getUnspentUtxos-bitcore.js

var Bitcore = require('bitcore');
var Insight = require('bitcore-explorers').Insight;
var insight = new Insight();

insight.getUnspentUtxos('12S3tMNDJAnwPCcKwwQRgtPuiUs5sSkgHg', function(err, utxos) {
  if (err) {
    // Handle errors...
  } else {
    // Maybe use the UTXOs to create a transaction
    console.log(utxos);

    var transaction = new Bitcore.Transaction()
        .from(utxos)          // Feed information about what unspent outputs one can use
        .to("1DZbtLjNNz2tk3hy7EGfksSTvx7B1esbBU", 1);

    console.log(transaction);
  }
});