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MediaReplaceFlow: Avoid React warning when selecting media #34618

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@Mamaduka Mamaduka commented Sep 7, 2021

Description

The component was calling setMediaURLValue after calling the onSelect callback, which in some cases can unmount the component.

Initially reported in #34506

How has this been tested?

  • Add "Post Featured Image" block
  • Select image
  • Click on "Replace" and select another image

DevTools console shouldn't display a "Can't perform a React state update on an unmounted component" warning.

Types of changes

Bugfix

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).
@Mamaduka Mamaduka requested a review from ellatrix as a code owner Sep 7, 2021
@Mamaduka Mamaduka requested a review from Soean Sep 7, 2021
@Mamaduka Mamaduka self-assigned this Sep 7, 2021
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Size Change: -2 B (0%)

Total Size: 1.04 MB

Filename Size Change
build/block-editor/index.min.js 119 kB -2 B (0%)
ℹ️ View Unchanged
Filename Size
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compressed-size-action

setMediaURLValue( media.url );
onSelect( media );

This comment has been minimized.

@ellatrix

ellatrix Sep 7, 2021
Member

Could you leave an inline comment? In what case does it unmount the component?

This comment has been minimized.

@Mamaduka

Mamaduka Sep 7, 2021
Author Member

I think that depends on the parent component and what it does inside the onSelect callback.

The "Post Featured Image" edit component will re-render it when new media data is fetched:

{ !! media && ! isDescendentOfQueryLoop && (
<BlockControls group="other">
<MediaReplaceFlow
mediaId={ featuredImage }
mediaURL={ media.source_url }
allowedTypes={ ALLOWED_MEDIA_TYPES }
accept="image/*"
onSelect={ onSelectImage }
onError={ onUploadError }
/>
</BlockControls>
) }

This comment has been minimized.

@Mamaduka

Mamaduka Sep 8, 2021
Author Member

@ellatrix, the cause of the unmounting can be different in each case, and I don't think the inline comment would be enough to provide the necessary information.

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