January 2019
Intermediate to advanced
460 pages
10h 33m
English
Content preview from Hands-On Full-Stack Web Development with GraphQL and React
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Logging in Node.js
The most popular logging package for Node.js is called winston. Configure winston by following the steps below:
- Install winston with npm:
npm install --save winston
- We create a new folder for all of the helper functions of the back end:
mkdir src/server/helpers
- Then, insert a logger.js file in the new folder with the following content:
import winston from 'winston';let transports = [ new winston.transports.File({ filename: 'error.log', level: 'error', }), new winston.transports.File({ filename: 'combined.log', level: 'verbose', }),];if (process.env.NODE_ENV !== 'production') { transports.push(new winston.transports.Console());}const logger = winston.createLogger({ level: 'info', format: winston.format.json(), transports, ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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