GraphQL

What is GraphQL 

• API Standard invented & open-sourced by Facebook
• Alternative to  REST API 
• enables declarative data fetching 
• exposes single endpoint & responds to queries

How it works? 

Why Graphql?

• Improvises performance by reducing the data that is to be transferred over the internet
• Variety of different frontend frameworks and platforms on client-side
• Fast development speed & expectation for rapid feature development

Why Graphql is better than REST?

Flexibility & efficient 

No more over /under fetching of data

Over fetching :

Under fetching:

Insightful analytics 

Schema serves as contract between client and server

CORE CONCEPTS :

SDL :SCHEMA DEFINITION LANGUAGE

Writing Data with mutations

3 kinds of mutations

• creating new data
• updating existing data
• deleting existing data