doevisualizations/doeVisualization/node_modules/d3-format/src/precisionPrefix.js

Data Visualization Library based on RequireJS and D3.js (v4+)

import exponent from "./exponent";

export default function(step, value) {
  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
}