Zcash: Send zcash to "t" address signed by WIF with nodejs script

Question

I need to send Zcash signed with WIF from nodejs.

I have a sample code but don't understand how to use whis.

Is there a simpest code or way to send zcash signed with WIF?

Thanks.

This is my code:

const bitcoinJSForks = require('bitcoinforksjs-lib');
const bitcoinZcash = require('bitcoinjs-lib-zcash');
const bitcoinPos = require('bitcoinjs-lib-pos');
const bitcoin = require('bitcoinjs-lib');
const utils = require('./utils');
const coinselect = require('coinselect');

// single sig
const transaction = (sendTo, changeAddress, wif, network, utxo, changeValue, spendValue, opreturn) => {
  let key = network.isZcash ? bitcoinZcash.ECPair.fromWIF(wif, network) : bitcoin.ECPair.fromWIF(wif, network);
  let tx;
  let btcFork = {};

  if (network.isZcash) {
    tx = new bitcoinZcash.TransactionBuilder(network);
  } else if (network.isPoS) {
    tx = new bitcoinPos.TransactionBuilder(network);
  } else if (network.isBtcFork) {
    tx = new bitcoinJSForks.TransactionBuilder(network);
    const keyPair = bitcoinJSForks.ECPair.fromWIF(wif, network);
    btcFork = {
      keyPair,
      pk: bitcoinJSForks.crypto.hash160(keyPair.getPublicKeyBuffer()),
      spk: bitcoinJSForks.script.pubKeyHash.output.encode(bitcoinJSForks.crypto.hash160(keyPair.getPublicKeyBuffer())),
    };
  } else {
    tx = new bitcoin.TransactionBuilder(network);
  }
}