$ sudo npm install weakmap
$ sudo npm install -g weakmap

If want to update the weakmap package execute the command as below,

$ sudo npm update weakmap

Update package globally,

$ npm install -g weakmap

Git clone:

$ sudo  git clone https://github.com/rektide/weakmap.git

$ sudo  npm install -g ./weakmap

weakmap@0.0.6 /usr/lib/node_modules/weakmap

How to remove weakmap package :

You can uninstall or remove this package from your node_modules run the command as below,

$ sudo npm uninstall weakmap

Basic Information of weakmap NPM Package: