Ticket #36735: 36735.2.patch

src/wp-includes/js/media-editor.js

@@ -55 +55 @@
                         fallbacks = function( props ) {
                                 // Generate alt fallbacks and strip tags.
                                 if ( 'image' === props.type && ! props.alt ) {
-                                        props.alt = props.caption || props.title || '';
+                                        if ( props.caption ) {
+                                                props.alt = props.caption;
+                                        } else if ( props.title !== props.url ) {
+                                                props.alt = props.title;
+                                        } else {
+                                                props.alt = '';
+                                        }
+
                                         props.alt = props.alt.replace( /<\/?[^>]+>/g, '' );
                                         props.alt = props.alt.replace( /[\r\n]+/g, ' ' );
                                 }
@@ -894 +901 @@
                                                 title:   embed.url,
                                                 linkUrl: '',
                                                 align:   'none',
-                                                link:    'none'
+                                                link:    'none',
+                                                type:    'image'
                                         });
 
                                         if ( 'none' === embed.link ) {