when build. mime Error

[Sundayuu]

var lite = require('mime/lite');

       ^

Error [ERR_REQUIRE_ESM]: require() of ES Module /root/workspace/node16-pnpm8-build/repo/node_modules/.pnpm/registry.npmmirror.com+mime@4.0.0/node_modules/mime/dist/src/index_lite.js from /root/workspace/node16-pnpm8-build/repo/node_modules/.pnpm/registry.npmmirror.com+rollup-plugin-serve@3.0.0/node_modules/rollup-plugin-serve/dist/index.cjs not supported.

Instead change the require of index_lite.js in /root/workspace/node16-pnpm8-build/repo/node_modules/.pnpm/registry.npmmirror.com+rollup-plugin-serve@3.0.0/node_modules/rollup-plugin-serve/dist/index.cjs to a dynamic import() which is available in all CommonJS modules.

at Object.<anonymous> (/root/workspace/node16-pnpm8-build/repo/node_modules/.pnpm/registry.npmmirror.com+rollup-plugin-serve@3.0.0/node_modules/rollup-plugin-serve/dist/index.cjs:7:12)

at Object.<anonymous> (/root/workspace/node16-pnpm8-build/repo/node_modules/.pnpm/@toolkit+cli-plugin-rollup@1.1.0_@babel+core@7.12.13_tslib@2.4.0_typescript@4.7.4/node_modules/@toolkit/cli-plugin-rollup/lib/dev.config.js:6:15)

at Object.<anonymous> (/root/workspace/node16-pnpm8-build/repo/node_modules/.pnpm/@toolkit+cli-plugin-rollup@1.1.0_@babel+core@7.12.13_tslib@2.4.0_typescript@4.7.4/node_modules/@toolkit/cli-plugin-rollup/bin/toolkit-cli-service.js:3:19) {

code: 'ERR_REQUIRE_ESM'

}

[thgh]

Does it work using this version range ^2 in package.json?

[ythvg]

reason: the mime version 4 is now pure esm . It cannot be require()'d from CommonJS.
solve: use import/export in rollup.config.js and set "type": "module" in your package.json

[thgh]

For your information:
rollup-plugin-serve@^1 uses mime 2
rollup-plugin-serve@^2 uses mime 3
rollup-plugin-serve@^3 uses mime 4

[drushbrook]

@thgh - according to the most downloaded versions of rollup-plugin-serve as reported by the npm version history (https://www.npmjs.com/package/rollup-plugin-serve?activeTab=versions)
rollup-plugin-serve@1.0.1 uses mime>=2.0.3 which to my understanding will now use mime@4.0.0
rollup-plugin-serve@1.1.0 uses mime>=2.4.6 which to my understanding will now use mime@4.0.0
rollup-plugin-serve@2.0.2 uses mime>=2.4.6 which to my understanding will now use mime@4.0.0
rollup-plugin-serve@2.0.3 uses mime^3 which to my understanding will now use mime@3.0.0
rollup-plugin-serve@latest (3.0.0) uses mime^4

unfortunately I'm using a package that has a subdependancy for rollup-plugin-serve@^1.0.1 hence running into a similar mime error.

[thgh]

Sure, published the patch in rollup-plugin-serve@1.1.1 just now

[LiarCoder]

@thgh
Hi, It seems that this error will still occur, and I create a demo to reproduce : https://codesandbox.io/p/sandbox/5wv6z9 , just follow the steps in the README.md file.
I'm using the latest version of rollup-plugin-serve (v3.0.0)。And what is the most strangest thing is this demo theoretically worked well just few weeks ago......🤔
And I notice that mime was upgraded to 4.0.7 on 2025-04-03, maybe it causes the error? I'm not sure.

So, could you please check this error? Thank you in advance~

[thgh]

I have never seen commonjs in rollup.config.js, consider using what's suggested in the docs. So refactor require / module.exports to import / export default

If you want to add support for that in this plugin, create a new folder in the test folder and add a test case.