4. 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"
   }
   

5. 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 
   

6. 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]

Answer 2

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.