Could someone please clarify why y.length in this particular example does not result in an error?
Could someone please clarify why y.length in this particular example does not result in an error?
FolderDictionary is essentially a Record<string, Folder> where the key can be any string.
This allows you to call the length property on FolderDictionary, as well as any other string without causing a compile error.
In the second scenario with const x = {}, no type is specified so TypeScript infers it as type {}.
This inferred type does not have a length property.
However, if an explicit type is added like
const x: Record<string, string> = {}y.length will not result in a compile time error.
It's important to note that in both cases, the outcome will be undefined since the key being accessed does not exist.
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