Learn TypeScript 3 by Building Web Applications

Re-exports and barrels

It is also possible to re-export symbols exported by other modules:

// my-module-with-reexports.ts 
export {log, Message, MessageType} from "./my-utils-module"; 

In the preceding example, we did nothing in the module apart from re-exporting the symbols of another module. This is particularly useful when defining public APIs for parts of your applications.

Finally, it is also possible to re-export everything from a module using the following syntax: export * from ...​.