$ sudo npm install antlr4
$ sudo npm install -g antlr4

If want to update the antlr4 package execute the command as below,

$ sudo npm update antlr4

Update package globally,

$ npm install -g antlr4

Git clone:

$ sudo  git clone https://github.com/rektide/antlr4.git

$ sudo  npm install -g ./antlr4

antlr4@4.7.0 /usr/lib/node_modules/antlr4

How to remove antlr4 package :

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

$ sudo npm uninstall antlr4

Basic Information of antlr4 NPM Package: