express throws error as `body-parser deprecated undefined extended`

Question

In my node app, I am using express. all works fine, But i am getting error in the cmd. I use all are updated modules...

my code :

var express = require('express');
var bodyParser = require('body-parser');
var jade = require('jade');
var app = express();
app.set('view engine', 'jade');
app.set('views', __dirname + '/views');
app.use(express.static(__dirname + '/public'));


app.use(bodyParser.json()); // to support JSON-encoded bodies
app.use(bodyParser.urlencoded()); // to support URL-encoded bodies


app.get('/',function(req,res){
    res.render('index.jade');
});

app.get('/login',function(req,res){
    res.render('index.jade');
});

app.post('/login',function(req,res){
    console.log(req.body);
});

app.get('/signup',function(req,res){
    res.render('signup.jade');
});

var env = process.env.PORT || 3000;


app.listen(env, function(req, res){
    console.log('i am working!');
});

Error:

D:\myLogin>node app
body-parser deprecated undefined extended: provide extended option app.js:11:20 //why i am getting this?
i am working!
{ username: 'jbarif@gmail.com', password: 'pass' } // i am getting response

Can any help me to understand this issue please?

@RamprasathSelvam - may something wrong with your code, version of module or integration, please check — 3gwebtrain, Oct 04 '18 at 12:39
Where do we vote for the worst error message ever? Especially considering this is highly likely to happen, the message just looks like a bag of random words. — spechter, Jul 29 '20 at 06:37

mscdex · Accepted Answer · 2020-02-02T09:02:33.797

421

You have to explicitly set extended for bodyParser.urlencoded() since the default value is going to change in the next major version of body-parser. Example:

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

Since express 4.16.0, you can also do:

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

edited Feb 02 '20 at 09:02

answered Aug 24 '14 at 12:57

mscdex

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@SamarthAgarwal According to the [readme](https://github.com/expressjs/body-parser/tree/3f1b02247702c2966d33ee73610a98d54cf32fe8#bodyparserurlencodedoptions), it uses the `qs` module to parse the body which allows for a nested array like syntax to be parsed such as `test[foo][bar]=baz` (which becomes `{'test': {'foo': {'bar': 'baz'}}}`) – Bailey Parker Jul 11 '15 at 03:35
@BaileyParker is your comment related to the `extended:true` expression? I think that the expression is nested. – Timo Mar 27 '21 at 09:41

score 78 · Answer 2 · edited Sep 30 '19 at 09:00

78

Attention: With express version => 4.16.0 the body-parser middleware was added back under the methods express.urlencoded() and express.json()

Which can be used as:

app.use(express.urlencoded({extended: true})); 
app.use(express.json());

edited Sep 30 '19 at 09:00

ambianBeing

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answered Apr 07 '18 at 06:35

Dhiral Kaniya

1,941
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2

so, no need of `npm i body-parser` ? – Rohit Nishad Jun 30 '21 at 10:55
2

That is correct, do not install body-parser, it's already included – David Sep 01 '21 at 12:05

score 19 · Answer 3 · answered Aug 24 '14 at 12:56

19

The error says you need to provide the extended option for the body-parser like so:

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

answered Aug 24 '14 at 12:56

mfreitas

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score 11 · Answer 4 · edited Oct 17 '21 at 18:57

Don't use body-parser

It's now built-in with new versions of Express, you can access request body just like this only using express:

app.use(express.urlencoded({extended: true}));
app.use(express.json()) // To parse the incoming requests with JSON payloads

Hence, you can now uninstall body-parser using npm uninstall body-parser

To get the POST content, you can use req.body

app.post("/yourpath", (req, res)=>{

    var postData = req.body;

    //Or if this doesn't work

    var postData = JSON.parse(req.body);
});

tMan44wiz · Answer 5 · 2022-04-05T08:28:33.803

7

As from Express version 4.16.0, you're expected to pass in extended property inside the bodyParser.urlencoded()

