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graphql-api-koa

GraphQL execution and error handling middleware written from scratch for Koa.

Installation

To install graphql-api-koa and its graphql peer dependency with npm, run:

npm install graphql-api-koa graphql

Setup the Koa middleware in this order:

1. errorHandler, to catch errors from following middleware for a correctly formatted GraphQL response.
2. A GraphQL multipart request processor like graphqlUploadKoa from graphql-upload, to support file uploads (optional).
3. A request body parser like koa-bodyparser.
4. execute, to execute GraphQL.

See the execute middleware examples to get started.

Requirements

Supported runtime environments:

• Node.js versions ^14.17.0 || ^16.0.0 || >= 18.0.0.

Projects must configure TypeScript to use types from the ECMAScript modules that have a // @ts-check comment:

• compilerOptions.allowJs should be true.
• compilerOptions.maxNodeModuleJsDepth should be reasonably large, e.g. 10.
• compilerOptions.module should be "node16" or "nodenext".

Exports

The npm package graphql-api-koa features optimal JavaScript module design. It doesn’t have a main index module, so use deep imports from the ECMAScript modules that are exported via the package.json field exports:

• errorHandler.mjs
• execute.mjs
• GraphQLAggregateError.mjs