JSFiddle - React, Tailwind, and code Playground

JavaScript

Number.prototype.toFixedSpecial = function(n) {
    var str = this.toFixed(n);
    if (str.indexOf('e+') < 0)
        return str;

    // if number is in scientific notation, pick (b)ase and (p)ower
    return str.replace('.', '').split('e+').reduce(function(p, b) {
        return p + Array(b - p.length + 2).join(0);
    }) + '.' + Array(n + 1).join(0);
};

var fixed = Number.MAX_VALUE.toFixedSpecial(2);

document.write( Number(fixed) === Number.MAX_VALUE );