Default Media widget has an option to sort media items after upload items. I see the same JS code to do that, but I didn't understand how to work to enable this option.
Create a custom form with a media_library element multivalue.
$form['image'] = [
'#type' => 'media_library',
'#allowed_bundles' => ['image'],
'#title' => t('Upload your image'),
'#default_value' => $image_default_value,
'#description' => t('Upload or select your profile image.'),
'#cardinality' => 4,
];The media field has weight input and the drag-and-drop works. But when I save the content, the sort value doesn't apply.
Needs review
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I've tested both patch #4 and patch #8. Both worked to re-order the images and save in the correct order, however patch #8 worked better for me as it continued to show a preview of the image (pre-save) whereas #4 required a save before I could see a preview.