Logging with Winston or Pino in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Winston logger in a NestJS service.

NestJS

import { Logger } from '[1]';

Drag options to blanks, or click blank then click option'

Apino

Bexpress

Cnestjs/common

Dwinston

Attempts:

3 left

💡 Hint

Common Mistakes

Importing from 'nestjs/common' instead of 'winston'.

Confusing Winston with Pino or Express.

Winston is imported from the 'winston' package to use its logging features.

2fill in blank

medium

Complete the code to create a Winston logger instance with console transport.

NestJS

const logger = winston.createLogger({ transports: [new winston.transports.[1]()] });

Drag options to blanks, or click blank then click option'

AFile

BHttp

CConsole

DStream

Attempts:

3 left

💡 Hint

Common Mistakes

Using File transport when console output is needed.

Using Http or Stream transports incorrectly.

The Console transport outputs logs to the console, which is common for development.

3fill in blank

hard

Fix the error in the NestJS logger injection code.

NestJS

constructor(private readonly logger: [1]) {}

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ALogger

BConsoleLogger

CWinstonLogger

DLoggerService

Attempts:

3 left

💡 Hint

Common Mistakes

Using LoggerService instead of Logger class.

Using WinstonLogger which is not a NestJS injectable class.

In NestJS, the Logger class is used for logging and can be injected as a service.

4fill in blank

hard

Fill both blanks to configure Pino logger with pretty print and level 'debug'.

NestJS

const logger = pino({ level: '[1]', transport: { target: '[2]' } });

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Adebug

Binfo

Cpino-pretty

Dpino-http

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'info' level instead of 'debug' for detailed logs.

Using 'pino-http' which is for HTTP logging middleware.

The level 'debug' enables detailed logs. The 'pino-pretty' target formats logs nicely for console.

5fill in blank

hard

Fill all three blanks to create a Winston logger with JSON format, timestamp, and console transport.

NestJS

const logger = winston.createLogger({ format: winston.format.combine(winston.format.[2](), winston.format.[1]()), transports: [new winston.transports.[3]()] });

Drag options to blanks, or click blank then click option'

Ajson

Btimestamp

CConsole

Dcolorize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'colorize' instead of 'json' for format.

Using 'File' transport instead of 'Console' for terminal output.

Combining json format with timestamp adds time info to logs. Console transport outputs logs to terminal.