Class extending array generates inarguable warning

[chiptumor]

Search terms

warning, warnings, 2 warnings, class, extend, extends, array, reduce, reduceRight, param, @param, initialValue, unused, core, javascript, js, typescript, ts

Expected Behavior

TypeDoc should generate documentation on classes that extend Array without generating warnings not regarding user error.

Actual Behavior

TypeDoc generates two warnings for each class that extends an array, claiming that each of the inherited methods reduce and reduceRight have an unused parameter with the name initialValue.

As it's only a warning, compilation however continues as normal.

Steps to reproduce the bug

From my demo repo:

• ./index.ts:

  export { Posts, type Post } from "./posts";

• ./posts.ts:

  /** A post found on the main site. */
  export class Post { /* ... */ }
  
  /** An array of posts fetched from the main site. */
  export class Posts extends Array<Post> { /* ... */ }

[warning] The signature Posts.reduce has an @param with name "initialValue", which was not used
[warning] The signature Posts.reduceRight has an @param with name "initialValue", which was not used
[info] html generated at ./docs
[warning] Found 0 errors and 2 warnings

• Workflow proof
• Resulting docs

Environment

• TypeDoc version: 0.28.16
• TypeScript version: 5.9.3
• Node.js version: 22.17.0
• OS: Windows 11 v24H2