/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

6 votes40 views4 answers
Data
TypeScript
0 vote29 views1 answer
Cannot find module '@azure/msal-angular' or its corresponding type declarations.ts(2307)
TypeScript
7 votes31 views2 answers
Add new key in array objects using map
TypeScript
1 vote28 views1 answer
Concat string typescript
TypeScript
0 vote38 views1 answer
How to install tsu
TypeScript
0 vote29 views1 answer
Where do you store your test data
TypeScript
0 vote30 views1 answer
How to gray out the unused imports in vscode
TypeScript
0 vote34 views1 answer
Styled components gatsby
TypeScript
0 vote34 views1 answer
In order to allow non-dict objects to be serialized set the safe parameter to False.
TypeScript
0 vote29 views1 answer
Haproxy stats config
TypeScript