//  parse JSON-encoded bodies and URL-encoded bodies
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

See npm.js documentation page for sample: https://www.npmjs.com/package/body-parser#expressconnect-top-level-generic

If you're using Node v16.xx.x and "express": "^4.17.x" and above, there is no need again to use bodyPerser. It is now incorporated with express by default. Simply do the following below:

//  parse JSON-encoded bodies and URL-encoded bodies
app.use(express.json());
app.use(express.urlencoded({ extended: false }));

edited Apr 05 '22 at 08:28

answered Apr 13 '20 at 19:27

tMan44wiz

126
1
5

bodyParser is depriciated still getting this warning – Zain Ul Abidin Mar 19 '21 at 10:07
This helped me, I was confused because after removing body-parser from my app I was still seeing this error. – robm Jan 20 '22 at 02:54
1

@ZainUlAbidin you don't need Body-Parser anymore inasmuch as you're using a version of Node v16.xx.x and Express: ^4.17.x – tMan44wiz Mar 31 '23 at 16:07

score 7 · Answer 6 · answered May 22 '21 at 13:27

7

If you facing 'bodyParser' is deprecated.

Just do

app.use(express.urlencoded({extended: true})); 
app.use(express.json());

Note: If you are using 4.16.0 or later express version.

answered May 22 '21 at 13:27

Happy Patel

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tMan44wiz · Answer 7 · 2022-04-05T08:24:10.373

1

If you're using Node v16.xx.x and "express": "^4.17.x", there is no need again to use bodyPerser. It is now incoporated with Express by default. Simply do the following below:

//  parse JSON-encoded bodies and URL-encoded bodies
app.use(express.json());
app.use(express.urlencoded({ extended: false }));

edited Apr 05 '22 at 08:24

answered Apr 13 '20 at 19:19

tMan44wiz

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5

score 1 · Answer 8 · edited Apr 28 '21 at 07:40

1

If you are using node version v13.12.0:

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

edited Apr 28 '21 at 07:40

Lee Goddard

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answered May 31 '20 at 11:26

SüŽan Bhattarai

19
2

Today's date has no bearing on what version of Node someone is using. – Ghostrydr Feb 19 '21 at 05:11
This is the only approach that works. Sadly, I saw it in very few blog posts, forums, etc., and the amount of confusion regarding this is through the roof! – ankush981 Mar 17 '21 at 09:31

score 1 · Answer 9 · answered Oct 19 '21 at 07:04

1

You don`t need "body-parser" explicitly installed now. This will work

app.use(express.json());

answered Oct 19 '21 at 07:04

Amit Baderia

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score 0 · Answer 10 · edited Dec 29 '20 at 01:33

0

if you are here after christmas from 2020 you just have to put the midlawares in order before your express declaretion and after the routes declarationenter image description here

edited Dec 29 '20 at 01:33

Dharman

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answered Dec 29 '20 at 01:27

Dario Coronel

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score 0 · Answer 11 · edited Jul 26 '23 at 09:40

0

You don't need to use body-parser anymore.

In the new version of express.js, this option of parsing is available.

app.use(express.json());
app.use(express.urlencoded({ extended: true }));

edited Jul 26 '23 at 09:40

Tyler2P

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answered Jul 22 '23 at 13:05

mohammadreza hayati

1
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Gowtham Sooryaraj · Answer 12 · 2019-05-01T13:22:15.563

-1

Set limit 50 MB for avoid data handling error., In urlencode limit 50mb is for help you to pass imageData throw url

  app.use(bodyParser.json({
        limit : '50mb'    ///////// LIMIT for JSON
      }));

    app.use(bodyParser.urlencoded({
        limit : '50mb', ///////// LIMIT for URL ENCODE (image data)
        extended : true
      }));

edited May 01 '19 at 13:22

answered May 01 '19 at 12:57

Gowtham Sooryaraj

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express throws error as `body-parser deprecated undefined extended`

12 Answers12

Don't use body-parser

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