JSFiddle - React, Tailwind, and code Playground

HTML

<body>Here
    <p id="demo"></p>
</body>

JavaScript

function checkPos(input, callback) {
    if (input > 0)
    function () {
        callback(true);
    } else
    function () {
        callback(false);
    }
}

function dosomething(number) {
    var diff = 10 - number;
    checkPos(diff, function (e) {
        return e;
    });
}

var count = 1;
var multiplier = 6;
var result;
if (dosomething(11)) result = 5 + count
else result = 5 - count

document.getElementById("demo").innerHTML = String(result*multiplier);