Locally test npm packages before publishing

Run npm pack. npm pack creates a tarball of your package that can be shared and installed. It's what is uploaded to npm when you publish a package.

~/waterthetrees/tree-id $ npm pack

Make a copy the tarball in any location. Here we move it to the root folder.

~/waterthetrees/tree-id $ cp waterthetrees-tree-id-1.x.x.tgz ~

Install the tarball in the project that uses the package. Or create a temporary project to test the package.

~/waterthetrees/wtt-server $ npm install ~/waterthetrees-tree-id-1.x.x.tgz

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Reference: https://blog.vcarl.com/testing-packages-before-publishing/#npm-pack