IKatsuba

window.navigator.language        // -> "fr"
window.navigator.languages       // -> ["fr-FR", "fr", "en-US", "en", "es", "de"]
window.navigator.userLanguage    // -> undefined
window.navigator.browserLanguage // -> undefined
window.navigator.systemLanguage  // -> undefined

IKatsuba

const skipWaiting = () => self.skipWaiting();
const unregister = (event) => {
  event.waitUntil(self.clients.claim());

  self.registration.unregister()
    .then(() =>
      console.log('Unregistered old service worker'));
};

self.addEventListener('install', skipWaiting);

IKatsuba

{
   "version": 1,
   "projects": {
     "app": {
       "architect": {
         "stepper": {
           "builder": "@ ng-builders / build: stepper",
           "options": {
             "targets": { // description of targets
               "jest": { // target name and configuration

IKatsuba

export interface Target {
   / **
    * A list of target ids that must be completed before starting the task
    *
    * Differs from Schema#steps in that the task does not wait for the full
    * performing dependent tasks
    * /
   deps?: string[];
   / **
    * Purpose to fulfill

IKatsuba

// index.ts
 export function runStepper(
   input: Schema,
   context: BuilderContext
 ): BuilderOutputLike {
   return buildSteps(input, context).pipe (
     map(() => ({
       success: true
     })),
     catchError(error => {

IKatsuba

// index.ts
 function buildSteps(config: Schema, context: BuilderContext): Observable<any> {
   return concat(
      config.steps.map(step => buildStep(step, config.targets, context))
   );
 }

IKatsuba

// index.ts
 function buildStep(
   stepName: string,
   targets: Targets,
   context: BuilderContext
 ): Observable<any> {
   const {deps = [], overrides, target, watch}: Target = targets[stepName];

   const deps$ = deps.length
     ?  combineLatest(deps.map(depName => buildStep(depName, targets, context)))

IKatsuba

{
   "$ schema": "../../@angular-devkit/architect/src/builders-schema.json",
   "builders": {
     "stepper": {
       "implementation": "./stepper",
       "schema": "./schema.json",
       "description": "Stepper"
     }
   }
 }

IKatsuba

const items = [1, 2, 3, 4];
//before
const first = items[0];
//after
const first = items.first;

IKatsuba

const items = [1, 2, 3, 4];
//before
const last = items[items.length - 1];
//after
const last = items.last;