Angular CLI RC.0 migration guide

In this migration guide we'll be looking at some of the major changes to CLI projects in the last two months.

Most of these changes were not breaking changes and your project should work fine without them.

But if you've been waiting for the perfect time to update, this is it! Along with major rebuild speed increases, we've been busy adding a lot of features.

RC means release candidate and we intend to stick to it. Unless there is a major breaking bug, we will not change the public surface of the API and its generated projects.

This means that a project upgraded now should need no more code changes all the way to 1.0.

Documentation has also completely moved to the wiki. The new Stories section covers common usage scenarios, so be sure to have a look!

Below are the changes between a project generated two months ago, with 1.0.0-beta.24 and a 1.0.0-rc.0 project. If you kept your project up to date you might have a lot of these already.

You can find more details about changes between versions in CHANGELOG.md.

If you prefer, you can also generate a new project in a separate folder using ng new upgrade-project --skip-install and compare the differences.

@angular/cli

Angular CLI can now be found on NPM under @angular/cli instead of angular-cli, and has a minimum requirement of Node 6.9.0 or higher, together with NPM 3 or higher.

If you're using Angular CLI beta.28 or less, you need to uninstall the angular-cli package.

npm uninstall -g angular-cli
npm uninstall --save-dev angular-cli

To update Angular CLI to a new version, you must update both the global package and your project's local package.

Global package:

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

Local project package:

rm -rf node_modules dist # use rmdir on Windows
npm install --save-dev @angular/cli@latest
npm install

.angular-cli.json

angular-cli.json is now .angular-cli.json, but we still accept the old config file name.

A few new properties have changed in it:

Schema

Add the $schema property above project for handy IDE support on your config file:

"$schema": "./node_modules/@angular/cli/lib/config/schema.json",

Polyfills

There is now a dedicated entry for polyfills (#3812) inside apps[0].polyfills, between main and test:

"main": "main.ts",
"polyfills": "polyfills.ts",
"test": "test.ts",

Add it and remove import './polyfills.ts'; from src/main.ts and src/test.ts.

We also added a lot of descriptive comments to the existing src/polyfills.ts file, explaining which polyfills are needed for what browsers. Be sure to check it out in a new project!

Environments

A new environmentSource entry (#4705) replaces the previous source entry inside environments.

To migrate angular-cli.json follow the example below:

Before:

"environments": {
  "source": "environments/environment.ts",
  "dev": "environments/environment.ts",
  "prod": "environments/environment.prod.ts"
}

After:

"environmentSource": "environments/environment.ts",
"environments": {
  "dev": "environments/environment.ts",
  "prod": "environments/environment.prod.ts"
}

Linting

The CLI now uses the TSLint API (#4248) to lint several TS projects at once.

There is a new lint entry in .angular-cli.json between e2e and test where all linting targets are listed:

"e2e": {
  "protractor": {
    "config": "./protractor.conf.js"
  }
},
"lint": [
  {
    "project": "src/tsconfig.app.json"
  },
  {
    "project": "src/tsconfig.spec.json"
  },
  {
    "project": "e2e/tsconfig.e2e.json"
  }
],
"test": {
  "karma": {
    "config": "./karma.conf.js"
  }
},

Generator defaults

Now you can list generator defaults per generator (#4389) in defaults.

Instead of:

"defaults": {
  "styleExt": "css",
  "prefixInterfaces": false,
  "inline": {
    "style": false,
    "template": false
  },
  "spec": {
    "class": false,
    "component": true,
    "directive": true,
    "module": false,
    "pipe": true,
    "service": true
  }
}

You can instead list the flags as they appear on the generator command:

"defaults": {
  "styleExt": "css",
  "component": {
    "inlineTemplate": false,
    "spec": true
  }
}

One tsconfig per app

CLI projects now use one tsconfig per app (#4924).

src/tsconfig.app.json: configuration for the Angular app.

{
  "compilerOptions": {
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "es2016",
      "dom"
    ],
    "outDir": "../out-tsc/app",
    "target": "es5",
    "module": "es2015",
    "baseUrl": "",
    "types": []
  },
  "exclude": [
    "test.ts",
    "**/*.spec.ts"
  ]
}

src/tsconfig.spec.json: configuration for the unit tests.

{
  "compilerOptions": {
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "es2016"
    ],
    "outDir": "../out-tsc/spec",
    "module": "commonjs",
    "target": "es6",
    "baseUrl": "",
    "types": [
      "jasmine",
      "node"
    ]
  },
  "files": [
    "test.ts"
  ],
  "include": [
    "**/*.spec.ts"
  ]
}

e2e/tsconfig.e2e.json: configuration for the e2e tests.

