TypeError [ERR_INVALID_ARG_TYPE]: The "chunk" argument must be of type string or an instance of Buffer or Uint8Array. Received undefined
var http=require('http')
var fs=require('fs')
http.createServer(function (req,res) {
fs.readFile("sampleServer.html",function(err,data){
res.writeHead(200,{'Content-Type':'text/html'})
res.write(data)
res.end()
})
}).listen(7000)
I found my mistake.
I run this like: node ./folder/sample.js.
After this, I enter to the folder using cd
folder> node ./sample.js
this time my errors are fixed.