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apollo-angular-link-http-batch

v1.9.0

Published

An Apollo Link to combine multiple GraphQL operations into single HTTP request.

Downloads

4,279

Readme

HTTP Link

npm version Get on Slack

Purpose

An Apollo Link to combine multiple GraphQL operations into single HTTP request.

Installation

npm install apollo-angular-link-http-batch --save

Usage

import {
  HttpBatchLinkModule,
  HttpBatchLink,
} from 'apollo-angular-link-http-batch';

@NgModule({
  imports: [HttpBatchLinkModule],
})
class AppModule {
  constructor(httpLink: HttpBatchLink) {
    const link = httpLink.create({uri: '/graphql'});
  }
}

HttpClient

The HTTP Link relies on having HttpClient (from @angular/common/http) present in your application.

Options

Accepts the same options as apollo-angular-link-http.

BatchOptions

The batching options indicate how operations are batched together.

| name | value | default | required | | ------------- | -------- | ------- | -------- | | batchInterval | number | 10 | false | | batchMax | number | 10 | false | | batchKey | Function | - | false |

  • batchInterval - the maximum time a batch will wait before automatically being sent over the network
  • batchMax - the size of batches
  • batchKey a function that accepts an operation and returns a string key, which uniquely names the batch the operation belongs to, defaults to returning the same string.

NOTICE: batchKey by default batches together requests with the same uri and the same options. Since options from an operation's context overwrites those from a link you could end up with few differents keys and what it means, few separate requests.

Context

Works in the same way as in apollo-angular-link-http.

To skip batching you can set skipBatching: true in operation's context.

NOTICE: skipBatching works only with the default batchKey. To create custom one you should check if skipBatching is set in context and generate a random batchKey for that operation.