Hmm,

A boolean was expected

🤔 I guess its a boolean otherwise code wouldn't have been compiled.

Do I understand correctly that to publish my project to Maven Central all dependencies need to be in Central as well? If so, can we expect

kotlin-wrappers

and

kotlinx-nodejs

artifacts to be published to Central anytime soon?

I would also like to remind you that another experimental feature was added in 1.4.20 - Ignoring compilation errors with IR compiler. How many of you guys have tried it and ready to share some feedback?

Is there any recommended way to show a map in a Kotlin/JS based web app?

Anybody knows how to create and use custom events in Kotlin/JS? I'd like to do something like this:

class TreeItemSelectEvent<T>(val treeItem: TreeItem<T>) : Event("treeitemselect")

fun select(treeItem: TreeItem<T>) {
    element.dispatchEvent(TreeItemSelectEvent(treeItem))
}

When I try to create and dispatch the event, I get the following error:

TypeError: Failed to construct 'Event': Please use the 'new' operator, this DOM object constructor cannot be called as a function.

Using

CustomEvent

instead of

Event

doesn't help. What am I missing?

is it possible to build kotlin multiplatform to js without using jvm?

Did someone manage to use the d.ts of its Kotlin/JS MPP? I do not manage to implement an interface named

LifecycleOwner

declared like that:

export namespace com.company.core.livedata {
    class Lifecycle {
        constructor();
        readonly tags: kotlin.collections.MutableMap<string, any>;
        isStarted: boolean;
        start(): void;
        stop(): void;
        addStopObserver(block: () => void): void;
        notifyObserversStop(): void;
    }
}
export namespace com.company.core.livedata {
    interface LifecycleOwner {
        readonly lifecycle: com.company.core.livedata.Lifecycle;
    }
}

I just don’t manage to import it in pure React app (with typescript). I import the module like that:

import * as companycore from 'companycore';

I can find

Lifecycle

class if I log the whole module:

console.log("companycore", companycore)

But not the

LifecycleOwner

interface. Any idea?

This message was deleted.

Hi, just trying to change to the js IR compiler backend, but keep getting the error:

You already registered Kotlin/JS target 'js' with another compiler: legacy

Any idea on how to do that properly? I tried clearing gradle / idea / etc. caches but without success so far... :(

It seems a bit complicated with webpack already... adding to that that I don't know what the kotlin js gradle tasks do for me when I enable css... I'm pretty confused.

Am new to frontend development. Am looking for a way to validate HTML form before submitting them. E.g Form fields should not be empty, if field type is number and its length is restricted to 10 then before submitting it should check for these things. Any framework which I can embed in Kotlin/JS? PS: Am creating a HTML page inside override fun RBuilder.render() {

Does anyone have a good setup/architecture for enabling different environments? Let’s say I have three environments

live

,

test

and

dev

. In each environment I’d like to use different configuration values, for example a different API URL. So basically I’d have three

.kt

files with different values each and depending on what I’d like to build/deploy I need a different one of these to be used 🤔 Ideally the values are provided when starting the server (e.g. webpack dev server) so that they can depend on environment variables (e.g. on Heroku).

Anyone has an idea what could cause this error:

kotlin-react-tutorial.js?92c2:40758 Uncaught TypeError: Cannot read property 'toString' of undefined
    at _no_name_provided__132.invoke_223 (kotlin-react-tutorial.js?92c2:40758)
    at _no_name_provided__83.eval [as _$render] (kotlin-react-tutorial.js?92c2:40780)
    at _no_name_provided__83.invoke_132 (kotlin-react-tutorial.js?92c2:24110)
    at eval (kotlin-react-tutorial.js?92c2:24149)
    at buildElements (kotlin-react-tutorial.js?92c2:23965)
    at _no_name_provided__84.invoke_134 (kotlin-react-tutorial.js?92c2:24124)
    at VideoList (kotlin-react-tutorial.js?92c2:24136)
    at renderWithHooks (react-dom.development.js?b313:14985)
    at updateFunctionComponent (react-dom.development.js?b313:17356)
    at beginWork (react-dom.development.js?b313:19063)

In here:

