Direct differences

For readablility some shortcuts are applied:

• named
  • named: 'named'
• [named]
  • [named]: 'named' (non enumerable)
• default
  • default: 'default'
• [default]
  • [default]: 'default' (non enumerable)
• __esModule
  • __esModule: true
• [__esModule]
  • [__esModule]: true (non enumerable)
• [G]
  • [Getter]
• [Module]
  • [Symbol(Symbol.toStringTag)]: 'Module'

import * as x and import() are excluded from these tables as they are too different.

Rspack <-> Webpack (.mjs)

rspack-webpack	fixture	rspack	webpack
import * as x; x === await import()	default-export-esModule-esm-reexport default-export-esm named-and-default-export-esModule-esm-reexport named-and-default-export-esm named-and-default-export-esm-esm-reexport named-and-default-export-esm-reexport named-export-esm order-esm	false	true

Webpack <-> Node.js (.mjs)

When using .mjs Webpack tries to be compatible to Node.js.

webpack-node	fixture	webpack	node
import x import { default as x }	default-export-esModule-esm-reexport named-and-default-export-esModule-esm-reexport named-and-default-export-esm-esm-reexport named-and-default-export-esm-reexport named-export-esm order-esm single-string-export-esm-reexport tla-esm-esm-reexport	undefined + errors	syntax error
import x import { default as x } import { named as x } import { __esModule as x }	tla-esModule tla-esModule-esm-reexport	compilation error	syntax error
import * as x; x.default	default-export-esModule-esm-reexport named-and-default-export-esModule-esm-reexport named-and-default-export-esm-esm-reexport named-and-default-export-esm-reexport named-export-esm order-esm single-string-export-esm-reexport tla-esm-esm-reexport	undefined + errors	undefined
import * as x; x.default import * as x; ident(x).default import * as x; x.named import * as x; ident(x).named import * as x; x.__esModule import * as x; ident(x).__esModule await import() === require() import * as x; x === await import()	tla-esModule tla-esModule-esm-reexport	compilation error	runtime error
import { named as x }	default-export default-export-esModule default-export-esModule-esm-reexport default-export-esm order order-esModule order-esm	undefined + errors	syntax error
import { named as x }	default-export-runtime single-class-export single-empty-string-export single-function-export single-promise-object-export single-promise-object-with-default-export single-promise-string-export single-string-export single-string-export-defined single-string-export-duplicate single-string-export-esm-reexport single-string-export-getter single-string-export-live single-string-export-reexport	undefined	syntax error
import { named as x }	named-and-default-export-getter named-and-default-export-getter-esModule named-and-default-export-inherited named-and-default-export-non-enumerable-inherited named-and-default-export-runtime named-and-default-export-runtime-esModule named-and-null-default-export-runtime named-and-null-default-export-runtime-esModule named-export-runtime named-export-runtime-esModule single-object-export single-object-with-default-export single-object-with-default-export-duplicate single-object-with-null-default-export	'named'	syntax error
import { named as x } import * as x; x.named import * as x; ident(x).named	named-and-default-export-live	'named'	'named-outdated'
import { named as x }	single-null-export	type error	syntax error
import * as x; x.named	default-export default-export-esModule default-export-esModule-esm-reexport default-export-esm order order-esModule order-esm	undefined + errors	undefined
import * as x; x.named import * as x; ident(x).named	named-and-default-export-getter named-and-default-export-getter-esModule named-and-default-export-inherited named-and-default-export-non-enumerable-inherited named-and-default-export-runtime named-and-default-export-runtime-esModule named-and-null-default-export-runtime named-and-null-default-export-runtime-esModule named-export-runtime named-export-runtime-esModule single-object-export single-object-with-default-export single-object-with-default-export-duplicate single-object-with-null-default-export	'named'	undefined
import * as x; x.named	single-null-export	type error	undefined
import { __esModule as x }	default-export default-export-esm named-and-default-export named-and-default-export-duplicate named-and-default-export-esm named-and-default-export-esm-esm-reexport named-and-default-export-esm-reexport named-and-default-export-getter named-and-default-export-live named-and-default-export-non-enumerable named-and-default-export-reexport named-and-null-default-export named-and-null-default-export-non-enumerable named-export named-export-esm named-export-non-enumerable order order-esm require-circular require-circular-self require-conditional-execution tla-esm tla-esm-esm-reexport	true + errors	syntax error
