npm ERR! Failed to parse package.json data. #2930

KenKennef · 2016-03-04T09:25:32Z

npm ERR! Windows_NT 10.0.10586
npm ERR! argv "C:\\Program Files (x86)\\nodejs\\node.exe" "C:\\Users\\KennethVoss\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install"
npm ERR! node v4.3.1
npm ERR! npm  v3.8.0
npm ERR! file C:\Users\KennethVoss\AppData\Roaming\npm-cache\inherits\2.0.1\package\package.json
npm ERR! code EJSONPARSE

npm ERR! Failed to parse json
npm ERR! No data, empty input at 1:1
npm ERR!
npm ERR! ^
npm ERR! File: C:\Users\KennethVoss\AppData\Roaming\npm-cache\inherits\2.0.1\package\package.json
npm ERR! Failed to parse package.json data.
npm ERR! package.json must be actual JSON, not just JavaScript.
npm ERR!
npm ERR! This is not a bug in npm.
npm ERR! Tell the package author to fix their package.json file. JSON.parse

The text was updated successfully, but these errors were encountered:

KenKennef · 2016-03-04T09:33:10Z

npm-debug.txt

tunniclm · 2016-03-04T12:09:55Z

Can you check the contents of file C:\Users\KennethVoss\AppData\Roaming\npm-cache\inherits\2.0.1\package\package.json? Is it actually empty, as the error is suggesting? It shouldn't be!

You may want to try npm cache clean and retry the install to see that helps.

KenKennef · 2016-03-04T13:42:33Z

Thanks tunniclm - the cache clean solved it! Thank you for a quick reply :)

Kenneth

Knighton910 · 2016-03-04T18:35:27Z

+1 @tunniclm

npm cache clean

jclwong · 2016-10-26T00:55:01Z

@tunniclm - Thanks

robaxelsen · 2016-11-03T18:51:18Z

+1 @tunniclm - thanks a lot!

chikehenderson · 2016-11-21T16:49:36Z

"[ ..............] | fetchMetadata: sill mapToRegistry uri https://registry.n.." - I hope this works for me..

chikehenderson · 2016-11-21T21:07:05Z

well something worked... :/

davidobi023 · 2017-08-01T18:55:08Z

0 info it worked if it ends with ok
1 verbose cli [ 'C:\Program Files\nodejs\node.exe',
1 verbose cli 'C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js',
1 verbose cli 'run',
1 verbose cli 'build' ]
2 info using npm@3.10.10
3 info using node@v6.11.0
4 verbose stack Error: Failed to parse json
4 verbose stack Unexpected token 'b' at 8:6
4 verbose stack "build": "electron-packager . mysample"
4 verbose stack ^
4 verbose stack at parseError (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:390:11)
4 verbose stack at parseJson (C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:79:23)
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\node_modules\read-package-json\read-json.js:48:5
4 verbose stack at C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-fs\graceful-fs.js:78:16
4 verbose stack at tryToString (fs.js:456:3)
4 verbose stack at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:443:12)
5 verbose cwd C:\Users\David\Desktop\tut\mysample
6 error Windows_NT 10.0.10586
7 error argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "run" "build"
8 error node v6.11.0
9 error npm v3.10.10
10 error file C:\Users\David\Desktop\tut\mysample\package.json
11 error code EJSONPARSE
12 error Failed to parse json
12 error Unexpected token 'b' at 8:6
12 error "build": "electron-packager . mysample"
12 error ^
13 error File: C:\Users\David\Desktop\tut\mysample\package.json
14 error Failed to parse package.json data.
14 error package.json must be actual JSON, not just JavaScript.
14 error
14 error This is not a bug in npm.
14 error Tell the package author to fix their package.json file. JSON.parse
15 verbose exit [ 1, true ]

davidobi023 · 2017-08-01T18:57:06Z

Urgent help please, tried the "npm cache clean" command..trying to build a sample project using electron.. Also my package.json content is contained below

davidobi023 · 2017-08-01T18:57:20Z

{
"name": "tut",
"version": "0.1.0",
"description": "A sample training on using node js ",
"main": "main.js",
"scripts": {
"start": "electron index.js"
"package": "",
"build": "electron-packager . mysample"
},
"author": "namegoeshere xyz@gmail.com",
"license": "MIT",
"devDependencies": {
"asar": "^0.13.0",
"electron-packager": "^8.7.2"
}
}

jimmyolo · 2017-08-01T23:03:40Z

missing a comma ,
At line 7

davidobi023 · 2017-08-02T01:02:21Z

Hi victor. issue resolved already. many thanks

chikehenderson · 2017-08-02T01:45:29Z

Did you npm install..

