Deepmerge-ts causing error on build

[fatihaziz]

So the error is this

I cannot find the related problem anywhere… then I think you maybe can help.

How to reproduce:

1. npm i deepmerge-ts@latest
2. write codes:

// lib/somefile.ts
import { deepmergeCustom } from 'deepmerge-ts'

const deepmerge = deepmergeCustom({
  mergeArrays: false,
  mergeOthers(values, utils) {
    return utils.defaultMergeFunctions.mergeOthers(values.filter(value => value !== undefined))
  },
})

export const DeepObjectMerge = <Ts extends T[], T extends Record<string, any>>(...objects: Ts) => deepmerge(...objects)

/**
 * Deep Object Plain Merge is for merging plain objects without merging methods, 
 * beware if you want to merge the class properties, use DeepObjectMerge instead
 * @param objects 
 * @returns 
 */
export const DeepObjectPlainMerge = <Ts extends T[], T extends Record<string, any>>(...objects: Ts) => {
  const plainObjects = objects.map(object => ({ ...object })) as Ts
  return deepmerge(...plainObjects)
}

// index.ts
export { DeepObjectMerge, DeepObjectPlainMerge } from 'lib/somefile.ts'

3. npm run build
4. error occurred.

Spec:

• node: 16.16.0
• rollup: 2.78
• rollup.config.ts: same as yours...
• package.json: for main, module, types, and exports, same as yours.

Do you know what causing the error?
Thank you

[RebeccaStevens]

Hey, I'll be able to have a look at this a bit later but at first glance it looks like it might be a problem with the rollup configuration. Would you be able to provide your rollup.config file?

[fatihaziz]

That's great! I will follow the update there.

[fatihaziz]

anyway, there is a simple fix for now until the PR accepted?

[RebeccaStevens]

If you are using yarn 3 or some other package manager that supports patching, you can either patch the rollup plugin or patch this library to use .d.ts instead of .d.mts.

But there isn't really any nice workaround right now.

[fatihaziz]

it seems the rollup plugin is updated today,
let me try again

[fatihaziz]

It working now