nodemon: The token '||' is not a valid statement separator in this version.

Hi all, I managed to fix it sort of, run the following commands in order,

npm config set script-shell cmd

npm i nodemon

npm config set script-shell powershell

and for anyone trying to replicate the problem, run, npm config set script-shell powershell before npm i nodemon hope it help!

I have been having this issue as well. I’m ussing powershell 6 (also tried with powershell 5.1 and got the same result).

As OP mentions, this is what I’ve done:

`
npm init
`
Everything goes all right. Then I execute:
`
npm install nodemon --save-dev
`
And the output I get is this:
`
> node bin/postinstall || exit 0

At line:1 char:22
+ node bin/postinstall || exit 0
+                      ~~
The token '||' is not a valid statement separator in this version.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : InvalidEndOfLine
 
npm WARN index.js@1.0.0 No description
npm WARN index.js@1.0.0 No repository field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.1.2 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! nodemon@2.0.2 postinstall: `node bin/postinstall || exit 0`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the nodemon@2.0.2 postinstall 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\Javi\AppData\Roaming\npm-cache\_logs\2020-02-09T13_01_40_897Z-debug.log

I have previously used nodemon (a month ago probably) in another project through this exact same install command and everything worked fine. Now, in that project, deleting the node_modules folder and running npm install yields the same output as above. It seems there’s something wrong with the command node bin/postinstall || exit 0 ‘||’ is not a powershell operator.

I’m glad to give any more details if needed.