Im trying to define a pure class based mixin function, but I cannot get the type signature right for this one.

The intent is to provide a function that accepts any Class A as parameter and returns a new Class B that extends the original Class A.

export function mixin<A>(myclass: A) {
  return class B extends A {
    newMethod() {
      //stuff
    }
  }
}

As I said, I cannot figure this out.

• I need a way to express that A needs to be a class.
• I also need to express the return type, which yields several errors, among:

error TS4060: Return type of exported function has or is using private name 'B'.

Additional information:

• This is inside a utils.ts module that is exported so that other modules can use it
• This is all being worked in the context of a library I am writing

Im trying to define a pure class based mixin function, but I cannot get the type signature right for this one.

The intent is to provide a function that accepts any Class A as parameter and returns a new Class B that extends the original Class A.

export function mixin<A>(myclass: A) {
  return class B extends A {
    newMethod() {
      //stuff
    }
  }
}

As I said, I cannot figure this out.

• I need a way to express that A needs to be a class.

• I also need to express the return type, which yields several errors, among:

  error TS4060: Return type of exported function has or is using private name 'B'.

Additional information:

• This is inside a utils.ts module that is exported so that other modules can use it
• This is all being worked in the context of a library I am writing

Im trying to define a pure class based mixin function, but I cannot get the type signature right for this one.

The intent is to provide a function that accepts any Class A as parameter and returns a new Class B that extends the original Class A.

function mixin<A>(myclass: A) {
  return class B extends A {
    newMethod() {
      //stuff
    }
  }
}

As I said, I cannot figure this out.

• I need a way to express that A needs to be a class.
• I also need to express the return type, which yields several errors, among:

error TS4060: Return type of exported function has or is using private name 'B'.

Im trying to define a pure class based mixin function, but I cannot get the type signature right for this one.

The intent is to provide a function that accepts any Class A as parameter and returns a new Class B that extends the original Class A.

export function mixin<A>(myclass: A) {
  return class B extends A {
    newMethod() {
      //stuff
    }
  }
}

As I said, I cannot figure this out.

• I need a way to express that A needs to be a class.
• I also need to express the return type, which yields several errors, among:

error TS4060: Return type of exported function has or is using private name 'B'.

Additional information:

• This is inside a utils.ts module that is exported so that other modules can use it
• This is all being worked in the context of a library I am writing