Describe the bug

The error middleware requires JS to display anything:

But sometimes you have an error that prevents the JS from loading:

In these cases you just get a blank page

Reproduction

n/a

Steps to reproduce

The error handler does not work with regular middlewares:

vite.middlewares.use((req, res, next) => {
	throw new Error('hello world');
});

It only works with post middlewares:

return () => {
	vite.middlewares.use((req, res) => {
		throw new Error('hello world');
	});
};

https://vitejs.dev/guide/api-plugin#configureserver

System Info

vite 5.2.8

Used Package Manager

pnpm

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.