如何使用createWriteStream创建不带扩展名的文件？

const fs = require('fs');
const path = require('path');

const filePath = '/path/to/file';
const fileName = 'filename';

const writeStream = fs.createWriteStream(path.join(filePath, fileName));

writeStream.on('finish', () => {
  console.log('文件写入完成');
});

writeStream.on('error', (err) => {
  console.error('写入文件时发生错误：', err);
});

const fs = require('fs');
const path = require('path');

const filePath = '/path/to/file';
const fileName = 'filename';

const writeStream = fs.createWriteStream(path.join(filePath, fileName));

writeStream.on('finish', () => {
  console.log('文件写入完成');
});

writeStream.on('error', (err) => {
  console.error('写入文件时发生错误：', err);
});