Reference

https://graphql.org/learn/

https://github.com/graphql/graphql-js

When is it good time to use Graphql?

• need to fetch multiple data at once
• need to fetch specific field of data only

Why not Rest Api or Grpc?

• Because Graphql provides...

  • reduce payload size
    • field seleciton
  • easy to making code
    • multiple resources at once
    • simple endpoint
  • easy communication b/w front-end developers and back-end developers.

• But it's not a big deal that...

  • multiple http reqeust => can be solved by http/2 or websocket.

Graphql is not silver bullet. It's just Query Language.