createServer() — vite Function Reference

Architecture documentation for the createServer() function in server.js from the vite codebase.

Function javascript ViteCore DevServer

Entity Profile

ViteCore→ DevServer→ createServer() — vite Function Reference

Dependency Diagram

graph TD
  eef7daac_327d_4587_5c12_5512f2016fd1["createServer()"]
  e69d53a4_8ea7_efa9_ec4e_fa933442bfc2["server.js"]
  eef7daac_327d_4587_5c12_5512f2016fd1 -->|defined in| e69d53a4_8ea7_efa9_ec4e_fa933442bfc2
  style eef7daac_327d_4587_5c12_5512f2016fd1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

playground/ssr-noexternal/server.js lines 7–75

export async function createServer(
  root = process.cwd(),
  isProd = process.env.NODE_ENV === 'production',
  hmrPort,
) {
  const resolve = (p) => path.resolve(import.meta.dirname, p)

  const indexProd = isProd
    ? fs.readFileSync(resolve('index.html'), 'utf-8')
    : ''

  const app = express()

  /**
   * @type {import('vite').ViteDevServer}
   */
  let vite
  if (!isProd) {
    vite = await (
      await import('vite')
    ).createServer({
      root,
      logLevel: isTest ? 'error' : 'info',
      server: {
        middlewareMode: true,
        watch: {
          // During tests we edit the files too fast and sometimes chokidar
          // misses change events, so enforce polling for consistency
          usePolling: true,
          interval: 100,
        },
        hmr: {
          port: hmrPort,
        },
      },
      appType: 'custom',
    })
    app.use(vite.middlewares)
  }

  app.use('*all', async (req, res) => {
    try {
      const url = req.originalUrl

      let template, render
      if (!isProd) {
        // always read fresh template in dev
        template = fs.readFileSync(resolve('index.html'), 'utf-8')
        template = await vite.transformIndexHtml(url, template)
        render = (await vite.ssrLoadModule('/src/entry-server.js')).render
      } else {
        template = indexProd
        render = (await import('./dist/entry-server.js')).render
      }

      const appHtml = await render(url)

      const html = template.replace(`<!--app-html-->`, appHtml)

      res.status(200).set({ 'Content-Type': 'text/html' }).end(html)
    } catch (e) {
      !isProd && vite.ssrFixStacktrace(e)
      console.log(e.stack)
      res.status(500).end(e.stack)
    }
  })

  return { app, vite }
}