JSFiddle - React, Tailwind, and code Playground

JavaScript

main()

function main()
{
    var name = "bob";
    doSomething(function()
    {
        if (false)
        {
            var name = "fred";
        }
        
        // Were you expecting it to be "bob"?!
        alert(name);
    });
}

function doSomething(callbackFunction)
{
    callbackFunction();   
}