{
  "compilerOptions": {
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "es2016"
    ],
    "outDir": "../dist/out-tsc-e2e",
    "module": "commonjs",
    "target": "es6",
    "types":[
      "jasmine",
      "node"
    ]
  }
}

There is an additional root-level tsconfig.json that is used for IDE integration.

{
  "compileOnSave": false,
  "compilerOptions": {
    "outDir": "./dist/out-tsc",
    "target": "es5",
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [
      "es2016"
    ]
  }
}

You can delete e2e/tsconfig.json and src/tsconfig.json after adding these.

Also update .angular-cli.json to use them inside apps[0]:

"tsconfig": "tsconfig.app.json",
"testTsconfig": "tsconfig.spec.json",

Then update protractor.conf.js to use the e2e config as well:

beforeLaunch: function() {
  require('ts-node').register({
    project: 'e2e'
  });
},

package.json

We've updated a lot of packages over the last months in order to keep projects up to date.

Additions or removals are found in bold below.

Packages in dependencies:

@angular/* packages now have a ^2.4.0 minimum (^3.4.0 for router)
core-js remains unchanged at ^2.4.1
rxjs to ^5.1.0
zone.js to ^0.7.6

Packages in dependencies:

@angular/cli at 1.0.0-rc.0 replaces angular-cli
@angular/compiler-cli is also at ^2.4.0
@types/jasmine remains unchanged and pinned at 2.5.38
@types/node was updated to ~6.0.60
codelyzer was updated to ~2.0.0
jasmine-core was updated to ~2.5.2
jasmine-spec-reporter was removed
karma was updated to ~1.4.1
karma-chrome-launcher was updated to ~2.0.0
karma-cli was updated to ~1.0.1
karma-jasmine was updated to ~1.1.0
karma-jasmine-html-reporter was added at ^0.2.2
karma-coverage-istanbul-reporter was added at ^0.2.0, replacing karma-remap-istanbul
karma-remap-istanbul was removed
protractor was updated to ~5.1.0
ts-node was updated to ~2.0.0
tslint was updated to ~4.4.2
typescript was updated to ~2.0.0

See the karma and protractor sections below for more information on changed packages.

The [Linting rules](#Linting rules) section contains a list of rules that changed due to updates.

We also updated the scripts section to make it more simple:

"scripts": {
  "ng": "ng",
  "start": "ng serve",
  "test": "ng test",
  "lint": "ng lint",
  "e2e": "ng e2e"
},

karma.conf.js

Karma configuration suffered some changes to improve the code-coverage functionality, use the new @angular/cli package, and the new HTML reporter.

In the frameworks array update the CLI package to @angular/cli.

In the plugins array:

add require('karma-jasmine-html-reporter') and require('karma-coverage-istanbul-reporter')
remove require('karma-remap-istanbul')
update the CLI plugin to require('@angular/cli/plugins/karma')

Add a new client option just above patterns:

client:{
  clearContext: false // leave Jasmine Spec Runner output visible in browser
},
files: [

Change the preprocessor to use the new CLI package:

preprocessors: {
  './src/test.ts': ['@angular/cli']
},

Replace remapIstanbulReporter with coverageIstanbulReporter:

coverageIstanbulReporter: {
  reports: [ 'html', 'lcovonly' ],
  fixWebpackSourcePaths: true
},

Remove the config entry from angularCli:

angularCli: {
  environment: 'dev'
},

Update the reporters to use coverage-istanbul instead of karma-remap-istanbul, and add kjhtml (short for karma-jasmine-html-reporter):

reporters: config.angularCli && config.angularCli.codeCoverage
          ? ['progress', 'coverage-istanbul']
          : ['progress', 'kjhtml'],

protractor.conf.js

Protractor was updated to the new 5.x major version, but you shouldn't need to change much to take advantage of all its new features.

Replace the spec reporter import from:

var SpecReporter = require('jasmine-spec-reporter');

to

const { SpecReporter } = require('jasmine-spec-reporter');

Remove useAllAngular2AppRoots: true.

Update beforeLaunch as described in One tsconfig per app:

beforeLaunch: function() {
  require('ts-node').register({
    project: 'e2e'
  });
},

Update onPrepare:

onPrepare() {
  jasmine.getEnv().addReporter(new SpecReporter({ spec: { displayStacktrace: true } }));
}

Linting rules

The updated versions of tslint and codelyzer contain a few rule changes that you should apply to your tslint.json:

Add these new rules:

"callable-types": true,
"import-blacklist": [true, "rxjs"],
"import-spacing": true,
"interface-over-type-literal": true,
"no-empty-interface": true,
"no-string-throw": true,
"prefer-const": true,
"typeof-compare": true,
"unified-signatures": true,

Update no-inferrable-types to "no-inferrable-types": [true, "ignore-params"].

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