Typescript `enum` from JSON string

Question

Is there any way to have a TypeScript enum compatible with strings from JSON?

For example:

enum Type { NEW, OLD }

interface Thing { type: Type }

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Answer 1

but the type annotation string is way too broad and error prone.

Agreed. One quick workaround (if you have the luxury of code generation you can automate this):

interface Thing { type: "NEW" | "OLD" }

These are called string literals in a union. More : https://basarat.gitbooks.io/typescript/content/docs/tips/stringEnums.html