Node.js 写入流文件

"use strict";

const fs = require('fs')

var fileReadStream = fs.createReadStream('data.json');
var fileWriteStream = fs.createWriteStream('data-1.json');

var count = 0;
fileReadStream.once('data',(chunk) => {
  console.log(chunk.toString());
});

fileReadStream.on('data',(chunk) => {
  console.log(`${++count} 接收到: ${chunk.length}`);
  fileWriteStream.write(chunk);
});