What this snippet does
Literal types restrict a variable to exact values, acting like a type-safe enum.
Expected output
left
Why practise typing this
Typing union and intersection 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.
More TypeScript practice
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- Creating an impossible type intersectionUnion and Intersection Types · beginner