extension/version.mjs

export function updateState(installed, latest) {
  const parse = value => typeof value === 'string' && /^\d+(\.\d+){0,3}$/.test(value) ? value.split('.').map(Number) : null;
  const a = parse(installed), b = parse(latest);
  if (!a || !b) return '';
  for (let i = 0; i < 4; i++) {
    if ((a[i] || 0) < (b[i] || 0)) return 'Update available';
    if ((a[i] || 0) > (b[i] || 0)) return '';
  }
  return '';
}