import-js/eslint-plugin-import

[no-duplicates] incorrect report on two non-combinable ts type import statements

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#2,007 opened on Mar 14, 2021

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Description

import type ESLint from 'eslint'
import type { Linter, SourceCode } from 'eslint'

If I merge them into one statement:

import type ESLint, { Linter, SourceCode } from 'eslint'

TS will fail to compile

packages/eslint-plugin-mdx/src/processors/options.ts:5:8 - error TS1363: A type-only import can specify a default import or named bindings, but not both.

5 import type ESLint, { Linter, SourceCode } from 'eslint'

Contributor guide

Research direction
Investigate the no duplicates rule's logic to detect when two type only import statements cannot be merged due to TypeScript's restriction that a type only import cannot have both a default and named bindings.
Tech stack
typescriptjavascript
Domain
tooling
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
TypeScriptESLint
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70