Bitovi

late

Define a function that returns a type.

`type.late(fn)`

Given a function, returns a TypeObject that will unwrap to the underlying type provided within fn.

import { ObservableObject, type } from "can";

class Faves extends ObservableObject {
  static props = {
    faves: type.late(() => type.convert(Faves))
  }
}

let faves = new Faves({
  faves: {}
});

console.log("faves.faves is a Faves?", faves.faves instanceof Faves);

Parameters

fn {function}:
A function that when called returns a TypeObject.

Returns

{TypeObject}:

A TypeObject that also includes a can.unwrapType symbol that returns the underlying TypeObject.

Use

type.late provides a way to define types when a binding is not immediately available. This could be because:

You have cyclical types, such that A has a property for B and B has a property for A.
You have a type with a property whos type is itself.

In both of these cases, type.late provides a way to define the underlying type.