Jiti not fully importing esm module when default export is a Promise #400
Description
Environment
Node v22.17.0
ESLint v9.35.0
Jiti v2.5.1
Reproduction
Import with jiti
Create two files :
// withoutPromise.js
export const foo = () => 'foo'
export const bar = 'bar'
export default foo()// withPromise.js
export const foo = async () => 'foo'
export const bar = 'bar'
export default foo()Import and debug them with jiti :
// reproduction.js
import { createJiti } from 'jiti'
const jiti = createJiti(import.meta.url, {
moduleCache: false,
})
const configA = await jiti.import('./withoutPromise.js')
console.log(configA)
const configB = await jiti.import('./withPromise.js')
console.log(configB)Result :
# node reproduction.js
[Module: null prototype] {
bar: 'bar',
default: 'foo',
foo: [Function: foo]
}
fooExpected :
[Module: null prototype] {
bar: 'bar',
default: 'foo',
foo: [Function: foo]
}
[Module: null prototype] {
bar: 'bar',
default: Promise { 'foo' },
foo: [AsyncFunction: foo]
}Classic import with Node
// works.js
import { default as _default, foo, bar } from './withPromise.js'
console.log(bar)
console.log(_default)
console.log(foo)Result :
# node works.js
bar
Promise { 'foo' }
[AsyncFunction: foo]Describe the bug
jiti is failing to fully import a module when the default exported value is a promise.
I figured out this when trying to export something else in my module aside @antfu ESLint config (which main function antfu results in a promise) :
// config.js
import { antfu } from '@antfu/eslint-config'
export const foo = 'foo'
export default antfu(/* options */)// reproduction.js
import { createJiti } from 'jiti'
const jiti = createJiti(import.meta.url, {
moduleCache: false,
})
const config = await jiti.import('./config.js')
console.log(config.foo)# Result
undefinedAdditional context
Maybe #388 is related
I tried to hack ESLint config loader to force interopDefault to false, it make named export working but break default.
So my guess is that is has to do with jiti interopDefault implementation.
I inspected
Lines 116 to 119 in cdb86cb
export default therefore def = mod.default is defined, so defIsNil if falsy.