Ajaxsend버튼 실행시 에러_해당 소스추가로 올립니다.

[소스명 : form.html]

<!doctype html>

<html>

<head>

<title>email form</title>

</head>

<body>

email : <input type="text" name="email"><br/>

</form>

<button class="ajaxsend">ajaxsend</button>

document.querySelector('.ajaxsend').addEventListener('click',function() {

var inputdata = document.forms[0].elements[0].value;

sendAjax('http://127.0.0.1:3000/ajax_send_email', inputdata);

})

function sendAjax(url, data) {

var data = {'email' : data};

data = JSON.stringify(data);

var xhr = new XMLHttpRequest();

xhr.open('POST',url);

xhr.setRequestHeader('Content-Type', "application/json");

xhr.send(data);

xhr.addEventListener('load', function() {

console.log(xhr.responseText);

// var result = xhr.responseText;

var result = JSON.parse(xhr.responseText);

// document.querySelector(".result").innerHTML="dsfds";

if(result.result !== "ok") return;

document.querySelector(".result").innerHTML=result.email;

});

}

</script>

</body>

</html>

================

[소스명 : app.js]

var express = require('express')

var app = express()

var bodyParser = require('body-parser')

var cors = require('cors')

app.listen(3000, function() {

console.log("start, express server on port 3000");

});

app.use(express.static('public'))

app.use(bodyParser.json())

app.use(bodyParser.urlencoded({extended:true}))

app.set('view engine', 'ejs')

app.use(cors())

//url routing

app.get('/', function(req,res) {

console.log('test');

res.sendFile(__dirname+"/public/main.html")

});

app.get('/main', function(req,res) {

res.sendFile(__dirname+"/public/main.html")

})

app.post('/email_post', function(req,res) {

console.log(req.body.email)

// res.send("post response")

//res.send("<h1>welcome " + req.body.email + "</h1>")

res.render('email.ejs', {'email' : req.body.email})

})

app.post('/ajax_send_email', function(req, res) {

console.log(req.body.email)

var responsData = {'result' : 'ok', 'email' : req.body.email};

res.json(responseData);

})

=================

[커멘트창에서 에러화면입니다]

pykoook@naver.com

ReferenceError: responseData is not defined

at C:\users\kosmo\server-side-script\app.js:37:11

at Layer.handle [as handle_request] (C:\users\kosmo\server-side-script\node_modules\express\lib\router\layer.js:95:5)

at next (C:\users\kosmo\server-side-script\node_modules\express\lib\router\route.js:137:13)

at Route.dispatch (C:\users\kosmo\server-side-script\node_modules\express\lib\router\route.js:112:3)

at Layer.handle [as handle_request] (C:\users\kosmo\server-side-script\node_modules\express\lib\router\layer.js:95:5)

at C:\users\kosmo\server-side-script\node_modules\express\lib\router\index.js:281:22

at Function.process_params (C:\users\kosmo\server-side-script\node_modules\express\lib\router\index.js:335:12)

at next (C:\users\kosmo\server-side-script\node_modules\express\lib\router\index.js:275:10)

at cors (C:\users\kosmo\server-side-script\node_modules\cors\lib\index.js:188:7)

at C:\users\kosmo\server-side-script\node_modules\cors\lib\index.js:224:17