It is common when working on a web application, comprised of a server-side Web API, running on a framework like ASP.NET or NestJS, and a client-side Single Page Application (SPA), running on a framework like Angular, to refer to the server-side as "the back-end" and to the client-side as "the front-end". I've been a culprit of this until recently.  

import { Injectable } from '@angular/core';
@Injectable({
    providedIn: 'root'
})
export class MyCoreService { }

@Injectable({
    providedIn: 'root',
    useClass: LazyFlightCancellingService,
    deps: [NgModuleFactoryLoader, Injector] 
})
export class FlightCancellingService { }

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What is the difference between ___ and ___ in the front-end development?

this-vs-that

Why TypeScript is the best way to write Front-end in 2019 

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