Download counts for react-router

download-counts.mjs

const npmApiUrl = "https://api.npmjs.org/downloads/point";

async function fetchDownloadCounts(packageName, year) {
  let range = `${year}-01-01:${year}-12-31`;
  let response = await fetch(`${npmApiUrl}/${range}/${packageName}`);
  return (await response.json()).downloads;
}

async function getDownloads(startYear, endYear = startYear) {
  if (endYear < startYear) {
    throw new Error(
      `End year (${endYear}) must be before start year (${startYear})`
    );
  }

  let years = [];
  for (let year = startYear; year <= endYear; year += 1) {
    years.push(year);
  }

  let downloadCounts = await Promise.all(
    years.map(year => fetchDownloadCounts("react-router", year))
  );

  let totalDownloads = downloadCounts.reduce((memo, n) => memo + n);

  return totalDownloads.toLocaleString();
}

getDownloads(2015, 2022).then(downloads => console.log(downloads));