ServiceNow Scripted REST APIs: Part 11 - HTTP methods versus Javascript methods

While API communication uses HTTP methods for client-server communication, we use ServiceNow Javascript methods (from GlideRecord) to perform database operations. What is the relationship between the two?
Further learning:
- What is API Idempotency and Why Is It Important?
• What is API Idempotenc...
- HTTP Methods
restfulapi.net...
- Why should you use standard HTTP methods while designing REST APIs?
/ why-you-should-use-the...