What is resolvers?

In the context of GraphQL, resolvers are functions that provide the instructions for turning a GraphQL operation (query, mutation, or subscription) into data. They resolve the value for a field in a GraphQL type. When a GraphQL query is executed, the GraphQL server calls the appropriate resolvers to fetch the data for each field in the query. Resolvers typically interact with a database, API, or other data source to retrieve the necessary information. They are a crucial part of GraphQL as they bridge the gap between the GraphQL schema and the underlying data.