Default character set to apply when exchanging raw data with the JS VM. Defaults to UTF-8. UTF-8 and UTF-32 are explicitly supported; other support may vary.

defaultLocale

var defaultLocale: Locale

Default locale to apply to the JS VM. Defaults to the system default.

esm

var esm: Boolean

Whether to enable ESM support.

executable

var executable: String?

executableList

var executableList: List<String>?

interactive

var interactive: Boolean

Whether to run the JS interpreter in interactive shell mode.

language

var language: JavaScriptVersion

ECMA Script language level to apply within the VM; defaults to JavaScriptVersion.ES2022.

locale

var locale: Locale

Locale to use for embedded JS VMs.

resourcesPath

var resourcesPath: String?

sourceMaps

var sourceMaps: Boolean

Whether to enable source-maps support, which enhances stack-traces, logs, and other system features.

timezone

var timezone: ZoneId

Default timezone to apply to the JS VM. Defaults to the system default.

typescript

var typescript: Boolean

Enable experimental built-in runtime support for TypeScript. Defaults to false.

var v8: Boolean

Whether to enable V8 compatibility mode.

wasm

var wasm: Boolean

Enable WASM support and related bindings. Defaults to true; only active where supported.

Functions

bindings

fun bindings(block: MutableMap<String, Any>.() -> Unit)

builtinModules

fun builtinModules(config: JavaScriptConfig.BuiltInModulesConfig.() -> Unit)

Configure builtin module replacements.

experimental

fun experimental(config: JavaScriptConfig.LabsConfig.() -> Unit)

Configure experimental options.

npm

fun npm(config: JavaScriptConfig.NpmConfig.() -> Unit)

Configure NPM support.