Type parameters of generic javascript classes are stripped of their types

[stwlam]

Search terms

template, typeParam, class

Expected Behavior

Types of javascript class type parameters, if present, are rendered.

Actual Behavior

Types of javascript class type parameters, when present, are not rendered.

Steps to reproduce the bug

Add the following to the example/classes directory (also export from index and turn on allowJs:

/**
 * @template {number} T
 */
export class NumberManager {
     /**
      *
      * @param {T[]} nums
      */
    constructor(nums) {
        this.nums = nums;
    }

    /** @type {T[]} */
    nums;
}

Build the examples and note the lack of the number type for T in the class type parameter but not the constructor's:

Environment

• Typedoc version: 0.28.1
• TypeScript version: 5.6.3
• Node.js version: 22.14.0
• OS: Ubuntu 22.04.5

[Gerrit0]

Oh TS-JSDoc, why do you have to be so horrible... this happens because the AST for that class does not include type parameter constraints on the type parameters when getting them for the class, so typedoc is going to have to find it in some other completely inconvenient location...