Function preTransformRequest

packages/vite/src/node/server/middlewares/indexHtml.ts:556–566

(
  server: ViteDevServer,
  decodedUrl: string,
  decodedBase: string,
)

// NOTE: We usually don't prefix `url` and `base` with `decoded`, but in this file particularly
// we're dealing with mixed encoded/decoded paths often, so we make this explicit for now.
function preTransformRequest(
  server: ViteDevServer,
  decodedUrl: string,
  decodedBase: string,
) {
  if (!server.config.server.preTransformRequests) return

  // transform all url as non-ssr as html includes client-side assets only
  decodedUrl = unwrapId(stripBase(decodedUrl, decodedBase))
  server.warmupRequest(decodedUrl)
}

async function generateFallbackHtml(server: ViteDevServer) {
  const hmrRuntime = await getHmrImplementation(server.config)