import { __esModule as x }	default-export-runtime named-and-default-export-getter-esModule named-and-default-export-inherited named-and-default-export-non-enumerable-inherited named-and-default-export-runtime named-and-default-export-runtime-esModule named-and-null-default-export-runtime named-and-null-default-export-runtime-esModule named-export-runtime named-export-runtime-esModule single-class-export single-empty-string-export single-function-export single-null-export single-object-export single-object-with-default-export single-object-with-default-export-duplicate single-object-with-null-default-export single-promise-object-export single-promise-object-with-default-export single-promise-string-export single-string-export single-string-export-defined single-string-export-duplicate single-string-export-esm-reexport single-string-export-getter single-string-export-live single-string-export-reexport	true	syntax error
import * as x; x.__esModule	default-export default-export-esm named-and-default-export named-and-default-export-duplicate named-and-default-export-esm named-and-default-export-esm-esm-reexport named-and-default-export-esm-reexport named-and-default-export-getter named-and-default-export-live named-and-default-export-non-enumerable named-and-default-export-reexport named-and-null-default-export named-and-null-default-export-non-enumerable named-export named-export-esm named-export-non-enumerable order order-esm require-circular require-circular-self require-conditional-execution tla-esm tla-esm-esm-reexport	true + errors	undefined
import * as x; x.__esModule	default-export-runtime named-and-default-export-getter-esModule named-and-default-export-inherited named-and-default-export-non-enumerable-inherited named-and-default-export-runtime named-and-default-export-runtime-esModule named-and-null-default-export-runtime named-and-null-default-export-runtime-esModule named-export-runtime named-export-runtime-esModule single-class-export single-empty-string-export single-function-export single-null-export single-object-export single-object-with-default-export single-object-with-default-export-duplicate single-object-with-null-default-export single-promise-object-export single-promise-object-with-default-export single-promise-string-export single-string-export single-string-export-defined single-string-export-duplicate single-string-export-esm-reexport single-string-export-getter single-string-export-live single-string-export-reexport	true	undefined
import * as x; ident(x).__esModule	default-export default-export-esm default-export-runtime named-and-default-export named-and-default-export-duplicate named-and-default-export-esm named-and-default-export-esm-esm-reexport named-and-default-export-esm-reexport named-and-default-export-getter named-and-default-export-getter-esModule named-and-default-export-inherited named-and-default-export-live named-and-default-export-non-enumerable named-and-default-export-non-enumerable-inherited named-and-default-export-reexport named-and-default-export-runtime named-and-default-export-runtime-esModule named-and-null-default-export named-and-null-default-export-non-enumerable named-and-null-default-export-runtime named-and-null-default-export-runtime-esModule named-export named-export-esm named-export-non-enumerable named-export-runtime named-export-runtime-esModule order order-esm require-circular require-circular-self require-conditional-execution single-class-export single-empty-string-export single-function-export single-null-export single-object-export single-object-with-default-export single-object-with-default-export-duplicate single-object-with-null-default-export single-promise-object-export single-promise-object-with-default-export single-promise-string-export single-string-export single-string-export-defined single-string-export-duplicate single-string-export-esm-reexport single-string-export-getter single-string-export-live single-string-export-reexport tla-esm tla-esm-esm-reexport	true	undefined
x = require(); x.default x = require(); ident(x).default	default-export-esModule-esm-reexport named-and-default-export-esModule-esm-reexport named-and-default-export-esm-reexport	undefined	'default'
x = require(); x.default x = require(); ident(x).default { named } = require() x = require(); x.named x = require(); ident(x).named { __esModule } = require() x = require(); x.__esModule x = require(); ident(x).__esModule x = require()	tla-esModule tla-esModule-esm-reexport	compilation error	require(tla esm) not allowed
