A namespace can span in multiple files. Why are there two different pronunciations for the word Tee? Toggle some bits and get an actual square. You might get this error if what you want to import is a valid interface/type inside of a 3rd party namespace. We generally allow this when the two declarations do not share a meaning (i.e., Leaving the @ts-ignore actually masked the error which has been introduced with this PR, which have the effect of considering all icon sets as any, as TS cannot understand the I checked the issues at @hapi/boom and they included types in 7.x release which were breaking typescript build. It will lead you through code samples of declaring and merging namespaces, how namespaces work as JavaScript code under the hood, and how they can be used to declare types for external libraries without typing. In the example below, users can see that we can assign the number value to the var1 as the number type overrides the never type. You do not need to provide the implementation here, just the type information itself. This makes namespaces a very simple construct to use. The above StringUtility.ts file includes the namespace StringUtility which includes two simple string functions. So I'm considering only supporting isolatedModules: true and writing a single-threaded compiler for those `namespace`s. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. TS seems to really care about the extension when it is a React component. This was very confusing to me so I'd add a +1 for a better error message if possible, I had to delete the declare module "mymodule" line and then it worked. If a specific file could not be found, then the compiler will look for an ambient module declaration. Required fields are marked *.