Localize media-popup.js?

[bradyvercher]

Some plugins that enqueue media-upload.js in the dashboard are throwing a javascript error in the beta: ReferenceError: _wpMediaViewsL10n is not defined.

This can be reproduced by implementing the following code and visiting any dashboard page that doesn't include the media upload functionality by default:

add_action( 'admin_enqueue_scripts', 'media_upload_js_test' );
function media_upload_js_test() {
	wp_enqueue_script( 'media-upload' );
}

Also reported in the forum: ​http://wordpress.org/support/topic/35-beta-3-load-scripts-error-when-enqueuing-media-upload?replies=1

Seems that the right way to include the media upload functionality on a page is to call wp_enqueue_media() instead of enqueueing the scripts directly:
http://core.trac.wordpress.org/browser/trunk/wp-includes/media.php?rev=22647#L1299

Replying to SergeyBiryukov:

Seems that the right way to include the media upload functionality on a page is to call wp_enqueue_media() instead of enqueueing the scripts directly.

You're correct. We should add some graceful fallbacks for the l10n variable to make sure things don't break when media-upload.js is enqueued as a dependency, though.

The example from the description actually produces two errors:

Timestamp: 19.11.2012 4:31:28
Error: ReferenceError: _wpMediaViewsL10n is not defined
Source File: http://trunk.wordpress/wp-includes/js/media-views.js?ver=3.5-beta3-22645
Line: 9

Timestamp: 19.11.2012 4:31:28
Error: TypeError: wp.media.view.settings is undefined
Source File: http://trunk.wordpress/wp-admin/js/media-upload.js?ver=3.5-beta3-22645
Line: 218

In 22694:

Media: Prevent undefined errors when media scripts are enqueued outside of wp_enqueue_media(). fixes #22495, see #21390.