Export enum as "object as const"

[jsskeen-utah]

In the Handbook: https://www.typescriptlang.org/docs/handbook/enums.html#objects-vs-enums

In modern TypeScript, you may not need an enum when an object with as const could suffice:

 const enum EDirection {
   Up,
   Down,
   Left,
   Right,
}
  
const ODirection = {
   Up: 0,
   Down: 1,
   Left: 2,
   Right: 3,
 } as const;
 
EDirection.Up;
           
(enum member) EDirection.Up = 0
 
ODirection.Up;
           
(property) Up: 0
 
// Using the enum as a parameter
function walk(dir: EDirection) {}
 
// It requires an extra line to pull out the values
type Direction = typeof ODirection[keyof typeof ODirection];
function run(dir: Direction) {}
 
walk(EDirection.Left);
run(ODirection.Right);

The biggest argument in favour of this format over TypeScript’s enum is that it keeps your codebase aligned with the state of JavaScript, and when/if enums are added to JavaScript then you can move to the additional syntax.

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With NodeJS able to run TypeScript as long as you don't use things that are not real in JavaScript, it would be nice to support outputting enums as const objects.