/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

0 vote357 views1 answer
Latest unity version that supports 32 bit
TypeScript
0 vote336 views1 answer
How to ignore a field while desiarilizing in java if its type is not wrong
TypeScript
189 votes428 views27 answers
Reduce javascript
TypeScript
1 vote338 views1 answer
Smooth scroll in viewportscroller
TypeScript
0 vote337 views2 answers
File_get_contents url fail
TypeScript
0 vote351 views1 answer
Matlab components area
TypeScript
0 vote441 views1 answer
Error: ENOENT: no such file or directory, stat '/home/alafia/.steampath' npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! [email protected] start: `react-scripts start` npm ERR! Exit status 1
TypeScript
0 vote398 views1 answer
Downgrade typescript version
TypeScript
3 votes327 views1 answer
How to make s3 bucet objects publicj
TypeScript
0 vote336 views1 answer
Regroupe les éléments de 2 tableaux java
TypeScript