JSFiddle - React, Tailwind, and code Playground

HTML

<body>
</body>

JavaScript

var items2= {};
var items = {"Id":"car","color":"blue"};
var items2 = {"Id":"car","color":"blue"};
items.Id = 'Abc';

/* 
items.forEach(function(item) {
  if (newItem.Id === item.Id) {
    item.color = newItem.color
  }
}) */
console.log('items',items , 'items2' , items2);

$('body').html(JSON.stringify(items));