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DonateAdvanced TypeScript Topics: Generics and Conditional Types
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Learn about advanced TypeScript topics such as generics and conditional types to take your skills to the next level.
Introduction to Generics
Generics in TypeScript allow you to create reusable functions and classes that can work with multiple types. Here's an example of how to define a generic function:
function identity<T>(arg: T): T {
return arg;
}
Using Generics
You can use generics to create reusable classes and interfaces:
class Container<T> {
private value: T;
constructor(value: T) {
this.value = value;
}
getValue(): T {
return this.value;
}
}
Introduction to Conditional Types
Conditional types in TypeScript allow you to make decisions based on types at compile-time. Here's an example of how to define a conditional type:
type IsString<T> = T extends string ? true : false;
Using Conditional Types
You can use conditional types to create more expressive and flexible types:
type GetType<T> = T extends string ? string : T extends number ? number : unknown;
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