[dev server] appIndex ignored if the url is not a sub-directory of the html file

[GabrielDelepine]

With the following configuration

export default {
  appIndex: "./src/index.html",
  rootDir: "./"
}

The appIndex will be ignored unless the URL starts with /src/, leading to a 404 HTTP response.

This seems to be an intentional behavior of the historyApiFallbackMiddleware (see the line 38)

I cannot see any benefits of this behavior. The actual location of the html file ./src/index.html shouldn't have anything to do with the URL pattern.

Why force a URL prefix based on the actual location of the html file?

I suggest removing the following if statement:

if (!ctx.url.startsWith(appIndexBrowserPathPrefix)) {  
    return next();
}

Am I missing something here? @LarsDenBakker