TypeScript

Namespace merging failing on arrow functions in TypeScript

TypeScriptNamespaces & MergingFunction Namespace Mergingadvanced

What this snippet does

Function-namespace merging only works with standard function declarations, not const arrow functions, due to how hoisting and merging occur.

Expected output

Compile Error: Namespace declaration cannot be in the same scope as a variable.

Why practise typing this

Typing namespaces & merging code builds muscle memory for the symbols and indentation TypeScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

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