Example with ethers.js (Ethereum Wallet)

wallet.js

const ethers = require('ethers')

const standardPath = "m/44'/60'/0'/0";
const activeIndex: number = 0;

function generatePath() {
  const path = `${standardPath}/${activeIndex}`;
  return path;
}

function generateMnemonic() {
  const entropy = ethers.utils.randomBytes(16);
  const mnemonic = ethers.utils.HDNode.entropyToMnemonic(entropy);
  return mnemonic;
}


function createWallet() {
  const mnemonic = generateMnemonic();
  const path = generatePath();
  const account = ethers.Wallet.fromMnemonic(mnemonic, path);

  return account;
}

HI - Wouldn't one want some ability to increment the activeIndex value? ...in the case of using multiple wallets (accounts) from the same mnemonic