VS Code with installed VLS does not recognize vue files, goes into infinite message sending

[zfeher]

Vue - Official extension or vue-tsc version

3.0.8 - 3.1.1

VSCode version

1.105.1

Vue version

2.7.6, 3.5.22

TypeScript version

5.8.3

System Info

System:
    OS: Windows 11 10.0.26200
    CPU: (8) x64 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
    Memory: 3.68 GB / 15.70 GB
  Binaries:
    Node: 22.20.0 - C:\Users\zfeher\AppData\Local\fnm_multishells\5424_1760862863447\node.EXE
    npm: 11.6.1 - C:\Users\zfeher\AppData\Local\fnm_multishells\5424_1760862863447\npm.CMD
    pnpm: 10.18.1 - C:\Users\zfeher\AppData\Local\fnm_multishells\5424_1760862863447\pnpm.CMD
  Browsers:
    Chrome: 141.0.7390.108
    Edge: Chromium (140.0.3485.94)
    Firefox: 144.0 - C:\Program Files\Mozilla Firefox\firefox.exe

package.json dependencies

Steps to reproduce

repo: vls-issue-pinned-ls-vue2

1, clone the repo
2, pnpm install
3, open repo in VS Code
4, open src/Component.vue

What is expected?

VLS to work with configured vue language server installed in repo node_modules.
(Using the bundled VLS works with both 3.0.8 and 3.1.1)

What is actually happening?

VLS shows many errors, doesn't recognize anything.

Opening VLS Output will log infinite messages when src/Component.vue is open:

[Trace - 10:22:45 AM] Sending request 'textDocument/foldingRange - (195)'.
[Trace - 10:22:45 AM] Received response 'textDocument/foldingRange - (195)' in 1ms.
[Trace - 10:22:45 AM] Sending request 'textDocument/foldingRange - (196)'.
[Trace - 10:22:45 AM] Received response 'textDocument/foldingRange - (196)' in 1ms.
[Trace - 10:22:45 AM] Sending request 'textDocument/foldingRange - (197)'.
[Trace - 10:22:45 AM] Received response 'textDocument/foldingRange - (197)' in 1ms.
[Trace - 10:22:46 AM] Sending request 'textDocument/foldingRange - (198)'.
[Trace - 10:22:46 AM] Received response 'textDocument/foldingRange - (198)' in 1ms.
[Trace - 10:22:46 AM] Sending request 'textDocument/foldingRange - (199)'.
[Trace - 10:22:46 AM] Received response 'textDocument/foldingRange - (199)' in 1ms.
...

Tried this with 3.0.8 and latest 3.1.1 extensions as well without any success.

Created Vue 3 version as well vls-issue-pinned-ls-vue3 because need both to work for projects.

Link to minimal reproduction

https://github.com/zfeher/vls-issue-pinned-ls-vue2

Any additional comments?

No response

[KazariEX]

Cannot reproduce the first issue on my end.

Have you tried to reproduce the issue on other machines or environments?

[zfeher]

Thank you for the quick check.

Haven't tried elsewhere yet. This is my main machine and don't have another one.

After your suggestion I tried this in WSL to see if there is a difference. And it seems yes 😮 Opening the project from there via the remote VS Code, VLS seems to work correctly. The messages keep doing the infinite send/receive thingy but maybe that is ok and it is some kind of polling thing.

Seems like this might be a Windows only specific issue.

[NorthEgg]

I also encountered this situation.

Vue - Official extension

3.1.1

VSCode version

1.105.1

Vue version

2.7.16

TypeScript version

5.8.3

System Info

  System:
    OS: Windows 11 10.0.26100
    CPU: (20) x64 13th Gen Intel(R) Core(TM) i9-13900H
    Memory: 25.70 GB / 63.69 GB
  Binaries:
    Node: 23.10.0 - C:\DevelopApps\node\23.10.0\node.EXE
    npm: 11.6.0 - C:\DevelopApps\node\23.10.0\npm.CMD
    pnpm: 10.18.1 - C:\DevelopApps\node\23.10.0\pnpm.CMD
    bun: 1.2.21 - C:\DevelopApps\bun\bin\bun.EXE
    Deno: 2.4.5 - C:\DevelopApps\deno\bin\deno.EXE
  Browsers:
    Edge: Chromium (140.0.3485.54)
    Firefox: 143.0 - C:\Program Files\Mozilla Firefox\firefox.exe
    Internet Explorer: 11.0.26100.1882

package.json dependencies

{
  "name": "vls-issue-pinned-ls-vue2",
  "scripts": {
    "type:check": "vue-tsc --noEmit"
  },
  "packageManager": "pnpm@10.18.1+sha512.77a884a165cbba2d8d1c19e3b4880eee6d2fcabd0d879121e282196b80042351d5eb3ca0935fa599da1dc51265cc68816ad2bddd2a2de5ea9fdf92adbec7cd34",
  "dependencies": {
    "vue": "2.7.16"
  },
  "devDependencies": {
    "@vue/language-server": "3.0.8",
    "typescript": "5.8.3",
    "vue-component-type-helpers": "3.0.8",
    "vue-tsc": "3.0.8"
  }
}

log

[Trace - 19:39:23] Sending request 'textDocument/foldingRange - (1404)'.
Params: {
    "textDocument": {
        "uri": "file:///c%3A/DevelopFilesMy/vls-issue-pinned-ls-vue2/src/Component.vue"
    }
}


[Trace - 19:39:23] Received response 'textDocument/foldingRange - (1404)' in 0ms.
Result: [
    {
        "startLine": 10,
        "endLine": 11
    },
    {
        "startLine": 0,
        "endLine": 2
    },
    {
        "startLine": 5,
        "endLine": 6
    },
    {
        "startLine": 9,
        "endLine": 12
    }
]


[Trace - 19:39:23] Sending request 'textDocument/foldingRange - (1405)'.
Params: {
    "textDocument": {
        "uri": "file:///c%3A/DevelopFilesMy/vls-issue-pinned-ls-vue2/src/Component.vue"
    }
}


[Trace - 19:39:23] Received response 'textDocument/foldingRange - (1405)' in 0ms.
Result: [
    {
        "startLine": 10,
        "endLine": 11
    },
    {
        "startLine": 0,
        "endLine": 2
    },
    {
        "startLine": 5,
        "endLine": 6
    },
    {
        "startLine": 9,
        "endLine": 12
    }
]


[Trace - 19:39:23] Sending request 'textDocument/foldingRange - (1406)'.
Params: {
    "textDocument": {
        "uri": "file:///c%3A/DevelopFilesMy/vls-issue-pinned-ls-vue2/src/Component.vue"
    }
}


[Trace - 19:39:23] Received response 'textDocument/foldingRange - (1406)' in 1ms.
Result: [
    {
        "startLine": 10,
        "endLine": 11
    },
    {
        "startLine": 0,
        "endLine": 2
    },
    {
        "startLine": 5,
        "endLine": 6
    },
    {
        "startLine": 9,
        "endLine": 12
    }
]
........

[curlykay]

This issue appears to be specific to @vue/language-server on the Windows platform.

My project is configured using the officially recommended legacy compatibility solution: #5455 (comment).

It runs normally on macOS, but on Windows, it produces the same error as the author encountered.
Here's my repo: https://github.com/curlykay/issue-vls-vue2

After opening the project in VS Code, open the src/App.vue file. Once VLS starts up, you'll see the error message in src/App.vue.

System Info:

System:
    OS: Windows 10 10.0.19045
    CPU: (12) x64 AMD Ryzen 5 5500U with Radeon Graphics
    Memory: 6.89 GB / 15.34 GB