Typescript module syntax

Question

In typescript, what is the difference between these two:

declare module foo { ... }

and

declare namespace foo { ... }

From the docs I get the feeling they should be the same and the second one is preferred. However I see many .d.ts files that uses the first one which makes me unsure.

Community · Accepted Answer · 2020-06-20 09:12:55Z

4

They are exactly the same. The keyword module was deprecated in favor of namespace in this case.

More

This is because module confuses the with the concept of file modules : https://basarat.gitbooks.io/typescript/content/docs/project/modules.html

edited Jun 20, 2020 at 9:12

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answered Mar 6, 2016 at 23:52

basarat

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2 Comments

Jonas Kello Over a year ago

I thought module keyword was not fully deprecated. Is it not still active in declare module "foo" { ...} (with quotation marks) for ambient modules? (maybe that is what you meant by "in this case")

basarat Over a year ago

Yes. That is what I meant with in this case 🌹

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