Yes interfaces can be merged: https://www.typescriptlang.org/docs/handbook/declaration-merging.html https://www.typescriptlang.org/docs/handbook/declaration-mer

Yes interfaces can be merged: https://www.typescriptlang.org/docs/handbook/declaration-merging.html https://www.typescriptlang.org/docs/handbook/declaration-mer..., which can be useful when working with external libraries.