Password Generator bookmarklet

javascript:/*Password Generator*/
  ((g, n, l, u, s, c, f, e) => {
    while (true) {
      if ((g = prompt("Please enter the number of characters to generate.", 15)) === null) return;
      if (isNaN(g = parseInt(g)) || (g <= 0)) {
        alert("Input must be a positive integer number.")
      } else break
    }
    n = "0123456789";
    u = (l = "abcdefghijklmnopqrstuvwxyz").toUpperCase();
    s = "!\"#$%&'()*+,-./:;<=>?@[\]^_`{|}~";
    c = {
      "Numbers": n,
      "Numbers & Lowercase Alphabets": n + l,
      "Numbers & Upperercase Alphabets": n + u,
      "Numbers & Alphabets": n + l + u,
      "Numbers & Symbols": n + s,
      "Numbers & Alphabets & Symbols": n + l + u + s,
      "Lowercase Alphabets": l,
      "Lowercase Alphabets & Symbols": l + s,
      "Upperercase Alphabets": u,
      "Upperercase Alphabets & Symbols": l + s,
      "Alphabets": l + u,
      "Alphabets & Symbols": l + u + s,
      "Symbols": s
    };
    f = (o, a, i, r) => {
      (a = []).length = g;
      for (i = 0; i < g; i++) a[i] = o[1][(Math.random() * o[1].length) << 0];
      e.textContent = a.join("");
      return `<tr><td>${o[0]}</td><td>${e.innerHTML}</td></tr>`
    };
    (e = document.createElement("DIV")).id = "pgbookmarklet";
    e.innerHTML = `<style>
#pgbookmarklet,#pgbookmarklet *{all:revert}
#pgbookmarklet{position:fixed;left:0;top:0;right:0;bottom:0;background:rgb(0,0,0,.5);cursor:pointer;font:14pt/normal sans-serif}
#pgbookmarklet table{transform:translateY(10%);margin:auto;border-radius:.6em;border-spacing:.3em;padding:.3em;background:#fff;cursor:auto}
#pgbookmarklet tr:nth-child(2n+1){background:#ddf}
#pgbookmarklet td{padding:.3em}
</style><table>${Object.entries(c).map(f).join("\n")}</table>`;
    document.documentElement.insertAdjacentHTML("beforeend", e.outerHTML);
    pgbookmarklet.onclick = e => (e.target === pgbookmarklet) && pgbookmarklet.remove()
  })()