TypeScript

Exporting an interface and implementation in TypeScript

TypeScriptModules & NamespacesES Modules (Export/Import)intermediate

What this snippet does

Separating interfaces from implementations in modules promotes cleaner architecture and better testability.

Expected output

1

Why practise typing this

Typing modules & namespaces 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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