NPM Parallelshell not working, showing error

Question

I was trying to run npm lite server and onchange for scss together as described in my course but instead got an error... Tried Running npm start with package.json containing script as -

"scripts": {
    "start": "npm run watch:all",
    "test": "echo \"Error: no test specified\" && exit 1",
    "lite": "lite-server",
    "scss": "node-sass -o css/ css/",
    "watch:scss": "onchange \"css/*.scss\" -- npm run scss",
    "watch:all": "parallelshell \"npm run watch:scss\" \"npm run lite\""
  }

Instead of working properly, I got the following error -

> confusion@1.0.0 start F:\Courses\Full-Stack Web Development\Bootstrap4\conFusion
> npm run watch:all


> confusion@1.0.0 watch:all F:\Courses\Full-Stack Web Development\Bootstrap4\conFusion
> parallelshell "npm run watch:scss" "npm run lite"

child_process.js:430
    throw new ERR_INVALID_ARG_TYPE('options.cwd', 'string', options.cwd);
    ^

TypeError [ERR_INVALID_ARG_TYPE]: The "options.cwd" property must be of type string. Received function wrappedCwd
    at normalizeSpawnArguments (child_process.js:430:11)
    at spawn (child_process.js:546:13)
    at F:\Courses\Full-Stack Web Development\Bootstrap4\conFusion\node_modules\parallelshell\index.js:104:17
    at Array.forEach (<anonymous>)
    at Object.<anonymous> (F:\Courses\Full-Stack Web Development\Bootstrap4\conFusion\node_modules\parallelshell\index.js:100:6)
    at Module._compile (internal/modules/cjs/loader.js:1176:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1196:10)
    at Module.load (internal/modules/cjs/loader.js:1040:32)
    at Function.Module._load (internal/modules/cjs/loader.js:929:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12) {
  code: 'ERR_INVALID_ARG_TYPE'
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! confusion@1.0.0 watch:all: `parallelshell "npm run watch:scss" "npm run lite"`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the confusion@1.0.0 watch:all script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Ankur\AppData\Roaming\npm-cache\_logs\2020-05-27T07_16_54_990Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! confusion@1.0.0 start: `npm run watch:all`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the confusion@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Ankur\AppData\Roaming\npm-cache\_logs\2020-05-27T07_16_55_176Z-debug.log

How to remove this error..?

score 11 · Answer 1 · answered May 27 '20 at 07:43

11

While searching for a solution I found the solution for this problem on another post -

Problem running parallelshell Nodejs script

go to the file:

node_modules/parallelshell/index.js:105

Then change this line:

cwd: process.versions.node < '8.0.0' ? process.cwd : process.cwd(),

To this:

cwd: parseInt(process.versions.node) < 8 ? process.cwd : process.cwd(),

answered May 27 '20 at 07:43

Ankur

151
7

Another option is to downgrade to 3.0.1 (following the same course, don't want to switch to another library for that reason) – FFD Dec 29 '21 at 17:46

NPM Parallelshell not working, showing error

1 Answers1