Want to upgrade project from Angular v5 to Angular v6

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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 typescript@2.7.2

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