[V3 Bugs] Developing on two projects simultaneously, since their frontend URLs are fixed, will lead to accessing the wrong page

[fakecore]

Description

Wails 3 uses localhost:5173 as the fixed URL. When I open two Wails projects, both projects will direct to the same page.

To Reproduce

1. Change directory to wails3_project_A.
2. Run wails3 dev. (frontend listen on localhost:5173)
3. Change directory to wails3_project_B.
4. Run wails3 dev. (frontend listen on localhost:5174)
5. A: Show the page belonging to project A. (connect to localhost:5173)
6. B: Show the page belonging to project A. (connect to localhost:5173)

Expected behaviour

A: Show the page belonging to project A. (connect to localhost:5173) B: Show the page belonging to project B. (connect to localhost:5174)

Screenshots

No response

Attempted Fixes

No response

System Details

Wails Doctor



# System
┌──────────────────────────────┐
| Name          | MacOS        |
| Version       | 14.4.1       |
| ID            | 23E224       |
| Branding      | Sonoma       |
| Platform      | darwin       |
| Architecture  | arm64        |
| Apple Silicon | true         |
| CPU           | Apple M1 Pro |
| CPU           | Unknown      |
| GPU           | Unknown      |
| Memory        | Unknown      |
└──────────────────────────────┘

# Build Environment
┌─────────────────────────────────────────────────────────┐
| Wails CLI    | v3.0.0-alpha.4                           |
| Go Version   | go1.22.1                                 |
| Revision     | cf130a6e2564426b2ab222598cd452e68e8a62bd |
| Modified     | false                                    |
| -buildmode   | exe                                      |
| -compiler    | gc                                       |
| CGO_CFLAGS   |                                          |
| CGO_CPPFLAGS |                                          |
| CGO_CXXFLAGS |                                          |
| CGO_ENABLED  | 1                                        |
| CGO_LDFLAGS  |                                          |
| GOARCH       | arm64                                    |
| GOOS         | darwin                                   |
| vcs          | git                                      |
| vcs.modified | false                                    |
| vcs.revision | cf130a6e2564426b2ab222598cd452e68e8a62bd |
| vcs.time     | 2024-04-06T03:38:43Z                     |
└─────────────────────────────────────────────────────────┘

# Dependencies
┌────────────────────────────────────────────────────────────────────────┐
| Xcode cli tools | 2406                                                 |
| npm             | 10.2.4                                               |
| *NSIS           | Not Installed. Install with `brew install makensis`. |
└─────────────────────── * - Optional Dependency ────────────────────────┘

# Diagnosis
 SUCCESS  Your system is ready for Wails development!

Additional context

No response

[fakecore]

If possible, I would like to try to fix it. Do you have any suggestions for this bug?

[leaanthony]

It uses whatever url you give it: FRONTEND_DEVSERVER_URL: 'http://localhost:5173'

https://github.com/wailsapp/wails/blob/cf130a6e2564426b2ab222598cd452e68e8a62bd/v3/internal/templates/_common/Taskfile.tmpl.yml#L438

[fakecore]

Wails cannot detect the correct frontend port. For example, I opened a project running on port 5173. When running the Wails project, the frontend port will run on 5174. However, the backend still connects to port 5173.

[fakecore]

Can wails support the dynamic port?

[fakecore]

It will be better than vite can read this env FRONTEND_DEVSERVER_URL: 'http://localhost:5175' to set the frontend port.