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: '[email protected]', 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
– 3gwebtrain, Commented Oct 4, 2018 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
– spechter, Commented Jul 29, 2020 at 6:37

mscdex · Accepted Answer · 2020-02-02 09:02:33Z

442

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 2, 2020 at 9:02

answered Aug 24, 2014 at 12:57

mscdex

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3 Comments

Bailey Parker Over a year ago

@SamarthAgarwal According to the readme, 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'}}})

Timo Over a year ago

@BaileyParker is your comment related to the extended:true expression? I think that the expression is nested.

Nor.Z Over a year ago

For its meaning, see: \ node.js - What is the meaning of "bodyParser.urlencoded({ extended: true }))" and "bodyParser.json()" in Express.js? - Stack Overflow \ stackoverflow.com/questions/55558402/…

ambianBeing · Accepted Answer · 2019-09-30 09:00:47Z

83

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, 2019 at 9:00

ambianBeing

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answered Apr 7, 2018 at 6:35

Dhiral Kaniya

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2 Comments

Rohit Nishad Over a year ago

so, no need of npm i body-parser ?

David Over a year ago

That is correct, do not install body-parser, it's already included

mfreitas · Accepted Answer · 2014-08-24 12:56:53Z

21

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, 2014 at 12:56

mfreitas

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Comments

Dharman · Accepted Answer · 2021-10-17 18:57:18Z

13

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);
});

edited Oct 17, 2021 at 18:57

Dharman♦

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answered Oct 17, 2021 at 18:52

Abraham

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Comments

Happy Patel · Accepted Answer · 2021-05-22 13:27:06Z

8

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, 2021 at 13:27

Happy Patel

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Comments

tMan44wiz · Accepted Answer · 2022-04-05 08:28:33Z

8

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 5, 2022 at 8:28

answered Apr 13, 2020 at 19:27

tMan44wiz

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3 Comments

Zain Ul Abidin Over a year ago

bodyParser is depriciated still getting this warning

robm Over a year ago

This helped me, I was confused because after removing body-parser from my app I was still seeing this error.

tMan44wiz Over a year ago

@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

Anbuselvan Annamalai · Accepted Answer · 2024-02-28 10:22:59Z

3

If you're using Node v16.xx.x and "express": "^4.17.x", there is no need again to use bodyParser. 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 Feb 28, 2024 at 10:22

Anbuselvan Annamalai

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answered Apr 13, 2020 at 19:19

tMan44wiz

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Comments

Lee Goddard · Accepted Answer · 2021-04-28 07:40:54Z

2

If you are using node version v13.12.0:

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

edited Apr 28, 2021 at 7:40

Lee Goddard

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answered May 31, 2020 at 11:26

SüŽan Bhattarai

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2 Comments

Ghostrydr Over a year ago

Today's date has no bearing on what version of Node someone is using.

ankush981 Over a year ago

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!

Amit Baderia · Accepted Answer · 2021-10-19 07:04:18Z

2

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

app.use(express.json());

answered Oct 19, 2021 at 7:04

Amit Baderia

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Comments

Tyler2P · Accepted Answer · 2023-07-26 09:40:54Z

1

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, 2023 at 9:40

Tyler2P

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answered Jul 22, 2023 at 13:05

mohammadreza hayati

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Comments

Dharman · Accepted Answer · 2020-12-29 01:33:15Z

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, 2020 at 1:33

Dharman♦

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answered Dec 29, 2020 at 1:27

Dario Coronel

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Comments

C.HA · Accepted Answer · 2024-11-18 00:46:39Z

0

I found this error recently and wanted to add some solution which I found. The error body-parser deprecated undefined extended: provide extended option

If you're using body-parser:

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

For Express 4.16.0+ (no need for body-parser):

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

PS: Express library now includes urlencoded and json middleware, so body-parser is unnecessary.

answered Nov 18, 2024 at 0:46

C.HA

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Comments

Gowtham Sooryaraj · Accepted Answer · 2019-05-01 13:22:15Z

-2

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 1, 2019 at 13:22

answered May 1, 2019 at 12:57

Gowtham Sooryaraj

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