type.all(converter, Type)

Create a new type that inherits the same properties of Type, but with each property run through the converter function. The converter function should be one of check, maybe, convert, or maybeConvert.

import { ObservableObject, Reflect, type } from "can/everything";

class Person extends ObservableObject {
  static props = {
    age: Number
  }
}

// Age is a strict number.

let person = new Person();
try {
    person.age = "13";
} catch(err) {
  console.log("Oops, tried to convert a strict type.");
}

let ConvertingPerson = type.all(type.convert, Person);
person = Reflect.new(Person);
person.age = "13";
console.log("Age is", person.age); // logs 13