@livelike/react-native/src/utils/number.ts

LiveLike React Native package

export function abbrevNum(num: number) {
  const unitSymbols = ['', 'k', 'M'];
  const tier = (Math.log10(num) / 3) | 0;
  if (tier == 0) return num;
  const scaled = num / Math.pow(10, tier * 3);
  // Check if number is whole or above 100k so '.0' doesn't get added.
  const wholeOrThreeDigit = scaled % 1 === 0 || scaled >= 10 ? 0 : 1;
  return scaled.toFixed(wholeOrThreeDigit) + unitSymbols[tier];
}

export function roundTo(num: number, decimalPlaces: number) {
  const roundToFactor = Math.pow(10, decimalPlaces);
  return Math.round(num * roundToFactor) / roundToFactor;
}