Support for Eslint v9 Flat Config format

[skyclouds2001]

Here's what I did

config as follows in eslint.config.js

// eslint.config.js
import standard from 'eslint-config-standard'

export default [
  standard,
  // ...
]

this will report:

ConfigError: Config (unnamed): Key "parserOptions": This appears to be in eslintrc format rather than flat config format.

What I expected to happen

should use as above without reporting error

What seems to have happened

it seems that currently eslint-config-standard does not support for flat config format, is there any plan to migrate to flat config format in the future?

[skyclouds2001]

I read https://eslint.org/docs/latest/use/configure/migration-guide#using-eslintrc-configs-in-flat-config and confirmed this way can resolve this issue at present:

import path from 'node:path'
import url from 'node:url'
import { FlatCompat } from '@eslint/eslintrc'

export default [
  ...(new FlatCompat({
    baseDirectory: path.dirname(url.fileURLToPath(import.meta.url)),
  }).extends('eslint-config-standard')),
  // ...
]

[skyclouds2001]

another solution is:

import path from 'node:path'
import url from 'node:url'
import { FlatCompat } from '@eslint/eslintrc'

export default [
  ...(new FlatCompat({
    baseDirectory: path.dirname(url.fileURLToPath(import.meta.url)),
  }).config({
    extends: [
      'eslint-config-standard',
    ],
  })),
  // ...
]

[53v3n3d4]

This also works

import { FlatCompat } from '@eslint/eslintrc'

const compat = new FlatCompat()

export default [
  // standard,
  ...compat.extends('eslint-config-standard'),