Fix pop-value being sent for undefined values.

[leonaves]

Because of this array access:

react-select/packages/react-select/src/Select.tsx

Line 1091 in 884f1c4

const lastSelectedValue = selectValue[selectValue.length - 1];

removedValue could technically be undefined. This happens when the select box is empty and a user hits backspace. It can cause runtime errors in the consuming libraries if the options are objects rather than primitives. This stops those actions being sent.

(The other option would be to update the typing in the below part of the code to mark removedValue as optional, forcing consumers to protect against potential undefined values, but I believe this makes more sense, as we are not removing anything if the set of values is already empty, so sending a pop-value action doesn't really make sense):

react-select/packages/react-select/src/types.ts

Lines 138 to 142 in edf5265

	export interface PopValueActionMeta<Option> extends ActionMetaBase<Option> {
	action: 'pop-value';
	removedValue: Option;
	name?: string;
	}

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🦋 Changeset detected

Latest commit: 5c9fe3e

The changes in this PR will be included in the next version bump.

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Name	Type
react-select	Patch

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[leonaves]

@lukebennett88 @emmatown @Methuselah96 I know this library isn't super actively maintained at the moment, but this is a tiny change with test coverage so I'd love a real quick look and a patch release! Would be really appreciated! 🙏

[Methuselah96]

Hmm, this could technically be considered a breaking change, but this is probably our best option. I'll approve and merge if no one objects in the next 24 hours.

[leonaves]

@Methuselah96 Yeah I considered that, but as the exact shape of these events isn't actually documented anywhere (as far as I can see) other than the exported types, and the exported types actually declare that removedValue will never be undefined, I'd say it's fine to call it a patch.

[Methuselah96]

Unfortunately react-select is popular enough that Hyrum's Law is in full effect. If it turns out people were depending on this, and there's on other sufficient solution, I'd be quick to revert it.

[leonaves]

I'll approve and merge if no one objects in the next 24 hours.

👀 😄