Error [ERR_REQUIRE_ESM]: require() of ES Module NodeJS

[danyhiol]

I am getting the following error when using NodeJS: Error [ERR_REQUIRE_ESM]: require() of ES Module path\node_modules\mongo-object\dist\index.js from path\node_modules\simpl-schema\dist\cjs\clean.js not supported.

This happens when I try to pass SimpleSchema as a class constructor property:

...
import type SimpleSchema from 'simpl-schema'; 
...

class Myclass {
  private simpleschema: typeof SimpleSchema;
  ...
  contructor({ schema: typeof SimpleSchema }){
    this.simpleschema = schema;
  }
  ...
}

somewhere in my code:

...
import SimpleSchema from 'simpl-schema'; 
...

const do = new MyClass({ 
  schema: SimpleSchema // <- here is where the error occurs
}); 

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[slowdownitsfine]

same issue here in a meteor project where I use the native mongo driver in parallel to the meteor one.

[jtarvainen]

I also have this issue in a Meteor project.

[aldeed]

In the issue description, it seems like you would not want to do both import type and typeof. Did you try with just import SimpleSchema?

That problem may be unrelated to the error, though. It seems as though all reports are in Meteor apps? Maybe there is some extra config necessary to tell Meteor how to import this properly (commonjs vs ESM)

[aldeed]

While debugging another issue, I think I have more insight into this one. simpl-schema is published with support for either esm or cjs, but mongo-object is esm-only. So this error happens when Node.js tries to go from cjs in simpl-schema to esm in mongo-object. Since I also maintain mongo-object, I'll resolve this by publishing that package with support for both, same as this package.

[aldeed]

Should be fixed in 3.4.1