/TypeScript/Share data across tab through localstorage

Share data across tab through localstorage

    import { Injectable, OnDestroy } from '@angular/core';
    import { Subject } from 'rxjs/Subject';
    import { share } from 'rxjs/operators';
    
    @Injectable()
    export class StorageService implements OnDestroy {
      private onSubject = new Subject<{ key: string, value: any }>();
      public changes = this.onSubject.asObservable().pipe(share());
    
      constructor() {
        this.start();
      }
    
      ngOnDestroy() {
        this.stop();
      }
    
      public getStorage() {
        let s = [];
        for (let i = 0; i < localStorage.length; i++) {
          s.push({
            key: localStorage.key(i),
            value: JSON.parse(localStorage.getItem(localStorage.key(i)))
          });
        }
        return s;
      }
    
      public store(key: string, data: any): void {
        localStorage.setItem(key, JSON.stringify(data));
        this.onSubject.next({ key: key, value: data})
      }
    
      public clear(key) {
        localStorage.removeItem(key);
        this.onSubject.next({ key: key, value: null });
      }
    
    
      private start(): void {
        window.addEventListener("storage", this.storageEventListener.bind(this));
      }
    
      private storageEventListener(event: StorageEvent) {
        if (event.storageArea == localStorage) {
          let v;
          try { v = JSON.parse(event.newValue); }
          catch (e) { v = event.newValue; }
          this.onSubject.next({ key: event.key, value: v });
        }
      }
    
      private stop(): void {
        window.removeEventListener("storage", this.storageEventListener.bind(this));
        this.onSubject.complete();
      }
    }

Source: stackoverflow.com

Similar codes

7 votes148 views5 answers
Running scripts is disabled on this system vscode
TypeScript
0 vote140 views1 answer
Module.exports mongodb connection
TypeScript
4 votes98 views1 answer
Typescript convert image base64 librarie
TypeScript
0 vote137 views1 answer
Mysql workbench an apparmor policy prevents this sender
TypeScript
1 vote133 views1 answer
How to add elements to Jlist
TypeScript
5 votes156 views3 answers
Typescript check type of variable
TypeScript
0 vote276 views1 answer
MAYA Simulation of how light propagates in an environment known as:
TypeScript
11 votes132 views1 answer
How to select last 2 elements in a string python
TypeScript
30 votes148 views3 answers
Empty character
TypeScript
-1 vote136 views1 answer
Returning objects in alphabetical order in ruby
TypeScript