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Create basic documentation for IntersectionObserver #50528

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Summary:
Changelog: [internal]

This adds basic documentation for the IntersectionObserver Web API implementation in React Native.

Differential Revision: D72573107

@facebook-github-bot facebook-github-bot added CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. p: Facebook Partner: Facebook Partner labels Apr 7, 2025
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This pull request was exported from Phabricator. Differential Revision: D72573107


The global `IntersectionObserver` class is defined in JavaScript and it does its setup using a native module.

In native, it uses mount hooks from `UIManager` to run intersection calculations and update the state of the observers. When there a mount operation is reported from the host platform to `UIManager`, `UIManager` notifies the mount hook that triggers a check on the observers that are observing intersections on that surface. If the intersection triggers a state change, the notification is dispatched to the JavaScript observers.
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In native, it uses mount hooks from `UIManager` to run intersection calculations and update the state of the observers. When there a mount operation is reported from the host platform to `UIManager`, `UIManager` notifies the mount hook that triggers a check on the observers that are observing intersections on that surface. If the intersection triggers a state change, the notification is dispatched to the JavaScript observers.
In native, it uses mount hooks from `UIManager` to run intersection calculations and update the state of the observers. When a mount operation is reported from the host platform to `UIManager`, `UIManager` notifies the mount hook that triggers a check on the observers that are observing intersections on that surface. If the intersection triggers a state change, the notification is dispatched to the JavaScript observers.

rubennorte and others added 3 commits April 8, 2025 01:47
Differential Revision: D72562795
Differential Revision: D72573497
Summary:
Pull Request resolved: facebook#50528

Changelog: [internal]

This adds basic documentation for the IntersectionObserver Web API implementation in React Native.

Reviewed By: lenaic

Differential Revision: D72573107
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This pull request was exported from Phabricator. Differential Revision: D72573107

@facebook-github-bot facebook-github-bot added the Merged This PR has been merged. label Apr 8, 2025
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This pull request has been merged in 03e0dfa.

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3 participants