JSFiddle - React, Tailwind, and code Playground

HTML

<span id="s"></span>
<br>
<span id="s2"></span>
<br>
<hr/>! <span id="areEqual"></span>
<br>! <span id="jsonParse"></span>
<br>! <span id="eval"></span>
<br>! <span> end </span>

JavaScript

var s1 = "{\"x\":\"y:z\"}"

var o = JSON.parse(s1)
var s2 = JSON.stringify(o)

$('span#s').text(s1);
$('span#s2').text(s2);

if (s1 === s2) {
    $('span#areEqual').text('s1 === s2')
} else {
    $('span#areEqual').text('s1 !== s2')
}

var tt=JSON.parse(s2) // okay

$('span#jsonParse').text("JSON.parse(s2) okay")
alert (tt.x);
//eval(s2) // bad mojo!
 
$('span#eval').text(tt.x);