I have used bitcoin-core package in node js to get the information about the block detail using rpc command.

For example:

var Client = require('bitcoin-core');

const client = new Client({ headers:'false', host:'127.0.0.1', network:'testnet', password:'xxxx',port:'18332', ssl: {
    enabled: false,
    strict: false
  }, timeout:'3000', username:'xxxx' });

client.getBlockchainInformation().then((help) => console.log(help));

It throws below mentioned error:

unhandled rejection rpcerror: not found

Any solution for this.

Thanks in advance.