如何在javascript中修剪前导和尾随逗号？

function trimCommas(str) {
  return str.replace(/,+/g, ',').trim();
}

const input = ",Hello,World,,,";
const result = trimCommas(input);
console.log(result); // 输出 "Hello,World"

function trimCommas(str) {
  return str.replace(/^,+|,+$/g, '');
}

const input = ",Hello,World,,,";
const result = trimCommas(input);
console.log(result); // 输出 "Hello,World"