josephsavona 6e1b4fd064 [compiler] More flexible/helpful lazy ref initialization (#34449) ...

Two small QoL improvements inspired by feedback:
* `if (ref.current === undefined) { ref.current = ... }` is now allowed.
* `if (!ref.current) { ref.current = ... }` is still disallowed, but we
emit an extra hint suggesting the `if (!ref.current == null)` pattern.

I was on the fence about the latter. We got feedback asking to allow `if
(!ref.current)` but if your ref stores a boolean value then this would
allow reading the ref in render. The unary form is also less precise in
general due to sketchy truthiness conversions. I figured a hint is a
good compromise.

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* __->__ #34449
* #34424

DiffTrain build for [bd9e6e0bed](https://github.com/facebook/react/commit/bd9e6e0bed6aed479940b1cf891dde82ab224028)

2025-09-10 13:47:58 -07:00

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index.js

[compiler] More flexible/helpful lazy ref initialization (#34449)

2025-09-10 13:47:58 -07:00