[wp-trac] [WordPress Trac] #25899: Adding mediaelement CSS links outside of head tags breaks HTML5 validation

[WordPress Trac]

#25899: Adding mediaelement CSS links outside of head tags breaks HTML5 validation
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 Reporter:  AlphaK        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  4.0
Component:  Media         |     Version:  3.6
 Severity:  minor         |  Resolution:
 Keywords:  has-patch     |     Focuses:
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Comment (by Ov3rfly):

 In addition currently the `wp_audio_shortcode_library` filter
 unfortunately can not be used to block the enqueue'ing (and adding the
 script/style/IE9fix to header with some workaround) by returning something
 else than `'mediaelement'` from the filter, because `$library` is not only
 used for the filter but also later in code...

 {{{
 $library = apply_filters( 'wp_audio_shortcode_library', 'mediaelement' );
 if ( 'mediaelement' === $library && did_action( 'init' ) ) {
         wp_enqueue_style( 'wp-mediaelement' );
         wp_enqueue_script( 'wp-mediaelement' );
 }

 [...]

 if ( 'mediaelement' === $library )
         $html .= wp_mediaelement_fallback( $fileurl );

 [...]

 return apply_filters( 'wp_audio_shortcode', $html, $atts, $audio,
 $post_id, $library );
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/25899#comment:6>
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