How to use the never type in Typescript

This article will explain in detail how to use the never type in Typescript. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Never

Never is a subtype of other types, including null and undefined, and can be assigned to any type, representing a value that never appears

But no type is a subtype of never, which means that variables of life never can only be assigned by the never type.

The never type is generally used to specify which exceptions are always thrown, an infinite loop

Let a _ function returned must have an unreachable destination function error (message:string): never {thorw new Error (message). } this is the end of the article on "how to use never types in Typescript". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.