Generics Development Tutorials, Guides & Insights

TypeScript allows you to define complex types using type aliases and interfaces. While both serve similar purposes, type aliases are generally more flexible and can be used to create union types, intersection types, and more.

Example:

You can use the extends keyword to constrain a generic type to a subset of types that satisfy a particular condition.

function getProperty<T, K extends keyof T>(obj: T, key: K) {
  return obj[key];
}

const person = { name: 'Alice', age: 25 };
const name = getProperty(person, 'name'); // Works
// const invalid = getProperty(person, 'invalidKey'); // Error: Argument of type '"invalidKey"' is not assignable to parameter of type '"name" | "age"'.

TypeScript's advanced type inference and type features allow you to write more robust, flexible, and maintainable code. In this tutorial, we covered:

• Intersection types
• Union types
• Conditional types
• Advanced generics
• Template literal types
• Utility types (Partial, Pick, Omit, Record)