_no_name_provided__132.prototype.invoke_223 = function ($this$rFunction, props) {
    var tmp0_iterator = props.videos.iterator_68();
    while (tmp0_iterator.hasNext_49()) {
      var video = tmp0_iterator.next_56();
      var tmp0_p_0 = null;
      var tmp1_tag_0_1 = _no_name_provided_$factory_98(tmp0_p_0);
      var tmp0_apply_0_3 = new RDOMBuilder(tmp1_tag_0_1);
>>>      tmp0_apply_0_3._set_key_(video._id.toString()); <<<<<<
      var tmp0__anonymous__1_5 = tmp0_apply_0_3._attrs_0;
      _set_onClickFunction_(tmp0__anonymous__1_5, _no_name_provided_$factory_99(props, video));
      if (video.equals(props.selectedVideo)) {
        tmp0_apply_0_3.unaryPlus_8('\u25B6 ');
      }tmp0_apply_0_3.unaryPlus_8('' + video._speaker + ': ' + video._title);
      $this$rFunction.child_4(tmp0_apply_0_3.create_11());
      Unit_getInstance();
    }
  };

I'm using the IR compiler in dev mode

Any good intro on coroutine scope in Kotlin JS? I want to use scope limited to JS/HTML page lifecycle instead of GlobalScope.

Do we have any tool similar to "Analyze APK" but for JS? It's not really clear what are included in the webpacked JS.

which command should I run to generate the root build folder? I someone was able to get that working yesterday but now I am not able to regenerate it after running

./gradlew clean

. I've tried build, run, and jsBrowserTask. What is the normal sequence of CLI commands?

Hi all! After a long wait I could finally enable the IR compiler on my project! After running the production webpack, the size of the resulting js file went down from 4.9MB to a whopping 4.3MB, which in fairness was a bit disappointing. I use the React-wrapper, Coroutines, Ktor, Kodein, is there any way to optimize the size?

In my current full stack project, one big js file is getting generated. Is there any way to have multiple js files instead of one big output.js?

I'm trying to use an npm react module that needs css for it to work... the html renders with my wrapper... but no css.

How can I define:

rowExpansionTemplate?(data: any): JSX.Element | undefined;
    rowGroupHeaderTemplate?(data: any, index: number): React.ReactNode | undefined;

In a Kotlin js react component wrapper?

Is it possible to use npmjs packages in Kotlin/JS? If yes can you please share good documentation on how to call js apis from Kotlin code?

Using the kotlin js tutorial's setup, and I keep on loosing my source set, I constantly have to do redo a gradle sync to get them back... is this a bug?

I've noticed that with IR there is no concept of "unused Kotlin dependencies". With legacy backend I could add a Kotlin/JS dependency to a project, and if I didn't use it at all, it was fully removed from the final bundle (it was put into separate js module, which could be filtered by webpack tree-shaking). With IR just adding a dependency puts its code in the

projectName.js

file processed by webpack, which makes all

require()

directives resolved and added to the final bundle. It probably does not impact typical use cases, but for modular framework like KVision it makes a difference. I can't just work with an empty template project with all modules in

build.gradle.kts

, because the bundle is very large even though the application is just a "hello world". It's a bit surprising for me considering IR should make final bundles lighter 😉

Is

-Xir-property-lazy-initialization

only relevant in projects with binaries? Means I don’t have to set it in Kotlin/JS libraries at all, right?

I am working on a library for technical indicators and am wondering if it is possible to compile the same library code for JS and JVM. This would allow me to have a single code base that could run in the browser as well as server side. Some googling has led me to believe that this is not possible but I wanted to confirm.

JCenter and Bintray will shut down on May 1st. Seems like there are multiple Kotlin projects on these repos, e.g. https://github.com/JetBrains/kotlin-wrappers Did Jetbrains already anounce a plan that these repos will be published somewhere else in time?

Is there a planned release of when we get source maps in the IR compiler? My team can’t use the IR compiler because it still lacks source maps, and that also means I can’t use typescript definitions. I was really hoping it was going to come in 1.4.30.

distribution

also seems not to work for Node, probably for related reasons

@turansky I saw your reply in the ktor-client size ticket. Could you tell me what tool did you use to get the bundle size picture?