Using Typescript: How to Name Object Keys with Spaces

Within my globals.ts file, I've defined the following:

export const Roles = { Manager: 2, "Customer Service": 4 }
const r = Roles["Customer Service"]; // works just fine

In another file where this information is imported, I have:

import { Roles } from "./globals";
const m = Roles.Manager;  // all good
const M = Roles["Manager"]; // no issues here
const r = Roles["Customer Service"]; // encountering an error

The error message received for the last line states:

Element implicitly has an 'any' type because type '{ Manager: number; "Customer Service": number; ...' has no index signature.

Why is this limitation in place? Is there a way to reference an element with a key that includes spaces?

Answer №1

It seems that in your current code, the property is dependent on a variable that is not constant. When using noImplicitAny, this results in the same error.

let key = "Customer Service"; // type string
const r = Roles[key]; // error

To resolve this issue, you must limit key to only accept valid keys of the specified type.

let key: keyof typeof Roles = "Customer Service"; // type "Manager"|"Customer Service"
const r = Roles[key]; // ok

Alternatively, if the literal "Customer Service" matches the key type, then there should be no error.

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