NestJS code explainers

typescript

import {
  CallHandler,
  ExecutionContext,
  Injectable,

Wrapping responses in a NestJS interceptor

interceptors rxjs response-shaping

Intermediate 7 steps

typescript

import {
  CACHE_MANAGER,
  CacheInterceptor,
} from '@nestjs/cache-manager';

A tenant-aware HTTP cache in NestJS

caching interceptors multi-tenancy

Intermediate 7 steps

typescript

import { IsEmail, IsEnum, IsInt, IsOptional, IsString, Length, Max, Min } from 'class-validator';
import { Type } from 'class-transformer';
import { Body, Controller, Post } from '@nestjs/common';

How DTO validation works in NestJS

validation data-transfer-objects decorators

Intermediate 8 steps

typescript

import {
  Injectable,
  NestInterceptor,
  ExecutionContext,

How a NestJS logging interceptor works

interceptors rxjs logging

Intermediate 5 steps