@shopify/graphql-client/src/graphql-client/constants.ts

Shopify GraphQL Client - A lightweight generic GraphQL JS client to interact with Shopify GraphQL APIs

export const CLIENT = 'GraphQL Client';
export const MIN_RETRIES = 0;
export const MAX_RETRIES = 3;

export const GQL_API_ERROR =
  "An error occurred while fetching from the API. Review 'graphQLErrors' for details.";
export const UNEXPECTED_CONTENT_TYPE_ERROR =
  'Response returned unexpected Content-Type:';
export const NO_DATA_OR_ERRORS_ERROR =
  'An unknown error has occurred. The API did not return a data object or any errors in its response.';

export const CONTENT_TYPES = {
  json: 'application/json',
  multipart: 'multipart/mixed',
};
export const SDK_VARIANT_HEADER = 'X-SDK-Variant';
export const SDK_VERSION_HEADER = 'X-SDK-Version';

export const DEFAULT_SDK_VARIANT = 'shopify-graphql-client';
// This is value is replaced with package.json version during rollup build process
export const DEFAULT_CLIENT_VERSION = 'ROLLUP_REPLACE_CLIENT_VERSION';

export const RETRY_WAIT_TIME = 1000;
export const RETRIABLE_STATUS_CODES = [429, 503];
export const DEFER_OPERATION_REGEX = /@(defer)\b/i;
export const NEWLINE_SEPARATOR = '\r\n';
export const BOUNDARY_HEADER_REGEX = /boundary="?([^=";]+)"?/i;
export const HEADER_SEPARATOR = NEWLINE_SEPARATOR + NEWLINE_SEPARATOR;