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Issue Description

The explicit-function-return-type rule has the allowTypedFunctionExpressions option. This option is enabled as part of the default option set for the rule.

This option is meant to allow omitting a return type when it will be enforced during assignment against a LHS type assertion, similar to how omitted argument types will be handled by TypeScript itself. This option should take into account assignment to JSX attributes but does not. Such assignment will be fully enforced by TypeScript JSX handling and is semantically the same as the object-attribute-assignment logic that is also allowed under this option.

As seen in this screenshot from the linked repo, examples 2 and 3 are functionally the same but treated differently by the rule. Example 3 should not be a lint error.

Demo PR with a potential version of this change.

Reproduction Repository Link

https://github.com/merrywhether/return-type

Repro Steps

1. clone the repo
2. pnpm install
3. pnpm lint

(other package managers will work as well)

% pn lint

> return-type@0.1.0 lint .../return-type
> next lint


./src/pages/index.tsx
15:5  Error: Missing return type on function.  @typescript-eslint/explicit-function-return-type
33:22  Error: Missing return type on function.  @typescript-eslint/explicit-function-return-type

(only the first error should be valid)

Versions