Enum ModuleKind 

#[repr(u8)]
pub enum ModuleKind {
    None = 0,
    CommonJS = 1,
    AMD = 2,
    UMD = 3,
    System = 4,
    ES2015 = 5,
    ES2020 = 6,
    ES2022 = 7,
    ESNext = 99,
    Node16 = 100,
    NodeNext = 199,
    Preserve = 200,
}

Module system kind.

Determines how modules are resolved and emitted in the output.

Variants

None = 0

No module system (script mode)

CommonJS = 1

CommonJS (Node.js style)

AMD = 2

Asynchronous Module Definition (RequireJS style)

UMD = 3

Universal Module Definition

System = 4

SystemJS

ES2015 = 5

ES2015 modules (import/export)

ES2020 = 6

ES2020 modules with dynamic import()

ES2022 = 7

ES2022 modules with top-level await

ESNext = 99

Latest module features

Node16 = 100

Node.js ESM (package.json “type”: “module”)

NodeNext = 199

Node.js with automatic detection

Preserve = 200

Preserve original import/export syntax (let bundler handle it)

Implementations

impl ModuleKind

pub const fn is_commonjs(self) -> bool

Check if this is a CommonJS-like module system

pub const fn is_es_module(self) -> bool

Check if this uses ES modules (import/export)

Returns true only for pure ES module systems where export = is forbidden. Node16/NodeNext are hybrid systems that support both CommonJS and ESM, so they return false here (the checker must use file extension to decide).

Trait Implementations

impl Clone for ModuleKind

fn clone(&self) -> ModuleKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ModuleKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ModuleKind

fn default() -> ModuleKind

Returns the “default value” for a type.

impl PartialEq for ModuleKind

fn eq(&self, other: &ModuleKind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ModuleKind

impl Eq for ModuleKind

impl StructuralPartialEq for ModuleKind