Node.js - NestJS support


NestJS is a framework for building Node.js server-side applications. NestJS provides a level of abstraction above many common Node.js frameworks. The following features provided by NestJS are supported:


A controller’s purpose is to receive specific requests for the application. A controller is defined using a classe@ and decorators.

The analysis of the following code will create a Node.js Get Operation named cats/all/ with a call link from the operation to the handler method findAll. The URL corresponds to the concatenation of the argument of the @Controller decorator with that of the @Get decorator of the method. The decorator of each method defines the type of the operation.

import { Controller, Get } from '@nestjs/common';

export class CatsController {
  findAll(): string {
    return 'This action returns all cats';


Middleware is a function that is called before the route handler. For instance, in the following source code, the logger function will be called before each handler of the CatsController. Our analyzer will create a callLink between the operations defined in the CatsController and the logger.

import { Module, NestModule, MiddlewareConsumer } from '@nestjs/common';
export function logger(req: Request, res: Response, next: Function) {

  imports: [CatsModule],
export class AppModule implements NestModule {
  configure(consumer: MiddlewareConsumer) {

HTTP module

NestJS allows performing http requests using the HTTP module. The analysis of the following source code will create a Node.js Get HttpRequest named foo/path/ with a call link from the findAll method to that request:

import { HttpService, Injectable, Logger } from '@nestjs/common';

export class CatsService {
  constructor(private httpService: HttpService) {}

  findAll(): Observable<AxiosResponse<Cat[]>> {
    return this.httpService.get('foo/path');

Known limitations

All NestJS features which are not documented here are not supported.