javascript - "TypeError: res.sendStatus is not a function" why I am getting this error after sometime? - Stack

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I have installed 'express' using npm, I've successfully got port number listening on 3000. but after a while i got the following error,

TypeError: res.sendStatus is not a function

As we know, res.sendStatus(404) is related to express.but express is clearly located.

Here is source code in app.js

var express = require('express'),
app = express();

app.get('/', function(req, res){
  res.send('Hello Worlds');
});

app.use(function(req, res){
  res.sendStatus(404); 
});

var server = app.listen(3000, function() {
  var port = server.address().port;
 console.log('Express server listening on port %s', port);
});

Here is my full cmd output,

> $ node app.js
Express server listening on port 3000
TypeError: res.sendStatus is not a function
    at Object.handle (I:\mongoUniversity\hello_world_templates\app.js:14:9)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at pass (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\router\index.js:110:24)
    at Router._dispatch (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\router\index.js:173:5)
    at Object.router (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\router\index.js:33:10)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at Object.expressInit [as handle] (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\middleware.js:30:5)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at Object.query [as handle] (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\middleware\query.js:43:5)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at Function.app.handle (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:182:3)
    at Server.app (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\connect.js:67:37)
    at emitTwo (events.js:87:13)
    at Server.emit (events.js:172:7)
    at HTTPParser.parserOnIning [as onIning] (_http_server.js:525:12)
    at HTTPParser.parserOnHeadersComplete (_http_mon.js:88:23)

I have checked similar questions, where they told to check if 'express' was installed or not, but i have installed it correctly. Then what am i doing wrong?

I have installed 'express' using npm, I've successfully got port number listening on 3000. but after a while i got the following error,

TypeError: res.sendStatus is not a function

As we know, res.sendStatus(404) is related to express.but express is clearly located.

Here is source code in app.js

var express = require('express'),
app = express();

app.get('/', function(req, res){
  res.send('Hello Worlds');
});

app.use(function(req, res){
  res.sendStatus(404); 
});

var server = app.listen(3000, function() {
  var port = server.address().port;
 console.log('Express server listening on port %s', port);
});

Here is my full cmd output,

> $ node app.js
Express server listening on port 3000
TypeError: res.sendStatus is not a function
    at Object.handle (I:\mongoUniversity\hello_world_templates\app.js:14:9)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at pass (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\router\index.js:110:24)
    at Router._dispatch (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\router\index.js:173:5)
    at Object.router (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\router\index.js:33:10)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at Object.expressInit [as handle] (I:\mongoUniversity\hello_world_templates\node_modules\express\lib\middleware.js:30:5)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at Object.query [as handle] (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\middleware\query.js:43:5)
    at next (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:174:15)
    at Function.app.handle (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\proto.js:182:3)
    at Server.app (I:\mongoUniversity\hello_world_templates\node_modules\connect\lib\connect.js:67:37)
    at emitTwo (events.js:87:13)
    at Server.emit (events.js:172:7)
    at HTTPParser.parserOnIning [as onIning] (_http_server.js:525:12)
    at HTTPParser.parserOnHeadersComplete (_http_mon.js:88:23)

I have checked similar questions, where they told to check if 'express' was installed or not, but i have installed it correctly. Then what am i doing wrong?

• javascript
• node.js
• express

Share Follow edited Jun 12, 2017 at 5:23 Md. Nahiduzzaman Rose asked May 21, 2016 at 16:33 Md. Nahiduzzaman RoseMd. Nahiduzzaman Rose 44222 gold badges1010 silver badges2424 bronze badges 3

• 2 Check the version of express you're using. Only 4.x uses res.sendStatus. – Patrick Roberts Commented May 21, 2016 at 16:42
• Got fixed!, Thanks @PatrickRoberts I found that in "package.json" file the defined express version was 3.x (updated now), but i also globally installed express 4.13.4 version, so when i checked express version on mand line it always returned 4.x version, so i was less worried about the version. – Md. Nahiduzzaman Rose Commented May 21, 2016 at 16:55
• Express is not supposed to be installed globally, so try to avoid doing that. – Patrick Roberts Commented May 30, 2016 at 15:13

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2 Answers 2

Sorted by: Reset to default 8

Use express 4.x, since only the new express API supports res.sendStatus.

In my case, the parameters passed to the function was the issue. Adding next as as a parameter fixed it

app.use(function(req, res, next){
  res.sendStatus(404); 
});

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