TypeScript

Namespace import failing without esModuleInterop in TypeScript

TypeScriptAdvanced ModulesCommonJS Interopadvanced

What this snippet does

Without esModuleInterop, namespace imports of CommonJS modules cannot be called directly; you must use the .default property.

Expected output

Compile Error: This expression is not callable.

Why practise typing this

Typing advanced modules 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.

More TypeScript practice

Browse all TypeScript snippets →