Unhandled Runtime Error Error: ERR_ALREADY_CALLED

[kcbuilder]

Failed to launch application using latest version of template

Steps to Reproduce

• created telegram bot
• created application using template, https://github.com/kcbuilder/tg-app-example - public version is here
• started local version with pnpm run dev
• started local tunnel with ngrok ngrok http 3000
• set menu link for created bot in BotFather

When trying to open bot in telegram getting problem

Tested for application created with same template a few month ago, all working good

[heyqbnk]

I wasn't able to reproduce the problem using the nextjs-template, nor the repository you provided. It just opens as usual for me :(

Check if you are using the latest pnpm version, try removing node_modules and installing again

UPD: Ok, I have it now. We can see the issue when using the latest version of sdk-react. Looking into it

[braveltd]

Fixed by changing core/init.ts to

import {
  backButton,
  viewport,
  themeParams,
  miniApp,
  initData,
  $debug,
  init as initSDK,
} from "@telegram-apps/sdk-react";

/**
 * Initializes the application and configures its dependencies.
 */
export function init(debug: boolean): void {
  // Set @telegram-apps/sdk-react debug mode.
  $debug.set(debug);

  // Initialize special event handlers for Telegram Desktop, Android, iOS, etc.
  // Also, configure the package.
  initSDK();

  // Mount all components used in the project.
  if (backButton.isSupported()) {
    backButton.mount();
  }

  // Define components-related CSS variables.
  if (!miniApp.isMounted()) {
    miniApp.mount();
    miniApp.bindCssVars();
  }
  if (!themeParams.isMounted()) {
    themeParams.mount();
    themeParams.bindCssVars();
  }

  initData.restore();

  if (!viewport.isMounted() && !viewport.isMounting()) {
    void viewport.mount().catch((e) => {
      console.error("Something went wrong mounting the viewport", e);
    });
  }

  if (viewport.isMounted()) {
    viewport.bindCssVars();
  }
}

In my project's i don't use eruda, but you can include eruda, i don't think it will break anythink!

[kcbuilder]

Fixed by changing core/init.ts to

import {
  backButton,
  viewport,
  themeParams,
  miniApp,
  initData,
  $debug,
  init as initSDK,
} from "@telegram-apps/sdk-react";

/**
 * Initializes the application and configures its dependencies.
 */
export function init(debug: boolean): void {
  // Set @telegram-apps/sdk-react debug mode.
  $debug.set(debug);

  // Initialize special event handlers for Telegram Desktop, Android, iOS, etc.
  // Also, configure the package.
  initSDK();

  // Mount all components used in the project.
  if (backButton.isSupported()) {
    backButton.mount();
  }

  // Define components-related CSS variables.
  if (!miniApp.isMounted()) {
    miniApp.mount();
    miniApp.bindCssVars();
  }
  if (!themeParams.isMounted()) {
    themeParams.mount();
    themeParams.bindCssVars();
  }

  initData.restore();

  if (!viewport.isMounted() && !viewport.isMounting()) {
    void viewport.mount().catch((e) => {
      console.error("Something went wrong mounting the viewport", e);
    });
  }

  if (viewport.isMounted()) {
    viewport.bindCssVars();
  }
}

In my project's i don't use eruda, but you can include eruda, i don't think it will break anythink!

Got problem with applying theme for dark mode with this approach, not sure about correlation here but would like to share this case

[braveltd]

Fixed by changing core/init.ts to

import {
  backButton,
  viewport,
  themeParams,
  miniApp,
  initData,
  $debug,
  init as initSDK,
} from "@telegram-apps/sdk-react";

/**
 * Initializes the application and configures its dependencies.
 */
export function init(debug: boolean): void {
  // Set @telegram-apps/sdk-react debug mode.
  $debug.set(debug);

  // Initialize special event handlers for Telegram Desktop, Android, iOS, etc.
  // Also, configure the package.
  initSDK();

  // Mount all components used in the project.
  if (backButton.isSupported()) {
    backButton.mount();
  }

