Record inheritance in Typescript?

I were struggling with converting a model of ours to a Immutable.Map and found Record, which is perfect because we need to implement some functions.

But It doesn’t seem to be possible to use the example syntax i Typescript?

import Immutable = require("immutable");

class ABRecord extends Immutable.Record({ a: 1, b: 2 }) {
    getAB() {
        return this.a + this.b;
    }
}

var myRecord = new ABRecord(b:3);
myRecord.getAB();// 4

Doesn’t compile at all, “The property ‘Record’ does not exist on value of type ‘Immutable’.” Any tips?

[paramsingh88]

Why is this closed. The problem persists.

[danielfigueiredo]

@leonuh @abergs I’ve created this library that has an interface called TypedRecord that extends from Immutable.Map and changes all return types to the generic provided type. It has a function called makeTypedFactory that will create Immutable.Record of the type you specify, it’s a just a utility but allows you to have typed Record all over the place and is a very very small library. https://github.com/rangle/typed-immutable-record