stampit-org/stampit

OOP is better with stamps: Composable object factories. News: https://twitter.com/stampit_org

Vasyl Boroviak

@koresar

At your link, scroll to bottom, click this link: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/hasInstance
That is what is being used.

We do not recommend you to use instanceof in JavaScript.

If you need to check an object - duck type it.

Also, please take a look at this picture: https://stampit.js.org/

Stamp's main task is to avoid inheritance chain.

davide-talesco

@davide-talesco

I see the fact the prototype chain is flat, but I thought Instanceof stamp was doing the duck typing for me! :smile: ! Thanks! these stamps are awesome!!

Vasyl Boroviak

@koresar

No worries mate. Happy to help!

Daniel K.

@FredyC

hey @koresar ... I had to dive into older project using stamps and I feel a bit confused right now ... I got so used to regular getters lately, but this seems is not working with stamps right? I can only use more verbose property descriptors

const PaymentRequest = compose(
    Storage,
    {
        init(request) {
            this.request = request
        },
        props: {
            get accountId() {
                return this.request.x_account_id
            },
        }
    }
)

this kinda fails upon composition because Object.assign apparently tries to evaluate those getters right away

Vasyl Boroviak

@koresar

@FredyC Geters and setters are functions, so I recommend to put them to "methods".
If that's not going to work for you then I am looking forward to hearing your suggestions. What should we do?

Daniel K.

@FredyC

yea, it's not working either, because methods are assigned as well ... I am not entirely sure if it's possible to copy getter to a different object, I am surprised it's even executed at this point
I guess don't worry about it, I've used ugly descriptors for now

Vasyl Boroviak

@koresar

I want to fix that. I saw people having getters and setters.

Ivan Vlatković

@ivandotv

stampit looks great, what is the status on the typescript integration?

Daniel K.

@FredyC

@ivandotv I don't think there is any active development for stampit anymore, I might be wrong ... yea I stopped it using because of lack of TS, it's definitely non-trivial thing to do with such dynamic objects

Ivan Vlatković

@ivandotv

@FredyC The library looks great, I starred it a long time ago, and now came back to it, because I have some crazy inheritance hierarchy that I want to replace.
I see there is some action on the repo regarding the typescript types and there is @types/stampit but trying it in codesandbox I got no type hinting.

@FredyC And of course I want to use it with mobx :)

Daniel K.

@FredyC

https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/stampit/index.d.ts
there are definitely some types in place, could be working, CodeSandbox sometimes takes time to "heat up" with TS

Vasyl Boroviak

@koresar

Hey, stampit is under active development.

We've released a fresh new d.ts support just few weeks ago

Ivan Vlatković

@ivandotv

that's nice to hear

is it published? under what name?

Vasyl Boroviak

@koresar

3 months ago we released the built in support of JS getters and setters

@FredyC the development never stopped.

@ivandotv https://github.com/stampit-org/stampit/pull/348/files

Ivan Vlatković

@ivandotv

I see it's included in the package, but what should I use stampit or @stamp/it?

Vasyl Boroviak

@koresar

First one is universal, but mainly built for Frontends

Second one is a clone which is going to be rewritten in the most modern way with TypeScript

Ivan Vlatković

@ivandotv

I'm looking to use the same code on both frontend and backend

Vasyl Boroviak

@koresar

Both will work either side

Ivan Vlatković

@ivandotv

What do you recommend? starting from scratch.

Vasyl Boroviak

@koresar

Although, I recommend "stampit" because it's tiny in size and is compatible with all things "@stamp/..."

I think I forgot to publish v4.3.1 with the new types file. Oops

Ivan Vlatković

@ivandotv

I've tried using the stampit library on codesandbox and it wasn't working (4.3.0) and @stamp/it 1.1.0

Vasyl Boroviak

@koresar

You stampit?

I have no idea what is "stamp" library

Ivan Vlatković

@ivandotv

Yeah I meant stampit

Vasyl Boroviak

@koresar

If you have more details on what is "wasn't working" it would be great. Imagine still learning to read minds.

😂

Imagine =I'm

Ivan Vlatković

@ivandotv

I will try the library tommorrow in TS , and I'll get back to you

Vasyl Boroviak

@koresar

👍

Ivan Vlatković

@ivandotv

Any performance concerns about the library?

Do you have any experience with mobx5? It uses proxies to do its magic

Will the usage of proxies be a problem?

Vasyl Boroviak

@koresar

If you are going to create millions of objects per second then it will be slow. But if less than that - you're good.

Probably proxies are not an issue

Ivan Vlatković

@ivandotv

I will try to mix the two libraries together and I'll report back here.
thanks for the hard work.

Vasyl Boroviak

@koresar

Because stampit generates regular plain text objects.

Thank you very much. I appreciate

Vasyl Boroviak

@koresar

stampit v4.3.1 with improved TypeScript support was just published
https://github.com/stampit-org/stampit/tree/v4.3.1

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