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I'm using TypeScript and I want to use a scoped package (e.g. @foo/bar, @babel/core, etc.) that doesn't ship its own type declarations.
I've tried to run something like
npm install @types/@foo/bar
but it doesn't seem to be available.
Is there any way to get these .d.ts for these packages into the @types scope? Is there a way to write my own scoped packages on DefinitelyTyped if I need to?
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To import a type from another file in TypeScript: Export the type from file A , e.g. export type Employee = {} . Import the type in file B as import { Employee } from './another-file'; . Use the type in file B .
The namespace is a way which is used for logical grouping of functionalities. It encapsulates the features and objects that share common relationships. It allows us to organize our code in a much cleaner way. A namespace is also known as internal modules.
TypeScript includes declaration files for all of the standardized built-in APIs available in JavaScript runtimes. This includes things like methods and properties of built-in types like string or function , top-level names like Math and Object , and their associated types.
Is there any way to get these
.d.tsfor these packages into the@typesscope?
Yes there is a way! It's just a little unintuitive.
npm doesn't permit scoped packages to contain @ in their name, so these names are mangled to use two underscores in place of the @.
So as an example, if you want to install type declarations for the package @foo/bar, you'll need to run
npm install @types/foo__bar
Is there a way to write my own scoped packages on DefinitelyTyped if I need to?
Yes! From the Definitely Typed README.md:
Types for a scoped package
@foo/barshould go intypes/foo__bar. Note the double underscore.
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