universal-statuspage/src/app/_service/storage.service.ts

import {Inject, Injectable, PLATFORM_ID} from '@angular/core';
import {isPlatformBrowser} from '@angular/common';

@Injectable({
  providedIn: 'root'
})
export class StorageService {
  constructor(@Inject(PLATFORM_ID) private platformId: Object) {
  }

  getValue(key: string): any {
    if (!isPlatformBrowser(this.platformId)) {
      return null;
    }
    try {
      return JSON.parse(localStorage.getItem(key));
    } catch (e) {
      return null;
    }
  }

  setValue(key: string, value: any): void {
    if (isPlatformBrowser(this.platformId)) {
      try {
        localStorage.setItem(key, JSON.stringify(value));
      } catch (e) {
      }
    }
  }
}