JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-2.0.0.js"></script>
<li data-bind="attr: { 'data-product-id': id }" id="myID">

JavaScript

var vm ={ id:'myID-product'};

ko.applyBindings(vm);

var element = $("#myID").data("product-id");
         
console.log(element);