@graphql-eslint/eslint-plugin/docs/rules/possible-fragment-spread.md

GraphQL plugin for ESLint

# `possible-fragment-spread`

✅ The `"extends": "plugin:@graphql-eslint/operations-recommended"` property in a configuration file
enables this rule.

- Category: `Operations`
- Rule name: `@graphql-eslint/possible-fragment-spread`
- Requires GraphQL Schema: `true` [ℹ️](../../README.md#extended-linting-rules-with-graphql-schema)
- Requires GraphQL Operations: `false`
  [ℹ️](../../README.md#extended-linting-rules-with-siblings-operations)

A fragment spread is only valid if the type condition could ever possibly be true: if there is a
non-empty intersection of the possible parent types, and possible types which pass the type
condition.

> This rule is a wrapper around a `graphql-js` validation function.

## Resources

- [Rule source](https://github.com/graphql/graphql-js/blob/main/src/validation/rules/PossibleFragmentSpreadsRule.ts)
- [Test source](https://github.com/graphql/graphql-js/tree/main/src/validation/__tests__/PossibleFragmentSpreadsRule-test.ts)