What is Install Node.js Application Dependencies?

Since the applications are written with Hyperledger Fabric Node.js SDK Isabella needs to install some dependencies, which are listed in the package.json file.

(isabella)$ cd ~/hyperledger-binaries/fabric-samples
(isabella)$ cd commercial-paper/organization/magnetocorp/application

(isabella)$ npm install
...
added 320 packages from 230 contributors in 140.614s
npm ERR! Callback called more than once.

(isabella)$ ls -l node_modules/ | more
drwxrwxr-x  4 fyicenter  4096 Apr 21 17:03 @babel
drwxrwxr-x  5 fyicenter  4096 Apr 21 17:03 @types
drwxrwxr-x  4 fyicenter  4096 Apr 21 17:03 acorn
drwxrwxr-x  2 fyicenter  4096 Apr 21 17:03 acorn-jsx
drwxrwxr-x  5 fyicenter  4096 Apr 21 17:03 ajv
drwxrwxr-x  2 fyicenter  4096 Apr 21 17:03 ansi-escapes
...

If you see access error, and "node_modules" sub-directory is not created, you can have a npm versioning problem. Try to use the following command to fix it.

(isabella)$ nvm use --delete-prefix v11.14.0

(isabella)$ node -v
v11.14.0

(isabella)$ npm -v
6.7.0

⇒ Prepare User Identity for Isabella

⇐ Client Application Gateway

⇑ commercial-paper Sample Network

⇑⇑ Hyperledger Tutorials