Summary:
This exposes iOS's spellCheckingType functionality to JavaScript. The native functionality is a three state enum. It gets exposed to JavaScript as a boolean. The initial value and JS null map to the third state.
An alternative design for this API would have been to expose a three state enum to JavaScript:
- "on" which maps to UITextSpellCheckingTypeYes
- "off" which maps to UITextSpellCheckingTypeNo
- "auto" (default) which maps to UITextSpellCheckingTypeDefault
For consistency, I decided to use the same API design as spellCheck. We don't have many options for fixing spellCheck in #11055 without introducing a breaking change.
**Test plan (required)**
Verified that switching `spellCheck` between `true`, `false`, and `null` all work correctly in single line and multiline `TextInputs`.
Closes https://github.com/facebook/react-native/pull/11056
Differential Revision: D4232802
Pulled By: javache
fbshipit-source-id: 79e03307fa6a30a169f7e2fd0ec5ac826663e7c1
0e55f5b26d