Create a Bitcoin wallet

create-wallet.js

var bitcoin = require('bitcoinjs-lib');

document.getElementById("generate-wallet").addEventListener("click", function(event) {

  var seedString = document.getElementById("brainwallet-seed").value;
  seed = bitcoin.crypto.sha256(seedString);
  wallet = new bitcoin.Wallet(seed, bitcoin.networks.testnet);
  address = wallet.generateAddress();
  document.getElementById("wallet-address").innerHTML = address;

});