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https://github.com/n1ru4l/envelop
Envelop is a lightweight library allowing developers to easily develop, share, collaborate and extend their GraphQL execution layer. Envelop is the missing GraphQL plugin system.
https://github.com/n1ru4l/envelop
api execution-pipeline graphql graphql-execution graphql-schema javascript nodejs plugins the-guild typescript
Last synced: 12 days ago
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Envelop is a lightweight library allowing developers to easily develop, share, collaborate and extend their GraphQL execution layer. Envelop is the missing GraphQL plugin system.
- Host: GitHub
- URL: https://github.com/n1ru4l/envelop
- Owner: n1ru4l
- License: mit
- Created: 2021-02-17T09:42:09.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2024-10-29T00:07:44.000Z (15 days ago)
- Last Synced: 2024-10-29T14:52:32.801Z (14 days ago)
- Topics: api, execution-pipeline, graphql, graphql-execution, graphql-schema, javascript, nodejs, plugins, the-guild, typescript
- Language: TypeScript
- Homepage: https://envelop.dev
- Size: 17.6 MB
- Stars: 787
- Watchers: 12
- Forks: 127
- Open Issues: 139
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
[](https://graphql.org/conf/2024/?utm_source=github&utm_medium=envelop&utm_campaign=readme)
## Envelop
`envelop` is a lightweight JavaScript (/TypeScript) library for wrapping GraphQL execution layer and
flow, allowing developers to develop, share and collaborate on GraphQL-related plugins while filling
the missing pieces in GraphQL implementations.
`envelop` aims to extend the GraphQL execution flow by adding plugins that enrich the feature set of
your application.
`@envelop/core`:
[](https://www.npmjs.com/package/@envelop/core)
> Envelop is created and maintained by [The Guild](https://the-guild.dev/), and used in production
> by our clients.
### [Envelop Key Concepts](<(https://www.envelop.dev/docs#key-concepts)>)
- Lightweight
- Wraps the entire GraphQL pipeline, based on plugins
- Low-level API for extending the execution layer
- Agnostic to GraphQL Engine
- Agnostic to the HTTP layer
- Agnostic to the schema tools
- Plugins-based usage
- No vendor lock-in
- Amazing TypeScript support
[You can read more about the key concepts or Envelop here](https://www.envelop.dev/docs#key-concepts)
## [Getting Started](https://www.envelop.dev/docs/getting-started)
Start by adding the core of Envelop to your codebase:
```
yarn add graphql @envelop/core
```
Then, create a simple Envelop based on your GraphQL schema:
```ts
import * as GraphQLJS from 'graphql'
import { envelop, useEngine, useSchema } from '@envelop/core'
const mySchema = buildSchema(/* ... */) // GraphQLSchema
const getEnveloped = envelop({
plugins: [useEngine(GraphQLJS), useSchema(mySchema)]
})
```
The result of `envelop` is a function that allows you to get everything you need for the GraphQL
execution: `parse`, `validate`, `contextBuilder` and `execute`. Use that to run the client's GraphQL
queries. Here's a pseudo-code example of how it should look like:
```ts
const httpServer = createServer()
httpServer.on('request', async (req, res) => {
// Here you get the alternative methods that are bundled with your plugins
// You can also pass the "req" to make it available for your plugins or GraphQL context.
const { parse, validate, contextFactory, execute, schema } = getEnveloped({ req })
// Parse the initial request and validate it
const { query, variables } = JSON.parse(req.payload)
const document = parse(query)
const validationErrors = validate(schema, document)
if (validationErrors.length > 0) {
return res.end(JSON.stringify({ errors: validationErrors }))
}
// Build the context and execute
const context = await contextFactory(req)
const result = await execute({
document,
schema,
variableValues: variables,
contextValue: context
})
// Send the response
res.end(JSON.stringify(result))
})
httpServer.listen(3000)
```
Behind the scenes, this simple workflow allows you to use **Envelop plugins** and hook into the
entire request handling flow.
Here's a simple example for collecting metrics and logging all incoming requests, using the built-in
plugins:
```ts
const getEnveloped = envelop({
plugins: [useEngine(GraphQLJS), useSchema(schema), useLogger(), useTiming()]
})
```
> [You can read more about here](https://www.envelop.dev/docs/getting-started)
## [Integrations / Examples](https://www.envelop.dev/docs/integrations)
[You can find the integrations and compatibility list, and code-based examples here](https://www.envelop.dev/docs/integrations)
## Available Plugins
You can explore all plugins in our [Plugins Hub](https://www.envelop.dev/plugins). If you wish your
plugin to be listed here and under PluginsHub, feel free to add your plugin information
[in this file](https://github.com/n1ru4l/envelop/edit/main/website/src/lib/plugins.ts#L23) and
create a Pull Request!
We provide a few built-in plugins within the `@envelop/core`, and many more plugins as standalone
packages.
**[Envelop's Plugin Hub](https://www.envelop.dev/plugins)**
## Sharing / Composing `envelop`s
After an `envelop` has been created, you can share it with others as a complete layer of plugins.
This is useful if you wish to create a predefined layer of plugins, and share it with others. You
can use it as a shell and as a base for writing shareable pieces of servers.
You can read more about
[Sharing and Composing Envelops here](https://www.envelop.dev/docs/composing-envelop).
## Write your own plugin!
Envelop plugins are just objects with functions, that provide contextual implementation for
before/after each phase, with a flexible API.
Here's a simple example that allows you to print the execution params:
```ts
const myPlugin = {
onExecute({ args }) {
console.log('Execution started!', { args })
return {
onExecuteDone({ result }) {
console.log('Execution done!', { result })
}
}
}
}
const getEnveloped = envelop({
plugins: [
/// ... other plugins ...,
myPlugin
]
})
```
[For a complete guide and API docs for custom plugins, please refer to Envelop website](https://www.envelop.dev/docs/plugins)
### Contributing
If this is your first time contributing to this project, please do read our
[Contributor Workflow Guide](https://github.com/the-guild-org/Stack/blob/master/CONTRIBUTING.md)
before you get started off.
Feel free to open issues and pull requests. We always welcome support from the community.
### Code of Conduct
Help us keep Envelop open and inclusive. Please read and follow our
[Code of Conduct](https://github.com/the-guild-org/Stack/blob/master/CODE_OF_CONDUCT.md) as adopted
from [Contributor Covenant](https://www.contributor-covenant.org/)
### License
[](https://raw.githubusercontent.com/apollostack/apollo-ios/master/LICENSE)
MIT