now, I can use those code to get a instance of JsSignatureProvider

const signatureProvider = new JsSignatureProvider.default(privateKeys);

but, i can't get instance of JsonRpc:

const {Api, JsonRpc} = require('eosjs');

const fetch = require('node-fetch');

const rpc = new JsonRpc('http://127.0.0.1:8888', { fetch });

//  const rpc = new JsonRpc.default('http://127.0.0.1:8888', { fetch });

I get a error 'JsonRpc is not a constructor', how can i solve it ?

@Mc01 I'll look into this next week. I want to run through some tests with various environments to figure out the most intuitive way to import and initialize these classes. We want to ensure EOSJS is compatible with a transpiled web bundle, vanilla JS browser code, and NodeJS code out of the box. We don't have tests yet for the latter, so I want to take a deeper look into this before approving the change. Good job taking initiative on this though.

We will be pushing a patch in the near future to remove the usage of default exports altogether to keep import syntax as consistent as possible across all environments.