Node.js - check if module is installed without actually requiring it
103118
Check if a node.js module is available
60754
Check synchronously if file/directory exists in Node.js
95422
What is the purpose of Node.js module.exports and how do you use it?
115187
How do I avoid checking for updates for a specific module?
6440
Can I see why a package is installed?
69290
How do I programmatically install and enable a module?
62390
Override a single JavaScript file from a module
154492
How does node resolve a module location when its required from another module?
25500
How can I use a new Perl module without install permissions?
6994
Detect if called through require or directly by command line
62293
How do I detect what .NET Framework versions and service packs are installed?
117360
Check if the application is already installed
6958
How can I check if a program exists from a Bash script?
81981
How to test if package is installed?
110829
The "proper" way to test if a service is running in a script
151498
How to find out if a specific package is installed on Debian?
72178
Detect version of JavaScript