JFXPanel

build.gradle.kts (webview-desktop)

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    id("org.openjfx.javafxplugin") version "0.0.10"
}

repositories {
    mavenCentral()
}

val javafxModules = arrayOf("controls", "swing", "fxml", "graphics", "web")

javafx {
    modules = javafxModules.map { "javafx.$it" }
}

desktop.gradle.kts

kotlin {
    jvm {
        withJava()
    }

    sourceSets {
        named("commonMain")

        named("jvmMain") {
            dependencies {
                implementation(compose.desktop.currentOs)
                implementation(project(":common:webview-desktop"))
            }
        }

        named("jvmTest") {
            dependencies {
                implementation("junit:junit:4.12")
            }
        }
    }
}

DesktopWebView.java

public class DesktopWebView {

    public static JFrame renderWebView(String url) {
        JFrame frame = new JFrame();
        final JFXPanel fxPanel = new JFXPanel();

        frame.add(fxPanel);
        frame.setSize(300, 200);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Platform.runLater(() -> {
            System.out.println("Start loading web");
            WebView view = new WebView();
            fxPanel.setScene(new Scene(view));
            view.getEngine().load(url);
        });

        return frame;
    }
}

main.kt

fun main() = SwingUtilities.invokeLater {
    val jfxFrame = DesktopWebView.renderWebView(provideLoginUrl())

    jfxFrame.defaultCloseOperation = WindowConstants.EXIT_ON_CLOSE
    jfxFrame.title = "Test webview"

    jfxFrame.setSize(800, 600)
    jfxFrame.isVisible = true
}