“10 Advanced Typescript Techniques to Boost Your Coding Skills and Make You a Coding Ninja!”

Photo by Steven Binotto on Unsplash

Are you ready to take your Typescript skills to the next level? Look no further! Here are some advanced techniques to help you master Typescript:

1. Type Aliases: Type aliases allow you to create custom types for easier reference in your code. For example:

type User = {
  name: string,
  age: number,
  address: string
}

2. Interfaces: Interfaces allow you to specify the structure of an object, without the object itself being an instance of that interface.

interface User {
  name: string,
  age: number,
  address: string
}

3. Union Types: Union types allow you to specify multiple possible types for a single variable. This is useful when a variable could be multiple types, but you want to ensure it is at least one of those types.

let age: number | string = 25;
age = 'thirty';

4. Index Signatures: Index signatures allow you to specify the types of properties in an object that has a dynamic set of properties.

interface User {
  name: string,
  age: number,
  [key: string]: any
}

5. Function Overloads: Function overloads allow you to specify different types for function parameters. This is useful when a function could be called with different types of arguments.

function add(x: number, y: number): number;
function add(x: string, y: string): string;
function add(x: any, y: any): any {
  return x + y;
}

6. Higher Order Functions: Higher order functions are functions that either take a function as an argument or return a function as a result. This allows for more advanced programming techniques, such as currying and partial application.

function higherOrder(fn: (x: number) => number) {
  return (x: number) => fn(x);
}

7. Async/Await: Async/await makes it easier to work with asynchronous code in Typescript. It allows you to write asynchronous code that looks and behaves like synchronous code.

async function getUser() {
  const response = await fetch('/api/user');
  const user = await response.json();
  return user;
}

8. Generics: Generics allow you to specify the types of values a function or class can accept, without specifying a specific type. This allows for greater flexibility and reuse of code.

function genericFunction<T>(x: T): T {
  return x;
}

const result = genericFunction<string>('hello');

9. Enums: Enums allow you to define a set of named constants. This is useful for defining a fixed set of values, such as the days of the week.

enum DaysOfWeek {
  Monday,
  Tuesday,
  Wednesday,
  Thursday,
  Friday,
  Saturday,
  Sunday
}

10. Mixins: Mixins allow you to reuse a set of methods in multiple classes. This is useful for sharing common functionality between classes.

class A {
  foo() { console.log('foo'); }
}
class B {
  bar() { console.log('bar'); }
}

class C extends A, B { }
const c = new C();
c.foo(); // 'foo'
c.bar(); // 'bar'

There you have it — 10 advanced Typescript techniques to help you master the language. Don’t be afraid to experiment and try out new things — that’s the best way to learn and improve your skills. Happy coding!