[bug] Child window failed to show if main window is not visible initially hidden

[selastingeorge]

Describe the bug

In the tauri.config.json file, if the visible attribute is set to false, and subsequently, the window is displayed using the show() method within the setup() hook, calling a Tauri command to create a child window results in the child window appearing and disappearing automatically.

The child window shows normally if visible is set to true for mainwindow.

Part of tauri.config.json is given below:

"app": {"windows": [
      {
        "title": "childwindow-test",
        "width": 800,
        "height": 600,
        "visible": false
      }
    ],
    "security": {
      "csp": null
    }
  },

In main.rs file:

#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]

use tauri::{AppHandle, Manager};

#[tauri::command]
async fn open_docs(handle: tauri::AppHandle) {
  let docs_window = tauri::WebviewWindowBuilder::new(
    &handle,
    "external", /* the unique window label */
    tauri::WebviewUrl::External("https://tauri.app/".parse().unwrap())
  ).build().unwrap();
}

fn main() {
    tauri::Builder::default()
        .setup(|app|{
            let mainwindow = app.get_webview_window("main").unwrap();
            mainwindow.show();
            Ok(())
        })
        .plugin(tauri_plugin_shell::init())
        .invoke_handler(tauri::generate_handler![open_docs])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

In Angular code, i invoke the command using:

import { invoke } from "@tauri-apps/api/core";
async openWindow() {
    await invoke("open_docs").then(()=>{
        console.log("Window Created");
    });
}

Reproduction

To reproduce the bug, follow these steps:

• Set visible to false in tauri.config.json
• Show the main window again using show() method from WebviewWindow
• Create a tauri command to create a child window.
• Call the tauri command from the front end.

Sample project to reproduce the issue : https://github.com/selastingeorge/childwindow-test
Example code taken from (Modified for Tauri v2 support): https://tauri.app/v1/guides/features/multiwindow/

Expected behavior

The child window should be displayed along with main window.

Full tauri info output

[✔] Environment
    - OS: Windows 10.0.22631 X64
    ✔ WebView2: 122.0.2365.92
    ✔ MSVC: Visual Studio Community 2022
    ✔ rustc: 1.77.0 (aedd173a2 2024-03-17)
    ✔ cargo: 1.77.0 (3fe68eabf 2024-02-29)
    ✔ rustup: 1.27.0 (bbb9276d2 2024-03-08)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (default)
    - node: 20.11.0
    - npm: 10.2.4

[-] Packages
    - tauri [RUST]: 2.0.0-beta.13
    - tauri-build [RUST]: 2.0.0-beta.10
    - wry [RUST]: 0.37.0
    - tao [RUST]: 0.26.2
    - @tauri-apps/api [NPM]: 2.0.0-beta.6
    - @tauri-apps/cli [NPM]: 2.0.0-beta.11

[-] App
    - build-type: bundle
    - CSP: unset
    - frontendDist: ../dist/childwindow-test/browser
    - devUrl: http://localhost:1420/
    - framework: Angular
    - bundler: Webpack

Stack trace

No response

Additional context

No response

[amrbashir]

fixed in #9100