- mime-types
The ultimate javascript content-type utility.
- fs-extra
fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as mkdir -p, cp -r, and rm -rf.
- mocha
simple, flexible, fun test framework
- semver
The semantic version parser used by npm.
- ms
Tiny millisecond conversion utility
- ws
Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js
- debug
small debugging utility
- qs
A querystring parser that supports nesting and arrays, with a depth limit
- node-fetch
A light-weight module that brings window.fetch to node.js
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