Ability to remove the default condition

[regseb]

Description

The eslint-plugin-jsdoc library would need a tool to get the types defined in the exports property. resolve-import could work, but it would need to be able to remove the default condition.

Proposal

You can support negative conditions. If you want to undo a default condition, you can use the ! prefix.

export const resolveConditionalValue = (
  exp: ConditionalValue,
  options: ResolveImportOpts,
): string | null => {
  if (exp === null || typeof exp === 'string') return exp
  if (Array.isArray(exp)) {
    for (const e of exp) {
      const r = resolveConditionalValue(e, options)
      if (r) return r
    }
    return null
  }

  const conditions = new Set(['default'])
  for (const condition of options.conditions ?? ['import', 'node']) {
    if (condition.startsWith('!')) {
      conditions.delete(condition.slice(1))
    } else {
      conditions.add(condition)
    }
  }
  for (const [k, v] of Object.entries(exp)) {
    if (conditions.has(k)) {
      return resolveConditionalValue(v, options)
    }
  }
  return null
}

console.log(await resolveImport('pkg', '/path/to/y.js', { conditions: ['!default', 'types'] }));

Related links

• The original bug in eslint-plugin-jsdoc: imports-as-dependencies: package with exports instead of types gajus/eslint-plugin-jsdoc#1114
• A similar request in the abandoned resolve.exports: Excluding default from conditions lukeed/resolve.exports#30
  • An implementation of negative conditions: feat: support conditions with "!" lukeed/resolve.exports#31