Introduction to GraphQL — Variables and Complex Operations

John Au-Yeung
Level Up Coding
Published in
4 min readMar 21, 2020

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Photo by Eric Prouzet on Unsplash

GraphQL is a query language for our API and a server-side runtime for running queries by using a type system for our data.

In this article, we’ll look at more complex GraphQL operations, including passing in variables, directives, mutations, and more.

Variables

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