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Added resolver-returned value to the error object, plus further docum…
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…entation on expected error fields (graphql#590)
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machineghost committed Jun 1, 2020
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Expand Up @@ -118,6 +118,12 @@ The `graphqlHTTP` function accepts the following options:
errors produced by fulfilling a GraphQL operation. If no function is
provided, GraphQL's default spec-compliant [`formatError`][] function will be used.

Although the fields on the error provided to this function may vary (based on the error type), they will typically include:
* **message:** the error message
* **locations:** the location(s) in the Javascript code where the error ocurred
* **path:** the path within the returned results where the error occurred (eg. in a schema violation error, the path to the part of the results that violated the schema)
* **result:** the value which was returned by the resolver (if any)

- **`customParseFn`**: An optional function which will be used to create a document
instead of the default `parse` from `graphql-js`.

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