x = require(); x.default x = require(); ident(x).default { named } = require() x = require(); x.named x = require(); ident(x).named { __esModule } = require() x = require(); x.__esModule x = require(); ident(x).__esModule	tla-esm tla-esm-esm-reexport	undefined	require(tla esm) not allowed
{ __esModule } = require() x = require(); x.__esModule x = require(); ident(x).__esModule	named-and-default-export-esm-esm-reexport named-and-default-export-esm-reexport named-export-esm order-esm single-string-export-esm-reexport	true	undefined
x = require()	default-export-esModule-esm-reexport	{ [__esModule], [Module] }	{ [__esModule], default }
x = require()	default-export-esm	{ [__esModule], default: [G], [Module] }	[Module: null prototype] { __esModule, default, [Module] }
x = require()	named-and-default-export-esModule-esm-reexport	{ [__esModule], named: [G], [Module] }	{ [__esModule], named, default }
x = require()	named-and-default-export-esm	{ [__esModule], default: [G], named: [G], [Module] }	[Module: null prototype] { __esModule, default, named, [Module] }
x = require()	named-and-default-export-esm-esm-reexport named-export-esm	{ [__esModule], named: [G], [Module] }	[Module: null prototype] { named, [Module] }
x = require()	named-and-default-export-esm-reexport	{ [__esModule], named: [G], [Module] }	{ named, default }
x = require()	order-esm	{ [__esModule], a: [G: 'a'], b: [G: 'b'], c: [G: 'c'], [Module] }	[Module: null prototype] { a, b, c, [Module] }
x = require()	single-string-export-esm-reexport	{ '0': [G: 's'], '1': [G: 'i'], '2': [G: 'n'], '3': [G: 'g'], '4': [G: 'l'], '5': [G: 'e'], [__esModule], [Module] }	'single'
x = require()	tla-esm	Promise { { [__esModule], default: [G], named: [G], [Module] }, Symbol(webpack exports): { [__esModule], default: [G], named: [G], [Module] }, Symbol(webpack queues): { [Function (anonymous)] [length]: 1, [name]: '' } }	require(tla esm) not allowed
x = require()	tla-esm-esm-reexport	Promise { { [__esModule], named: [G], [Module] }, Symbol(webpack exports): { [__esModule], named: [G], [Module] }, Symbol(webpack queues): { [Function (anonymous)] [length]: 1, [name]: '' } }	require(tla esm) not allowed
await import() === require()	default-export-esModule default-export-esModule-esm-reexport default-export-esm named-and-default-export-babel-getter named-and-default-export-esModule named-and-default-export-esModule-duplicate named-and-default-export-esModule-esm-reexport named-and-default-export-esModule-reexport named-and-default-export-esm named-and-default-export-esm-reexport named-and-default-export-getter-esModule named-and-default-export-runtime-esModule named-and-null-default-export-esModule named-and-null-default-export-runtime-esModule named-export-esModule named-export-runtime-esModule order-esModule single-string-export-esm-reexport	true	false
await import() === require()	tla-esm tla-esm-esm-reexport	false	require(tla esm) not allowed
import * as x; x === await import()	default-export default-export-esModule default-export-runtime named-and-default-export named-and-default-export-babel-getter named-and-default-export-duplicate named-and-default-export-esModule named-and-default-export-esModule-duplicate named-and-default-export-esModule-reexport named-and-default-export-getter named-and-default-export-getter-esModule named-and-default-export-inherited named-and-default-export-live named-and-default-export-non-enumerable named-and-default-export-non-enumerable-inherited named-and-default-export-reexport named-and-default-export-runtime named-and-default-export-runtime-esModule named-and-null-default-export named-and-null-default-export-esModule named-and-null-default-export-non-enumerable named-and-null-default-export-runtime named-and-null-default-export-runtime-esModule named-export named-export-esModule named-export-non-enumerable named-export-runtime named-export-runtime-esModule order order-esModule require-circular require-circular-self require-conditional-execution single-class-export single-empty-string-export single-function-export single-null-export single-object-export single-object-with-default-export single-object-with-default-export-duplicate single-object-with-null-default-export single-promise-object-export single-promise-object-with-default-export single-promise-string-export single-string-export single-string-export-defined single-string-export-duplicate single-string-export-getter single-string-export-live single-string-export-reexport	false	true