--config must be used with =

[basickarl]

Describe the bug

https://vite.dev/config/

It states you can do the following: vite --config my-config.js

This does not work on my machine, I must explicitly use the = symbol: vite --config=my-config.js for this to work

Config (vite.config.ts):

Works:

Does not work:

As you see, it doesn't respect the port number.

Reproduction

https://github.com/basickarl/ts-alias

Steps to reproduce

npm install

for it to work run: npm run dev

for it to not respect the config run: npm run dev-does-not-use-config

You can see in the package.json the differences between the scripts.

System Info

System:
    OS: macOS 14.1.1
    CPU: (10) arm64 Apple M1 Max
    Memory: 2.42 GB / 64.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.14.0 - ~/.nvm/versions/node/v22.14.0/bin/node
    Yarn: 1.22.21 - ~/.nvm/versions/node/v22.14.0/bin/yarn
    npm: 10.9.2 - ~/.nvm/versions/node/v22.14.0/bin/npm
    pnpm: 10.4.1 - ~/Library/pnpm/pnpm
  Browsers:
    Chrome: 133.0.6943.127
    Safari: 17.1

I am also using ZSH as the shell.

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[sapphi-red]

I think this is caused by npx.
npx --no vite --config vite.config.ts does not work, but npx --no -- vite --config vite.config.ts works. I think the config option is removed by npx.