build --watch doesnt build workers (new Worker(new URL()))

[spencerchubb]

Describe the bug

I have a library that uses workers and wasm. When I build the first time, it works perfectly, but when it hot-reloads it gives an error.

I have included a minimal example that uses the vite starter template and only adds a couple lines of code to demo the issue.

Reproduction

https://github.com/spencerchubb/hot-reload-bug.git

Steps to reproduce

git clone https://github.com/spencerchubb/hot-reload-bug.git
cd hot-reload-bug
npm i
npx vite build --watch
npx vite preview

# If you open localhost:5000 there are no errors in the console.
# Now do some arbitrary change to trigger the hot-reload.
# After a hot-reload, there will be an error in the console.

System Info

Windows, Chrome

Used Package Manager

npm

Logs

message: "Uncaught SyntaxError: Unexpected token '<'"

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]

related: #11786, #11919