could not resolve vue-demi (Nuxt 3 deployment on netlify)

[Joaojack]

Hi team,
got this error when trying to deploying (for testing) a Nuxt 3 app with vue-use
4:25:43 PM: > .netlify/functions-internal/server/node_modules/@vueuse/shared/index.mjs:636:14: error: Could not resolve "vue-demi" (mark it as external to exclude it from the bundle, or surround it with try/catch to handle the failure at run-time) 4:25:43 PM: 636 │ require("vue-demi").set(...args); 4:25:43 PM: ╵ ~~~~~~~~~~ 4:25:43 PM: .netlify/functions-internal/server/node_modules/vue-demi/package.json:18:17: note: The module "./lib/index.cjs" was not found on the file system 4:25:43 PM: 18 │ "require": "./lib/index.cjs", 4:25:43 PM: ╵ ~~~~~~~~~~~~~~~~~ 4:25:43 PM:

[antfu]

Can you share a minimal reproduction? Thanks.

[Joaojack]

Of course, sorry i'm still a beginner. Here is my repo : https://github.com/Joaojack/Nuxt3-x-tailwindcss-app-example
FYI it works fine on localhost, no problem when running npm run dev or npm run build here.
On Netlify my build command is nuxt build, and the publish repository is dist.

[Joaojack]

Here is a more precise view of the error if it can help https://i.imgur.com/KI5dKuZ.png

[antfu]

I guess this is because Netlify functions do not run the postinstall hook that vue-demi relies on. Need some help if anyone knows better of how to fix this.

[didavid61202]

hacky fix:
change Netlify's build command to yarn build && cp node_modules/vue-demi/lib/index.cjs .netlify/functions-internal/server/node_modules/vue-demi/lib/index.cjs. which copy index.cjs from root node-modules to server node_modules.

@antfu seems like when we build .output/ locally with nitro (which is trim by @vercel/nft to keep only used files in node_module?), .output/server/vue-demi/lib/index.cjs was kept. But when build on Netlify, .output/server/vue-demi/lib/index.mjs was kept instead of .cjs (cause by change of import/require statement difference locally vs on Netlify?)

not sure why it's the case, maybe someone knows more about module system could help. Thanks!

[Joaojack]

@didavid61202 your hacky fix worked indeed for me thanks :)