JavaScript에서 날짜를 ISO 8601 문자열로 형식화하는 방법은 무엇입니까?

const date = new Date();
const isoDate = date.toISOString();

"2023-05-24T16:03:45.123Z"

if (!Date.prototype.toISOString) {
  (function() {
    function pad(number) {
      var r = String(number);
      if (r.length === 1) {
        r = '0' + r;
      }
      return r;
    }

    Date.prototype.toISOString = function() {
      return this.getUTCFullYear() +
        '-' + pad(this.getUTCMonth() + 1) +
        '-' + pad(this.getUTCDate()) +
        'T' + pad(this.getUTCHours()) +
        ':' + pad(this.getUTCMinutes()) +
        ':' + pad(this.getUTCSeconds()) +
        '.' + String((this.getUTCMilliseconds() / 1000).toFixed(3)).slice(2, 5) +
        'Z';
    };
  }());
}

console.log(new Date().toISOString());