Add Require Additional JS Libraries In Postman as a mac til

mac/require-additional-js-libraries-in-postman.md

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+# Require Additional JS Libraries In Postman
+
+When writing pre-request scripts and test scripts as part of a Postman
+request, you aren't limited to vanilla JavaScript. There are a handful of
+libraries that can be required where needed.
+
+This short list of available libraries includes `cherrio`, `lodash`, and
+`moment`.
+
+To pull one of these into a particular script, use the standard `require`
+feature:
+
+```javascript
+var moment = require('moment');
+
+var now = moment();
+```
+
+For a full list of what is available, check out [Postman's Sandbox API
+Reference](https://www.getpostman.com/docs/postman/scripts/postman_sandbox_api_reference).