Why I set env: { node: false }, but usage of __filename is still allowed?

[lovetingyuan]

Tell us about your environment

• ESLint Version: v7.32.0
• Node Version: v16.4.0
• npm Version: 7.18.1
• Operating System: mac os

What parser (default, @babel/eslint-parser, @typescript-eslint/parser, etc.) are you using?
@typescript-eslint/parser

Please show your full configuration:

Configuration

'vue2': {
      env: {
        browser: true,
        es2020: true,
        node: false,
      },
      parserOptions: {
        ecmaVersion: 2020,
        ecmaFeatures: {
          jsx: true,
          legacyDecorators: false
        },
      },
}

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

What did you expect to happen?

What actually happened? Please copy-paste the actual, raw output from ESLint.

Steps to reproduce this issue:

Are you willing to submit a pull request to fix this bug?

[eslint-github-bot[bot]]

Hi @lovetingyuan, thanks for the issue. It looks like there's not enough information for us to know how to help you.

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If it's something else, please just provide as much additional information as possible. Thanks!

[nzakas]

__filename is a valid JavaScript variable so it is allowed in all environments.

[ljharb]

I would, however, expect no-undef to warn on it in a non-node environment, and not to in a node environment (i haven't checked whether this is the case)

[lovetingyuan]

Oh, I found if I use "overrides", the outer "env" option will not work. So I have to set "env" inside override config.

[ljharb]

Overrides should merge env values upwards with the root config in the file.

[lovetingyuan]

Yes, I thought as you said, but the actual result is not in my case.

[ljharb]

That seems like a bug then - could you file an issue?

[lovetingyuan]

It is my mistake, the env options work well. There is no problem