get-bandcamp-album-length.js

// go to Bandcamp album page, open dev console (f12), paste and run

function get() {
  const rows = document.querySelectorAll("tr.track_row_view");

  let tracks = 0;
  let hours = 0;
  let minutes = 0;
  let seconds = 0;

  for (const row of rows) {
    time = row.querySelector(".time")?.innerText;
    if (time && time.includes(":")) {
      tracks++;
      minutes += parseInt(time.split(":")[0]);
      seconds += parseInt(time.split(":")[1]);
    }
  }

  minutes += Math.floor(seconds / 60);
  seconds = seconds % 60;
  hours = Math.floor(minutes / 60);
  minutes = minutes % 60;

  hours = String(hours).padStart(2, "0");
  minutes = String(minutes).padStart(2, "0");
  seconds = String(seconds).padStart(2, "0");

  return `🎬 ${tracks} tracks ⌛ ${hours}:${minutes}:${seconds} length`;
}

get();