non-decimal non-integer stuff

floatradix.js

// like parseFloat, but takes an optional radix
function parseFloatWithRadix(s, r) {
  r = (r||10)|0;
  const [b,a] = ((s||'0') + '.').split('.');
  const l1 = parseInt('1'+(a||''), r).toString(r).length;
  return parseInt(b, r) + 
    parseInt(a||'0', r) / parseInt('1' + Array(l1).join('0'), r);
}

// like Number..toFixed, but takes an optional radix
function toFixed(n, p, r) {
  r = (r||10)|0;
  const m = parseInt('1' + Array(Math.abs((p||0)|0) + 1).join('0'), r), d = 1/m;
  if (p>0) ({m, d}={m:d, d:m});
  return (Math.round(parseFloatWithRadix(n, r) * d) * m).toString(r);
}