About Me

• Role: Automation QA Engineer 
  

• Team: Android Platform Team (Frontend)

• Company: Shopee Singapore Pte. Ltd.

Background

• Asynchronous, event-driven JavaScript runtime
• Based on Chrome's V8 engine
• Developed by Ryan Dahl in 2009 at Joyent Inc
• GitHub stats:
  • No.of stars: 84.6k (35th most popular)
  • No.of watchers: 2.9k
  • No.of forks: 22.5k (Top 100)

Table of Contents

Basics

• Asynchronous:
  • Instructions are executed out of order, not step-by-step (sequentially)
• Concurrent:
  • Software can do more than one thing at a time
• Event-driven:
  • Maintains an event queue
  • Uses event loop mechanism: loop until there is a event for the queue to process

Types of Node.js apps

1. Internet of Things (e.g. Siemens smart grid)
2. Real-Time Chat Applications (e.g. Electron)
3. Single Page Applications (e.g. Netflix, LinkedIn)
4. Real-Time Collaboration Tools (e.g. Slack, Trello)
5. Streaming Apps (e.g. Salesforce)
6. Microservices (e.g. Paypal financial system)

Walkthrough

GitHub Source Code

Deno

• Also developed by Ryan Dahl
• Presented as an alternative to Node
  • Runs Typescript - a version of JavaScript with optional static typing
  • Uses a simpler module system without package.json, index.js, local node_modules etc.
  • Single executable instead of a whole package management system (NPM)
  • In built support for key JavaScript features like promises and top level await
• Mastery with Node -> Try out Deno

References

1. Node docs

2. Node Source code

3. Types of Node.js apps

4. Deno docs

5. Deno Source Code

6. Build a Telegram Bot in Node

7. Telegram Bots API

Extra Stuff (Non-JavaScript)

1. Learning How To Learn: MOOC taught by Barbara Oakley (avaliable on Coursera)

2. 80000 Hours: Great resource for Effective Altruism, how you can make a greater impact in the world

3. Ladder: Online community to support students in their professional journey

4. Wordpress: Most widely used platform to host websites - no web dev experience required