Writing to a file from the console?

fs.writeFile('./public/library.js',obfuscationResult.getObfuscatedCode(),function(err){ fs.readFile('./public/library.js',"utf8",function(error,data){ var rl = readline.createInterface({ input:process.stdin, output:process.stdout }); rl.question('What do you think of Node.js? ', (answer) => { fs.writeFile('./public/library.js','/*\* JavaScript Library v'+answer); fs.appendFile('./public/library.js',data); rl.close(); }); }); });