JSFiddle - React, Tailwind, and code Playground

JavaScript

var cow = "purple";

var f = function (x) 
{
    var r = 0;
    cow = "glue";
    if ( x > 3 )
    {       
        var cow = 1;
        r = 7;
    }
    return  r;
};

var z = f(5);
alert(cow);