Client side?

[CTimmerman]

Some like https://serverlesslibrary.net/sample/a9f4819a-5aeb-4beb-a81e-d6fd88d3d25d claim this is safe for client side: """NOT ACTIVE
No longer maintaining this as you can do this client side with the Javascript API! My reccomendation is to use that :)

CRUD for CosmosDB on Azure Functions (serverless)"""

However, i only see some low level server side functions here, and no client side example. Was that author wrong, or can we allow/block data access with rate limiting and public tokens?