What are 'branded types' in TypeScript?

Description : Branded types add unique identity to a primitive type.

Answer :

Branded types in TypeScript add a unique identity to a primitive type without changing its structure. This allows you to distinguish between values of the same type but with different meanings. For example, 'type UserId = string & { readonly brand: unique symbol };' creates a 'UserId' type that behaves like a string but is not interchangeable with plain strings. Branded types enhance type safety in complex applications where you want to prevent accidental misuse of primitive values.

Branded types in TypeScript add a unique identity to a primitive type without changing its structure. This allows you to distinguish between values of the same type but with different meanings. For example, 'type UserId = string & { readonly brand: unique symbol };' creates a 'UserId' type that behaves like a string but is not interchangeable with plain strings. Branded types enhance type safety in complex applications where you want to prevent accidental misuse of primitive values.

Category : Typescript

Created Date : 9/7/2024

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What is TypeScript?

What is TypeScript?

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2024-09-09 last updatedFreeTypescript

TypeScript is a statically typed language that builds on JavaScript by adding optional types. It allows developers to catch errors at compile time rather than runtime, which can help improve code quality and readability. TypeScript code is transpiled to JavaScript, making it compatible with existing JavaScript codebases and environments.

TypeScript is a statically typed language that builds on JavaScript by adding optional types. It allows developers to catch errors at compile time rather than runtime, which can help improve code quality and readability. TypeScript code is transpiled to JavaScript, making it compatible with existing JavaScript codebases and environments.

TypeScript is a statically typed language that builds on JavaScript by adding optional types. It allows developers to catch errors at compile time rather than runtime, which can help improve code quality and readability. TypeScript code is transpiled to JavaScript, making it compatible with existing JavaScript codebases and environments.

TypeScript is a statically typed language that builds on JavaScript by adding optional types. It allows developers to catch errors at compile time rather than runtime, which can help improve code quality and readability. TypeScript code is transpiled to JavaScript, making it compatible with existing JavaScript codebases and environments.