在javascript中计算用户名和电子邮件之间的差异

const email = "username@example.com";
const [username, domain] = email.split("@");

const usernameLength = username.length;
const domainLength = domain.length;
const difference = Math.abs(usernameLength - domainLength);

return difference;

function calculateDifference(email) {
  const [username, domain] = email.split("@");
  const usernameLength = username.length;
  const domainLength = domain.length;
  const difference = Math.abs(usernameLength - domainLength);
  return difference;
}

const email = "username@example.com";
const difference = calculateDifference(email);
console.log(difference); // 输出：13