Push ecommerce data into a data layer array using JavaScript

Eccommerce Event Tracking.js

<script type="text/javascript">
  var cartProducts = [];
  var dataLayer = [];
                        
  for(var i=0; i<x; i++){                 
  cartProducts.push({
    'id': transactionId,
    'sku': sku[i],       // string; product ID
    'name': name[i],      // string; product name
    'category': category[i],  // string; category name
    'price': price[i],     // string; product price without tax and shipping
    'quantity': quantity[i]   // string: item count
  });}

  dataLayer.push({
    'transactionId': transactionId,
    'transactionAffiliation' : transactionAffiliation,
    'transactionTotal': transactionTotal, // total price,
    'transactionTax': transactionTax,   // float; tax; number rounded to 2 decimal places
    'transactionShipping': transactionShipping,          // float; shipping price; number rounded to 2 decimal places
    'transactionProducts': cartProducts,
    'event': 'trackTrans'});
  </script>