System Info

System:
OS: Windows 10 10.0.19045
CPU: (4) x64 Intel(R) Core(TM) i5-7400 CPU @ 3.00GHz
Memory: 1.82 GB / 7.83 GB
Binaries:
Node: 22.6.0 - ~\AppData\Local\fnm_multishells\14848_1725611723399\node.EXE
npm: 10.8.2 - ~\AppData\Local\fnm_multishells\14848_1725611723399\npm.CMD
pnpm: 9.7.0 - ~\AppData\Local\fnm_multishells\14848_1725611723399\pnpm.CMD
bun: 1.1.21 - ~.bun\bin\bun.EXE
Browsers:
Edge: Chromium (127.0.2651.74)
Internet Explorer: 11.0.19041.4355
npmPackages:
@rspack/core: 1.0.3 => 1.0.3

Details

Hi, I'm using Rsbuild environment API to build a client and a server. There are 3 problems with my repro:

1. queueMicrotask is not defined in ESM environment during dev
   I enforced both bundle to output ESM (disabled esm on client since rsbuild can't output <script type="module">). But for some reason queueMicrotask is not available in ESM environment during dev. If I configure my ssr environment to output in CJS, it works as expected and no error. Only in ESM and dev mode this error raises.

2. Even though I have "type": "module" in my package.json, Rspack trying to load a module as CJS module. So I had to add this config in my config:

        filename: {
          js: "[name].mjs",
        },

3. If I configure dist path something that starts with a dot (.), printed URLs are weird:

      output: {
        inlineStyles: true,
        inlineScripts: true,
        distPath: {
          root: ".output/client",
        },
        cleanDistPath: true,
        target: "web",
      },

  > Local:    http://localhost:3000/../C:\Users\user\dev\vobyssr\apps\web\.output\client/

Reproduce link

https://github.com/sibbng/voby-ssr-demo

Reproduce Steps

1. pnpm i
2. pnpm build
3. pnpm dev
4. Visit localhost:3000
5. Check console you will see ReferenceError: queueMicrotask is not defined