Menu
On windows for some reason when I run npm install it won't install devDependencies. AFAIK it should. If I run npm install --dev devDependencies are installed. I don't understand why npm install doesn't install devDependencies too, but installs only dependencies. What could be the reason? How can I fix it?
Maybe something is wrong with my package.json? It is listed below if it may be helpful:
{ "name": "try-brunch", "version": "0.1.0", "private": "true", "devDependencies": { "brunch": "^2.0.4", "cssnano-brunch": "^1.1.5", "javascript-brunch": "^1.8.0", "sass-brunch": "^1.9.2", "uglify-js-brunch": "^1.7.8" }, "dependencies": { "jquery": "^2.1.4" } } 
781
By default, npm install will install all modules listed as dependencies in package. json . With the --production flag (or when the NODE_ENV environment variable is set to production ), npm will not install modules listed in devDependencies .
On Windows, the cause of this error could be that a PATH or system variable is not correctly set. The error can also occur if you do not have npm or Node. js installed, have an outdated version, or have permission issues.
A: Both dependencies and devDependencies are installed to the local node_modules folder on a yarn install or npm install , but only dependencies - and not devDependencies - are installed to the local node_modules folder when doing a yarn install --production and npm install --production .
It should be the default! devDependencies are literally dependencies for the developers of the module. I bet most of us npm install a module to use it, rather than develop it. Say you write an app, and you need a logger or webpack plugin. those are devdeps.
You can use the short way for installation dependencies only for development as follows: Show activity on this post. I had a similar problem. npm install --only=dev didn't work, and neither did npm rebuild. Ultimately, I had to delete node_modules and package-lock.json and run npm install again. That fixed it for me. Show activity on this post.
npm gets its config settings from the command line, environment variables, and npmrc files. So check environment variables, and the npmrc file. Still failing? Ok, create a new folder, ideally somewhere else on your filesystem. ie. not in same folder hierarchy.
Check the NPM docs for install
With the
--productionflag (or when the NODE_ENV environment variable is set to production), npm will not install modules listed in devDependencies."The
--only={prod[uction]|dev[elopment]}argument will cause either only devDependencies or only non-devDependencies to be installed regardless of the NODE_ENV."
Have you tried
npm install --only=dev If you are worried that your package.json might be incorrect, best thing to do is this. Create a new folder, and run:
npm init --yes Then:
npm install --save-dev brunch@^2.0.4 npm install --save-dev cssnano-brunch@^1.1.5 npm install --save-dev javascript-brunch@^1.8.0 npm install --save-dev sass-brunch@^1.9.2 npm install --save-dev uglify-js-brunch@^1.7.8 npm install jquery@^2.1.4 --save And you should be good to go! Otherwise, will keep posting other options.
Check your npm configuration:
npm config list npm gets its config settings from the command line, environment variables, and npmrc files. So check environment variables, and the npmrc file.
Still failing?
Ok, create a new folder, ideally somewhere else on your filesystem. ie. not in same folder hierarchy. For instance, C:\myNewFolder - the closer to the base C: drive the better.
Then run:
npm init --yes Now run:
npm install underscore --save and finally:
npm install mocha --save-dev Does everything work as expected?
What I am trying to do is understand whether your problem is global, or something local to the previous folder and dependencies.
92
Check if npm config production value is set to true. If this value is true, it will skip over the dev dependencies.
Run npm config get production
To set it: npm config set -g production false
34
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
