Function stepDecimals

src/components/common/Preview/PreviewSlider.jsx:5–9

(step)

const clamp = (val, min, max) => Math.min(Math.max(val, min), max);
const stepDecimals = (step) => {
  const s = step.toString();
  const dot = s.indexOf('.');
  return dot === -1 ? 0 : s.length - dot - 1;
};
const roundToStep = (val, step, min) => {
  const raw = Math.round((val - min) / step) * step + min;
  const decimals = Math.max(stepDecimals(step), stepDecimals(min));