typescript cannot use namespace as a type

  • I have the following setup: inner/action.ts: Code: export type MyAction = string; inner/functions.ts Code: Modern code should use the ES Module syntax, as it has all the features provided by namespaces, and starting with ECMAScript 2015 it became part of the specification. Agree This avoids confusing new users by overloading them with similarly named terms. However, this is not always the case, and sometimes youll have to deal with a library that does not bundle its own type module declaration.
  • Because the consumer of a module decides what name to assign it, theres no need to proactively wrap up the exported symbols in a namespace. What is the purpose of COALESCE function? How to fix 'Cannot use namespace as a type ts(2709)' in typescript? The author selected the COVID-19 Relief Fund to receive a donation as part of the Write for DOnations program. This can add flexibility to a namespace if you need to extend it later in your code. Additionally, anywhere the module keyword was used when declaring an internal module, the namespace keyword can and should be used instead. This means that multiple declarations of the same namespace will be merged into a single declaration. Ayibatari Ibaba is a software developer with years of experience building websites and apps. You also tried out a common use case of namespaces: To provide ambient typing for external libraries that are not yet typed. See how TypeScript improves day to day working with JavaScript with minimal additional syntax. All rights reserved. to your account. Namespases can be converted to types using the typeof keyword.
    For example, If your 3rd party library looked like this: In that case, your declaration can be a little simpler.