Generic variables need a typedef so that they they can be used to create .d.ts file

[FranzZemen]

When defining a type using generics, the generic variables need a typedef. Other

typescript source:

export type NeverType<T, Type> = T extends Type ? never : T;

javascript input:

/** @typedef {T extends Type ? never : T} NeverType */  // No typedef for T or Type causes an error when generate ts from js 

typescript definition re-generated (using allowJs) to .d.ts

export type NeverType = T extends Type ? never : T;

Adding the following to the javascript output solves the error (there may be other ways, not a JSDoc expert)

/** @typedef {any} T */
/** @typedef {any} Type */