angular-async-cache is a simple utility to help cache promises and notes to enable an easy offline first approach in angular 6+ applications.
async data binding angular, async calls in angular, is angular subscribe async, import async in angular, angular use async pipe in component, angular async pipe input
How to make use of it:
Installation:
npm install --save angular-async-cache
1. This setting will first release the cached data (for faster load times + first support offline), then it will find and resend live data and refresh the cache for future requests.
import { NgModule, Component, Injectable } from '@angular/core'; import { HttpClientModule } from '@angular/common/http'; import { AsyncCache, LocalStorageDriver, MemoryDriver, AsyncCacheModule, AsyncCacheOptions, CachedHttp } from 'angular-async-cache'; export function asyncCacheOptionsFactory(): AsyncCacheOptions { return new AsyncCacheOptions({ // Default cache driver to use. Default in memory. // You can also roll your own by implementing the CacheDriver interface driver: new LocalStorageDriver(), // this is the special sauce - first emit the data from localstorage, // then re-fetch the live data from the API and emit a second time. // The async pipe will then re-render and update the UI. Default: false fromCacheAndReplay: true }); } // declare in your module @NgModule({ imports: [ HttpClientModule, // this configures the default options. Just using `AsyncCacheModule.forRoot()` will use // the defaults of an in memory cache and not replaying from the api AsyncCacheModule.forRoot({ provide: AsyncCacheOptions, useFactory: asyncCacheOptionsFactory }) ] }) class MyModule {} // finally use with the async pipe in your components template @Component({ template: ` <div *ngFor="let car of cars | async"> {{ car.model }} </div> ` }) class MyComponent { cars: Observable<Car[]>; constructor(private cachedHttp: CachedHttp) { // only the get method is supported (as other http verbs are destructive) // The second argument can be any options you would pass to a normal http get call // The third argument is a `AsyncCacheOptions` subset this.cars = this.cachedHttp.get('/cars'); } }
2. There is also a low-level AsyncCache service that you can use to manually control the caching of notes or promises.
@Injectable() class CarService { constructor( private http: Http, private asyncCache: AsyncCache, private memoryDriver: MemoryDriver ) {} getCars(): Observable<Car[]> { const cars$: Observable<Car[]> = this.http.get('/cars'); return asyncCache.wrap(cars$, '/cars', { driver: this.memoryDriver // override the default and cache the data in memory }); } }
3. There is also a pipe that you can use to instantiate the spool in your template.
@Component({ template: ` <div *ngFor="let car of cars | asyncCache:'/cars' | async"> {{ car.model }} </div> ` }) class MyComponent { cars: Observable<Car[]>; constructor(http: Http) { this.cars = http.get('/cars'); } }
angular 4+ async cache module, angular async cache Plugin/Github, angular async promise, async observable
See Demo And Download
Official Website(mattlewis92): Click Here
This superior jQuery/javascript plugin is developed by mattlewis92. For extra advanced usage, please go to the official website.