TypeScript

Creating an immutable configuration object in TypeScript

TypeScriptUtility TypesReadonlyintermediate

What this snippet does

Applying Readonly ensures configuration objects cannot be accidentally mutated during application runtime.

Expected output

80

Why practise typing this

Typing utility types 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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