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Staleness tracking for normalized GraphQL responses





npm version travis build Coverage Status code style: prettier MIT license

Staleness tracking for normalized GraphQL responses

How to install

npm install graphql-norm-stale --save


When caching several normalized graphql responses it is sometimes helpful to mark some entries in the cache as stale. This package helps with tracking of stale entries.

Example usage

import { normalize, denormalize, merge } from "graphql-norm";
import { request } from "graphql-request";

// A plain JS object to hold the normalized responses
let cache = {};

const query = gql`
  query TestQuery {
    posts {
      author {
      comments {
        commenter {

// Make a request to fetch the data
const response = request(query);

// Normalize the response
const normalizedResponse = normalize(query, {}, response);

// Merge the normalized response into the cache
cache = merge(cache, normalizedResponse);

// Later when we want to read a query from the cache
const cachedResponse = denormalize(query, {}, cache);



The isStale() function takes a map of stale fields and a map of fields and checks if the fields are among the stale entries. The stale field map contains another map of fields for each key. This secondary map can only have entries with value true. The reason a map is used instead of an array is to have faster checking of membership of fields.

isStale(staleMap: FieldsMap, fields: FieldsMap): boolean


The clearStale() function takes a map of normalized GraphQL objects and a map of stale fields. It removes any fields in the staleness map that are present in the normalized map.

clearStale(normMap: NormMap, staleMap: FieldsMap): FieldsMap


Creates a patch for invalidation of an entity.


Creates a patch for invalidation of an entity's field.


Returns a new map of stale fields with the patches applied. It needs the normMap in order to do recursive patches.

applyPatches(normMap: NormMap, staleMap: FieldsMap): FieldsMap

Related packages

How to develop

Node version >=12.6.0 is needed for development.

To execute the tests run yarn test.

How to publish

yarn version --patch
yarn version --minor
yarn version --major