jsgen: cannot create maps with enum keys

[gchumillas]

Describe the bug

Cannot create maps with enum keys.

Reproduction Steps

Write a small main.v app:

enum Colors {
	red
	green
	blue
}

fn main() {
	_ := {
		Colors.red: 'red'
		.green: 'green'
		.blue: 'blue'
	}
}

Transpile to JS and execute it:

v -b js main.v
node main.js

It outputs the following tautology:

undefined is not a function (amen)

Expected Behavior

It should work.

Current Behavior

It doesn't work.

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.10 a5f400e

Environment details (OS name and version, etc.)

V full version	V 0.4.10 566d22a.a5f400e
OS	macos, macOS, 15.5, 24F74
Processor	8 cpus, 64bit, little endian, Apple M1 Pro
Memory	0.22GB/16GB
V executable	/Users/gonzalo/Projects/Personal/v/vlang/v
V last modified time	2025-06-08 09:23:28
V home dir	OK, value: /Users/gonzalo/Projects/Personal/v/vlang
VMODULES	OK, value: /Users/gonzalo/.vmodules
VTMP	OK, value: /tmp/v_501
Current working dir	OK, value: /Users/gonzalo/Projects/Personal/v/vlang
Git version	git version 2.39.1
V git status	weekly.2025.23-14-ga5f400ee
.git/config present	true
cc version	Apple clang version 17.0.0 (clang-1700.0.13.5)
gcc version	Apple clang version 17.0.0 (clang-1700.0.13.5)
clang version	Apple clang version 17.0.0 (clang-1700.0.13.5)
tcc version	tcc version 0.9.28rc 2024-02-05 HEAD@105d70f7 (AArch64 Darwin)
tcc git status	thirdparty-macos-arm64 e447816
emcc version	N/A
glibc version	N/A

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[huly-for-github]

Connected to Huly®: V_0.6-23028