format-number.js

/**
 * Formats a number using compact notation with at most one decimal place (e.g., 1.2M or 123K).
 *
 * @param amount - The number to format.
 * @returns The formatted number as a string.
 */
function formatNumber(amount) {
  return new Intl.NumberFormat('en-US', {
    notation: 'compact',
    maximumFractionDigits: 1,
  }).format(amount);
}

/**
 * Formats a dollar currency with no decimal places (e.g., $123).
 *
 * @param amount - The number to format.
 * @returns The formatted number as a string.
 */
function formatCurrency(amount) {
  return new Intl.NumberFormat('en-US', {
    style: 'currency',
    currency: 'USD',
    minimumFractionDigits: 0,
    maximumFractionDigits: 0,
  }).format(amount);
}