…

On Tue, Aug 1, 2017 at 6:57 PM, davidobi023 ***@***.***> wrote: Urgent help please, tried the "npm cache clean" command..trying to build a sample project using electron.. Also my package.json content is contained below — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#2930 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGDyiEc-0kh_Z4_NUEHp9bAiDEA6zfULks5sT3UkgaJpZM4HpM-n> .

wilsonj19 · 2017-10-19T18:25:20Z

npm cache clean
excellent tnks so much

chikehenderson · 2017-10-19T18:50:30Z

no problems.. ;) Kind Regards, *C <https://www.google.co.uk/search?q=Metaphysicist&spell=1&sa=X&ved=0ahUKEwjf8vvvkvPWAhXBcBoKHb1nDAIQvwUIJSgA>hike Henderson,Meta-physicist,Computer Scientist,* *Information Technology Solutions Expert* Email: chike.henderson@gmail.com Website: http://www.sprintandcrash.com

…

On Thu, Oct 19, 2017 at 6:25 PM, wilsonj19 ***@***.***> wrote: npm cache clean excellent tnks so much — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#2930 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGDyiCXf-Nzt8FjrloHR4t4UevIpj6FKks5st5Q2gaJpZM4HpM-n> .

imfeng · 2017-12-16T12:38:28Z

I just minify "package.json" and it worked !

mahsabehbahani · 2018-02-05T20:14:45Z

when i want to run my react app with these commands:
npm run build
npm run start

i get these errors:
npm ERR! code EJSONPARSE
npm ERR! failed to parse json
npm ERR! unexpected token b in JSON at position 117 while parsing near '...
"scripts": <
build: "webpack ",
...'
npm ERR! failed to parse package.json data.
npm ERR! package.json must be actual JSON, not just JavaScript.
npm ERR! tell the package author to fix their package.json file. JSON.parse

my package.json code is:

{
"name": "reactjs",
"version": "1.0.0",
"description": "",
"main": "index.js",

"scripts": {
build: "webpack",
start: "webpack-dev-server"
}

"author": "",
"license": "ISC",

"dependencies": {
"react": "^16.2.0",
"react-dom": "^16.2.0"
},

"devDependencies": {

"babel-core": "^6.26.0",

"babel-loader": "^7.1.2",

"babel-preset-react": "^6.24.1",

"html-webpack-plugin": "^2.30.1",

"webpack": "^3.10.0",

"webpack-dev-server": "^2.11.1"

}

npm cache clear dosn't affect

wesleytodd · 2018-02-05T20:32:49Z

@mahsabehbahani You are missing quotes around your scripts. It is json not javascript, it requires the "".

mahsabehbahani · 2018-02-05T20:40:26Z

@wesleytodd thanks for quick answer,
i fixed this but i get error yet with this change:

npm ERR! unexpected string in JSON at position 174 while parsing '{
"name": "reactjs",
"version": "1'

wesleytodd · 2018-02-05T21:05:57Z

No worries :) I was talking about this section:

"scripts": {
build: "webpack",
start: "webpack-dev-server"
}

It should read:

"scripts": {
"build": "webpack",
"start": "webpack-dev-server"
}

But your new error seems different. It would be helpful if you posted the exact and full output from your terminal using a code block formatting with three back tick characters (`). You can check the comment with the "preview" tab in github to make sure it looks like you see it in the terminal.

mahsabehbahani · 2018-02-06T18:37:34Z

@wesleytodd
This is exact output:

npm ERR! file E:\reactJS\package.json
npm ERR! code EJSONPARSE
npm ERR! Failed to parse json
npm ERR! Unexpected string in JSON at position 174 while parsing '{
npm ERR!
npm ERR! "name": "reactjs",
npm ERR!
npm ERR! "version": "1'
npm ERR! File: E:\reactJS\package.json
npm ERR! Failed to parse package.json data.
npm ERR! package.json must be actual JSON, not just JavaScript.
npm ERR!
npm ERR! Tell the package author to fix their package.json file. JSON.parse

wesleytodd · 2018-02-06T19:06:34Z

Yep, as the error message says, you have invalid json in that file. I am sorry but this is not the right place to be doing support like this. Can you please post this on stackoverflow or in the express gitter instead of continuing the conversation here?

https://gitter.im/expressjs/express

mahsa-pb · 2018-02-06T19:28:32Z

@wesleytodd
yes , i post this in the express gitter

AdiBev · 2018-03-21T23:21:36Z

Hi guys, I am having the same problem as mahsa-pb. I have validated my json file and it is fine so no idea what is wrong with my json file. Please help me thank you.

     {
  "name": "React-2",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "npm run build",
   "build": "webpack -d && webpack-dev-server --content-base src/ --inline --hot --port 1234"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "react": "^16.2.0",
    "react-dom": "^16.2.0"
  },
  "devDependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.4",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "webpack": "^3.11.0",
    "webpack-dev-server": "^3.1.1"
  }
}

dougwilson · 2018-03-21T23:26:16Z

Hi @AdiBev paste your JSON into a validator site like https://jsonformatter.curiousconcept.com/ 👍

For support and discussion, please come over to https://gitter.im/expressjs/express and we can let this 2 year old issue rest :)

KenKennef changed the title ~~Get this when trying npm install express~~ npm ERR! Failed to parse package.json data. Mar 4, 2016

KenKennef closed this as completed Mar 4, 2016

dougwilson added the question label Mar 4, 2016

expressjs locked as resolved and limited conversation to collaborators Mar 21, 2018

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npm ERR! Failed to parse package.json data. #2930

npm ERR! Failed to parse package.json data. #2930

KenKennef commented Mar 4, 2016

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dougwilson commented Mar 21, 2018

npm ERR! Failed to parse package.json data. #2930

npm ERR! Failed to parse package.json data. #2930

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KenKennef commented Mar 4, 2016

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