parse bigint

parse-bigint.js

// 1 July 2024
// parseBigInt

function parseBigInt(b, r) {
  var n = String(b).split("n")[0];
  return parseInt(n, r);
}

var base10 = ["2n.3", "5.5", "FFnA", "n.3"].map(function (v, i) {
  return parseBigInt(v, 8);
});

var base16 = ["9n.3", "15.5", "FFnA", "n.3"].map(function (v, i) {
  return parseBigInt(v, 16);
});

var bigInts = [ BigInt(54321), BigInt(121345) ];

[].concat(base10, base16, bigInts).join(", ");