Ticket #10891: script-conditionals.diff

wp-includes/class.wp-scripts.php

@@ -117 +117 @@
                 $src = add_query_arg('ver', $ver, $src);
                 $src = esc_url(apply_filters( 'script_loader_src', $src, $handle ));
 
+                $end_cond = $tag = '';
+                if ( isset($this->registered[$handle]->extra['conditional']) && $this->registered[$handle]->extra['conditional'] ) {
+                        $tag .= "<!--[if {$this->registered[$handle]->extra['conditional']}]>\n";
+                        $end_cond = "<![endif]-->\n";
+                }
+
+                $tag .= apply_filters( 'script_loader_tag', "<script type='text/javascript' src='$src'></script>\n", $handle );
+
+                $tag .= $end_cond;
+
                 if ( $this->do_concat )
-                        $this->print_html .= "<script type='text/javascript' src='$src'></script>\n";
+                        $this->print_html .= $tag;
                 else
-                        echo "<script type='text/javascript' src='$src'></script>\n";
+                        echo $tag;
 
                 return true;
         }