fix(file-extension-in-import): handle files with dots in basename#506
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aladdin-add merged 2 commits intoeslint-community:masterfrom Jan 13, 2026
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When importing "./utils.client" where the actual file is "utils.client.ts", path.extname() treats ".client" as an extension. The resolver falls back to the raw path, causing the rule to think currentExt === actualExt (both ".client") and report no error. Fix: when resolved filePath doesn't exist as a file, search for files matching the full import basename and use the found file's actual extension. Also handle directory imports where the directory name contains dots (e.g., "my-things.client/index.ts"). Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Created by Claude Code and reviewed by @patricktree
Fixes false negative when importing files like
./utils.clientwhere actual file isutils.client.ts.Problem
path.extname("./utils.client")returns.client, treating it as the extension. When the resolver can't find an exact match, it falls back to the raw path. The rule then seescurrentExt === actualExt(both.client) and reports no error—missing that.tsshould be required.Same issue applies to directories with dots (e.g.,
my-things.client/index.ts).Fix
When the resolved
filePathdoesn't exist as a file, search for files matching the full import basename and use the found file's actual extension.Testing
utils.client.ts,my-things.client/index.tsnpm run test:mocha tests/lib/rules/file-extension-in-import.jspasses