JSFiddle - React, Tailwind, and code Playground

HTML

<p>Testing __defineSetter__ call.</p>
<p>Did you get an alert?</p>

CSS

span {
    font-weight: bold;
}

p.activated span {
    display: none;
}

JavaScript

Object.prototype.__defineSetter__('Id', function(obj){alert(obj);});

var trigger = [{"Id":1}];

// This will cause an alert dialog.
trigger.Id = 123;