Changeset 61628 for trunk/src/wp-content/themes/twentytwentyone/functions.php

Timestamp:

02/12/2026 07:56:42 PM (2 months ago)

Author:

joedolson

Message:

Twenty Twenty One: Remove support for Internet Explorer.

No version of Internet Explorer is still supported by WordPress or Microsoft. Usage of Internet Explorer has dropped to about 0.1%.

Remove IE-specific CSS and polyfills.

Props sabernhardt, westonruter, mukesh27, joedolson.
Fixes #64590.

File:

• trunk/src/wp-content/themes/twentytwentyone/functions.php (modified) (8 diffs)

trunk/src/wp-content/themes/twentytwentyone/functions.php

@@ -24 +24 @@
      *
      * @since Twenty Twenty-One 1.0
+     * @since Twenty Twenty-One 2.8 Removed editor stylesheet for Internet Explorer.
      *
      * @return void
@@ -124 +125 @@
         }
 
-        $editor_stylesheet_path = './assets/css/style-editor.css';
-
-        // Note, the is_IE global variable is defined by WordPress and is used
-        // to detect if the current browser is internet explorer.
-        global $is_IE;
-        if ( $is_IE ) {
-            $editor_stylesheet_path = './assets/css/ie-editor.css';
-        }
-
         // Enqueue editor styles.
-        add_editor_style( $editor_stylesheet_path );
+        add_editor_style( './assets/css/style-editor.css' );
 
         // Add custom editor font sizes.
@@ -391 +383 @@
  *
  * @since Twenty Twenty-One 1.0
- *
- * @global bool       $is_IE
- * @global WP_Scripts $wp_scripts
+ * @since Twenty Twenty-One 2.8 Removed Internet Explorer support.
  *
  * @return void
  */
 function twenty_twenty_one_scripts() {
-    // Note, the is_IE global variable is defined by WordPress and is used
-    // to detect if the current browser is internet explorer.
-    global $is_IE, $wp_scripts;
-    if ( $is_IE ) {
-        // If IE 11 or below, use a flattened stylesheet with static values replacing CSS Variables.
-        wp_enqueue_style( 'twenty-twenty-one-style', get_template_directory_uri() . '/assets/css/ie.css', array(), wp_get_theme()->get( 'Version' ) );
-    } else {
-        // If not IE, use the standard stylesheet.
-        wp_enqueue_style( 'twenty-twenty-one-style', get_template_directory_uri() . '/style.css', array(), wp_get_theme()->get( 'Version' ) );
-    }
+    // The standard stylesheet.
+    wp_enqueue_style( 'twenty-twenty-one-style', get_template_directory_uri() . '/style.css', array(), wp_get_theme()->get( 'Version' ) );
 
     // RTL styles.
@@ -420 +402 @@
     }
 
-    // Register the IE11 polyfill file.
+    // Register the handles for unused IE11 polyfill scripts.
     wp_register_script(
         'twenty-twenty-one-ie11-polyfills-asset',
-        get_template_directory_uri() . '/assets/js/polyfills.js',
+        false,
         array(),
         wp_get_theme()->get( 'Version' ),
         array( 'in_footer' => true )
     );
-
-    // Register the IE11 polyfill loader.
     wp_register_script(
         'twenty-twenty-one-ie11-polyfills',
-        null,
+        false,
         array(),
         wp_get_theme()->get( 'Version' ),
         array( 'in_footer' => true )
-    );
-    wp_add_inline_script(
-        'twenty-twenty-one-ie11-polyfills',
-        wp_get_script_polyfill(
-            $wp_scripts,
-            array(
-                'Element.prototype.matches && Element.prototype.closest && window.NodeList && NodeList.prototype.forEach' => 'twenty-twenty-one-ie11-polyfills-asset',
-            )
-        )
     );
 
@@ -452 +423 @@
             'twenty-twenty-one-primary-navigation-script',
             get_template_directory_uri() . '/assets/js/primary-navigation.js',
-            array( 'twenty-twenty-one-ie11-polyfills' ),
+            array(),
             wp_get_theme()->get( 'Version' ),
             array(
@@ -465 +436 @@
         'twenty-twenty-one-responsive-embeds-script',
         get_template_directory_uri() . '/assets/js/responsive-embeds.js',
-        array( 'twenty-twenty-one-ie11-polyfills' ),
+        array(),
         wp_get_theme()->get( 'Version' ),
         array( 'in_footer' => true )
@@ -631 +602 @@
  *
  * @since Twenty Twenty-One 1.0
+ * @deprecated Twenty Twenty-One 2.8 Removed Internet Explorer support.
  *
  * @return void
@@ -648 +620 @@
     }
 }
-add_action( 'wp_footer', 'twentytwentyone_add_ie_class' );
 
 if ( ! function_exists( 'wp_get_list_item_separator' ) ) :