Pick

declare global {
  interface Todo extends TimeStampModel {
    id: string;
    content: string;
    order: number;
    done: boolean;
    userId?: string;
    groupId?: string;
  }
}

type TodoCreateInterface = Pick<Todo, 'content'>;

The Pick utility type in TypeScript is used to create a new type by selecting only a subset of properties from an existing type. In this case, TodoCreateInterface is defined as a new type that includes only the content property from the Todo type.

Omit

interface Todo {
  id: string;
  content: string;
  order: number;
  done: boolean;
  userId?: string;
  groupId?: string;
}

type TodoCreateInterface = Omit<Todo, 'content'>;

const newTodo: TodoCreateInterface = {
  id: '1',
  order: 1,
  done: false,
  userId: 'user1',
  groupId: 'group1',
};

In this example, the Omit utility type is used to create a new type called TodoCreateInterface that has all the properties of the Todo interface except for the content property.