How to Reverse map a Enum value in Typescript

Question

I'm using typescript 3.7 Given

enum InformationSection {
  Education = 'Education label',
  Resume = 'Resume label'
}

the code

InformationSection["Education"]

returns 'Education label' and it's a valid statement but if I write

Object.keys(InformationSection).map(x => InformationSection[x])

then I get the following error:

Property 'Education label' does not exist on type 'typeof InformationSection'

what's wrong here?

Does this answer your question? Is there a simple way to get a list of keys/numbers from enum in typescript? — Gonzalo.-
– Gonzalo.-, Commented Dec 13, 2019 at 18:06
What, specifically, is not the same scenario? The Object.keys(...)... line results in a different error from the one you mention and produces an array, not a reverse map. — jcalz
– jcalz, Commented Dec 13, 2019 at 18:21
Possible duplicate of TypeScript: Object.keys return string[] — jcalz
– jcalz, Commented Dec 13, 2019 at 18:23

Pato Loco · Accepted Answer · 2019-12-13 18:11:45Z

0

The only way that I found is to trick typescript to make it stop complain about the invalid index type

(InformationSection as any)[x]

answered Dec 13, 2019 at 18:11

Pato Loco

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1 Comment

Any better approach?

treatycity · Accepted Answer · 2022-04-14 11:20:11Z

0

Object.keys(InformationSection).map(x => InformationSection[x keyof typeof InformationSection])

answered Apr 14, 2022 at 11:20

treatycity

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