  // Define components-related CSS variables.
  if (!miniApp.isMounted()) {
    miniApp.mount();
    miniApp.bindCssVars();
  }
  if (!themeParams.isMounted()) {
    themeParams.mount();
    themeParams.bindCssVars();
  }

  initData.restore();

  if (!viewport.isMounted() && !viewport.isMounting()) {
    void viewport.mount().catch((e) => {
      console.error("Something went wrong mounting the viewport", e);
    });
  }

  if (viewport.isMounted()) {
    viewport.bindCssVars();
  }
}

In my project's i don't use eruda, but you can include eruda, i don't think it will break anythink!

Got problem with applying theme for dark mode with this approach, not sure about correlation here but would like to share this case

probably i should move all bindCss after mount's. checking if mounted. like with viewport!

[braveltd]

In my current project, i have only dark mode possible, so i don't know if it's my init.ts code that breaks or somethink else. for me, what i provided works with nextjs@14.2.16.

[heyqbnk]

The problem is probably related to the React's StrictMode performing all effects twice. It is probably resetting refs also, we use them in the useTelegramMock (useClientOnce actually) function mocking the environment.

To solve it, we need to call the init function only once before the React tree is rendered, or at least unmount all mounted SDK components.

I currently have no time for it and can fix the problem only on the next week. Feel free to propose a solution

[vladutjs]

Has anybody got around this issue?

[miguelaeh]

I can confirm that this is the fix: #19 (comment)

[vikiival]

Based on I managed to get it working #19 (comment)

The diff is that I placed themeParams.bindCssVars(); outside of the if statement 🤷

additionally I have added
import '@telegram-apps/telegram-ui/dist/styles.css'; in Root.tsx

TL;DR

export function init(debug: boolean): void {
  // Set @telegram-apps/sdk-react debug mode.
  $debug.set(debug);

  // Initialize special event handlers for Telegram Desktop, Android, iOS, etc.
  // Also, configure the package.
  initSDK();

  // Mount all components used in the project.
  if (backButton.isSupported()) {
    backButton.mount();
  }

  // Define components-related CSS variables.
  if (!miniApp.isMounted()) {
    miniApp.mount();
    miniApp.bindCssVars();
  }
  if (!themeParams.isMounted()) {
    themeParams.mount();
  }
  
  themeParams.bindCssVars();

  initData.restore();

  if (!viewport.isMounted() && !viewport.isMounting()) {
    void viewport.mount().catch((e) => {
      console.error("Something went wrong mounting the viewport", e);
    });
  }

  if (viewport.isMounted()) {
    viewport.bindCssVars();
  }
}

[braveltd]

Based on I managed to get it working #19 (comment)

The diff is that I placed themeParams.bindCssVars(); outside of the if statement 🤷

additionally I have added import '@telegram-apps/telegram-ui/dist/styles.css'; in Root.tsx

TL;DR

export function init(debug: boolean): void {
  // Set @telegram-apps/sdk-react debug mode.
  $debug.set(debug);

  // Initialize special event handlers for Telegram Desktop, Android, iOS, etc.
  // Also, configure the package.
  initSDK();

  // Mount all components used in the project.
  if (backButton.isSupported()) {
    backButton.mount();
  }

  // Define components-related CSS variables.
  if (!miniApp.isMounted()) {
    miniApp.mount();
    miniApp.bindCssVars();
  }
  if (!themeParams.isMounted()) {
    themeParams.mount();
  }
  
  themeParams.bindCssVars();

  initData.restore();

  if (!viewport.isMounted() && !viewport.isMounting()) {
    void viewport.mount().catch((e) => {
      console.error("Something went wrong mounting the viewport", e);
    });
  }

  if (viewport.isMounted()) {
    viewport.bindCssVars();
  }
}

i believe you can make PR with that code. at least this works for me. importing styles helped a lot. or we should just wait for react-ui, react-sdk to get fixed!

[braveltd]

Made an PR for that issue...