Package path . is not exported from package /home/.../node_modules/libp2p

[reubenfirmin]

I cannot get to the hello world point with https://github.com/libp2p/js-libp2p/blob/master/doc/GETTING_STARTED.md.

rm -fr node_modules/
npm install
npm install libp2p
npm install @libp2p/websockets
npm run build

This yields an error:

Module not found: Error: Package path . is not exported from package /home/.../node_modules/libp2p (see exports field in /home/.../node_modules/libp2p/package.json)

It set up package.json with:

  "dependencies": {
    "@libp2p/websockets": "^6.0.1",
    "libp2p": "^0.45.4"
  },

My code is (typescript):

import { createLibp2p } from 'libp2p';
import {webSockets} from "@libp2p/websockets";

export class PeerSyncer {

    constructor(private identity: any) {}

    async start(): Promise<void> {

        const libp2p = await createLibp2p({
            // addresses: {
            //     listen: ['/ip4/0.0.0.0/tcp/0', '/ip4/0.0.0.0/tcp/0/ws']
            // },
            // transports: [webSockets()]
        });
    }
}

Commenting out the call to createLibp2p allows it to build, presumably because the tree shaker gets rid of the import.

npm --version
9.6.5

[maschad]

Could you share your tsconfig.json and the node version as well? We define the export types here

[reubenfirmin]

tsconfig:

{
  "compilerOptions": {
    "strict": true,
    "module": "commonjs",
    "target": "es6",
    "esModuleInterop": true,
    "sourceMap": true,
    "rootDir": "src",
    "outDir": "dist/js",
    "noEmitOnError": true,
    "typeRoots": [ "node_modules/@types" ],
    "jsx": "react"
  }
}

node --version
v18.16.0

[achingbrain]

"module": "commonjs",
"target": "es6"

libp2p is an ESM-only module, this configuration option uses the wrong module system - please change it to use ESM:

{
  "compilerOptions": {
    "module": "ES2022",
    "esModuleInterop": true,
    "target": "ES2022",
    "moduleResolution": "node"
  }
}

[reubenfirmin]

@achingbrain OK, can you specify that in getting started then?

https://github.com/libp2p/js-libp2p/blob/master/doc/GETTING_STARTED.md

[maschad]

@achingbrain OK, can you specify that in getting started then?

master/doc/GETTING_STARTED.md

Good suggestion I created a PR #1782 to address that.