enum member key should reject computed string

[fisker]

🔎 Search Terms

enum, computed, member key, string

🕗 Version & Regression Information

This is the behavior in every version I tried.

⏯ Playground Link

https://www.typescriptlang.org/play/?ts=5.9.0-dev.20250608#code/KYOwrgtgBAYg9nKBvAsAKClA2gcgII4C6UAvFAIzoC+6QA

💻 Code

enum Foo {
  ['A'] = 1
}

🙁 Actual behavior

"use strict";
var Foo;
(function (Foo) {
    Foo[Foo['A'] = 1] = 'A';
})(Foo || (Foo = {}));

🙂 Expected behavior

When using

enum Foo {
  [A] = 1
}

it emits error

Computed property names are not allowed in enums.

Should we forbid computed strings as well?

Additional information about the issue

typescript-eslint/typescript-eslint#11232 (comment)

[MartinJohns]

Duplicate of #42468.

[typescript-bot]

This issue has been marked as "Duplicate" and has seen no recent activity. It has been automatically closed for house-keeping purposes.