JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://www.broofa.com/Tools/JSLitmus/JSLitmus.js"></script>
<div id='jslitmus_container'></div>

JavaScript

JSLitmus.test('Solution1', function() {
    var x = 10;
    var y = 5;    
    x = x + y;
    y = x - y;
    x = x - y;
});

JSLitmus.test('Solution2', function() {
    var x = 10;
    var y = 5;
    x = y + x, y = x - y, x = x - y;
});

JSLitmus.test('Solution3', function() {
    var x = 10;
    var y = 5;
    x ^= y;
    y ^= x;
    x ^= y;
});