Question NodeJS - Execute ESM code

[pierreP]

Hello,

Is it possible to execute ESM javascript code ?

I try to use SvelteKit which generates ESM code but it seems that only CSJ is possible.
I use NodeJS 16 (I added it to Plesk).

You can find mode info about the bug here : [adapter-node] Cannot use import statement outside a module · Issue #2410 · sveltejs/kit .

 

[strepsil]

I had exactly the same issue, resolved by adding the following (as index.cjs) to my build output and pointing plesk at that (having created a package.json with "type": "module" in the build output too):

(async () => { await import('./index.js'); })();

 

[pierreP]

Thank you strepsil !

 

[strepsil]

In-fact, its simplified as:
(() => import('./index.js'))();

This allows plesk to serve pages, but unclear if the swallowing of async is indicating to Plesk that the site is ready sooner than ideally. But it's working for me.

 

[pierreP]

It's very important to add this nginx configuration to avoid security leak :

location ~ /(server) {
   deny all;
   return 404;
}

See SECURITY - restrict `server` folder in deployment · Issue #9477 · sveltejs/kit

 

[pierreP]

It's very important to add this nginx configuration to avoid security leak :

location ~ /(server) {
   deny all;
   return 404;
}

See SECURITY - restrict `server` folder in deployment · Issue #9477 · sveltejs/kit

Better config :

location ~ /(server|client|tmp|node_modules|env\.js|handle\.js|shims.js|index\.js) {
    deny all;
    return 404;
}