Prerequisites checklist

• I have read the contributing guidelines.

AI acknowledgment

• I did not use AI to generate this PR.
• (If the above is not checked) I have reviewed the AI-generated content before submitting.

What is the purpose of this pull request? (put an "X" next to an item)

[ ] Documentation update
[x] Bug fix (template)
[ ] New rule (template)
[ ] Changes an existing rule (template)
[ ] Add autofix to a rule
[ ] Add a CLI option
[ ] Add something to the core
[ ] Other, please explain:

Tell us about your environment (npx eslint --env-info):

• Node version: v24.16.0
• npm version: v11.13.0
• Local ESLint version: v10.6.0
• Global ESLint version: no
• Operating System: windows

What parser are you using (place an "X" next to just one item)?

[x] Default (Espree)
[ ] @typescript-eslint/parser
[ ] @babel/eslint-parser
[ ] vue-eslint-parser
[ ] @angular-eslint/template-parser
[ ] Other

Please show your full configuration:

export default [{}];

What did you do? Please include the actual source code causing the issue.

/* eslint class-methods-use-this: ["error", { "ignoreClassesWithImplements": "all" }] */

interface Base { method(): void; };

const Foo = class implements Base { method() {} };
class Bar implements Base { method() {} };

Playground

What did you expect to happen?

No report. Foo implements Base, so with ignoreClassesWithImplements: "all" the method should be ignored, exactly as it is for the equivalent class declaration.

What actually happened? Please include the actual, raw output from ESLint.

Expected 'this' to be used by class method 'method'.

What changes did you make? (Give an overview)

Updated the hasImplements helper in class-methods-use-this to also recognize ClassExpression, so the ignoreClassesWithImplements option applies to class expressions with an implements clause, matching class declarations.

Is there anything you'd like reviewers to focus on?