Difficulties when importing, ... is not a function
- Dominant language
- JavaScript
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Description
#### Support plan
* *is this issue currently blocking your project?* (yes/no): no
* *is this issue affecting a production system?* (yes/no): no
#### Context
* *node version*: 18.12.1
* *module version with issue*: 17.7.0
* *last module version without issue*: idk
* *environment* (e.g. node, browser, native): node, typescript
* *used with* (e.g. hapi application, another framework, standalone, ...): nest, jest
* *any other relevant information*:
#### What are you trying to achieve or the steps to reproduce?
Using
```json
"allowSyntheticDefaultImports": false,
"esModuleInterop": true,
```
in tsconfig.json and
```ts
import Joi from 'joi';
```
causes
`node_modules/joi/lib/index"' can only be default-imported using the 'allowSyntheticDefaultImports' flag`
---
Using
```json
"allowSyntheticDefaultImports": false,
"esModuleInterop": true,
```
in tsconfig.json and
```ts
import * as Joi from 'joi';
Joi.string()
```
causes
`TypeError: Joi.string is not a function`
---
Using
```json
"allowSyntheticDefaultImports": true,
"esModuleInterop": true,
```
in tsconfig.json and
```ts
import * as Joi from 'joi';
Joi.string()
```
causes
`TypeError: Joi.string is not a function`
---
Using
```json
"allowSyntheticDefaultImports": true,
"esModuleInterop": false,
```
in tsconfig.json and
```ts
import Joi from 'joi';
Joi.string()
```
works when running `nest start --exec "node --experimental-specifier-resolution=node --no-warnings` *(we always have to use that node option, it is not related to Joi and I didn't conduct experiments on how the Joy import behaves without it)*,
but jest tests fail with
```
● Test suite failed to run
TypeError: Cannot read properties of undefined (reading 'string')
3 | import Joi from 'joi';
4 | // import * as Joi from 'joi';
> 5 | Joi.string()
```
---
Using
```json
"allowSyntheticDefaultImports": true,
"esModuleInterop": true,
```
in tsconfig.json and
```ts
import Joi from 'joi';
Joi.string()
```
works everywhere.
In our package.json we use `"type": "module"`, I don't know if this is related to the problem.
#### What was the result you got?
see above
#### What result did you expect?
For it to work like shown in the nest js docs: https://docs.nestjs.com/techniques/configuration#schema-validation, with the `* as Joi` import without having to configure anything
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Assessment
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