Define an object type in Typescript that includes both specified properties and an unlimited number of unspecified properties

I'm attempting to create a custom data type using the code below, but it's not working:

type CustomDataType {
  [key: string]: CustomDataType;
  isValid: boolean;
  errors?: string[];
}

My goal is to have a CustomDataType with an isValid property as a boolean, an errors property as an array of strings, and any additional properties that are also CustomDataTypes.

Does anyone know the correct syntax for achieving this?

Answer №1

class B {
  isActive: boolean;
}

type Custom = B & Record<string, StatusCheck>;

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