Function hmr

packages/vite/src/node/server/hmr.ts:617–655

(environment: DevEnvironment)

  }

  async function hmr(environment: DevEnvironment) {
    try {
      const { options, error } = hotMap.get(environment)!
      if (error) {
        throw error
      }
      if (!options.modules.length) {
        // html file cannot be hot updated
        if (file.endsWith('.html') && environment.name === 'client') {
          environment.logger.info(
            colors.green(`page reload `) + colors.dim(shortFile),
            {
              clear: true,
              timestamp: true,
            },
          )
          environment.hot.send({
            type: 'full-reload',
            path: config.server.middlewareMode
              ? '*'
              : '/' + normalizePath(path.relative(config.root, file)),
          })
        } else {
          // loaded but not in the module graph, probably not js
          debugHmr?.(
            `(${environment.name}) [no modules matched] ${colors.dim(shortFile)}`,
          )
        }
        return
      }

      updateModules(environment, shortFile, options.modules, timestamp)
    } catch (err) {
      environment.hot.send({
        type: 'error',
        err: prepareError(err),
      })
    }
  }

  const hotUpdateEnvironments =
    server.config.server.hotUpdateEnvironments ??