What are some advanced tips for using TypeScript?

What are some advanced tips for using TypeScript?

Here are a few advanced tips for TypeScript:

1. Use Generics to create reusable components.
2. Leverage Type Guards for better type safety.
3. Explore mapped types for transforming types.
4. Utilize utility types like Partial, Pick, and Record.

Can you explain how to use Generics in TypeScript?

Sure! Generics allow you to create reusable components that can work with any data type. For example:

function identity<T>(arg: T): T {
    return arg;
}

This function can accept any type and return the same type.

What are Type Guards and how do they work?

Type Guards are techniques used to narrow down the type of a variable. You can use the typeof operator or custom type predicates. For example:

function isString(value: any): value is string {
    return typeof value === 'string';
}

Can you give an example of a mapped type?

Certainly! A mapped type allows you to create new types by transforming properties of an existing type. For example:

type Person = { name: string; age: number; };

type ReadonlyPerson = {
    readonly [K in keyof Person]: Person[K];
};