5 Minutes or Less: TypeScript/JavaScript patterns and features

Patterns and features of TypeScript and JavaScript, demystified in less than 5 minutes each

This is a collection of briefly presented concepts, features, and patterns that I find interesting in TS/JS.

Five Minutes or Less

• SOLID
• Design Patterns
• Refactoring

Content

Current contents:

• TypeScript 5.0 decorators
• Index signatures
• Maps and sets
• Metaprogramming (Reflect API and Proxy)
• Nullish coalescing
• Static factory function
• Utility types:
  • Exclude
  • Omit
  • Parameters
  • Partial
  • Pick
  • Required
  • Return type

Running the code

You can install the things with npm install and then just go at each file with npx ts-node src/{filename}.ts.

Or, if you're lazy, you can also copy the individual TS file's contents into the TypeScript playground if you want to avoid cloning and installing anything at all.