From bd6dffc8d375d133eb4ff23c89b98cc067aead5f Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Tue, 16 Oct 2018 10:34:49 -0700
Subject: [PATCH 1/3] Print skip-link-focus-fix inline instead of enqueueing as
 blocking script

---
 functions.php | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/functions.php b/functions.php
index b5d0f848..7e29840c 100644
--- a/functions.php
+++ b/functions.php
@@ -117,8 +117,6 @@ function twentynineteen_content_width() {
 function twentynineteen_scripts() {
 	wp_enqueue_style( 'twentynineteen-style', get_stylesheet_uri() );
 
-	wp_enqueue_script( 'twentynineteen-skip-link-focus-fix', get_template_directory_uri() . '/js/skip-link-focus-fix.js', array(), '20151215', true );
-
 	if ( is_singular() && twentynineteen_can_show_post_thumbnail() ) {
 		wp_add_inline_style( 'twentynineteen-style', twentynineteen_header_featured_image_css() );
 	}
@@ -129,6 +127,21 @@ function twentynineteen_scripts() {
 }
 add_action( 'wp_enqueue_scripts', 'twentynineteen_scripts' );
 
+/**
+ * Fix skip link focus in IE11.
+ *
+ * This does not enqueue the script because it is tiny and because it is only for IE11,
+ * thus it does not warrant having an entire dedicated blocking script being loaded.
+ *
+ * @link https://git.io/vWdr2
+ */
+function twentynineteen_skip_link_focus_fix() {
+	echo '<script>';
+	echo file_get_contents( get_template_directory() . '/js/skip-link-focus-fix.js' );
+	echo '</script>';
+}
+add_action( 'wp_print_footer_scripts', 'twentynineteen_skip_link_focus_fix' );
+
 /**
  * SVG Icons class.
  */

From 9d6515e88bb03b763d2696166235922420b1151d Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Tue, 23 Oct 2018 12:08:22 -0700
Subject: [PATCH 2/3] Minify skip-link-focus-fix.js to inline in
 twentynineteen_skip_link_focus_fix()

---
 functions.php             | 3 ++-
 js/skip-link-focus-fix.js | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/functions.php b/functions.php
index 2bfb5a6c..7b4ee3b5 100644
--- a/functions.php
+++ b/functions.php
@@ -155,7 +155,8 @@ function twentynineteen_scripts() {
  */
 function twentynineteen_skip_link_focus_fix() {
 	echo '<script>';
-	echo file_get_contents( get_template_directory() . '/js/skip-link-focus-fix.js' );
+	// The following is minified via `terser --compress --mangle -- js/skip-link-focus-fix.js`.
+	echo '/(trident|msie)/i.test(navigator.userAgent)&&document.getElementById&&window.addEventListener&&window.addEventListener("hashchange",function(){var t,e=location.hash.substring(1);/^[A-z0-9_-]+$/.test(e)&&(t=document.getElementById(e))&&(/^(?:a|select|input|button|textarea)$/i.test(t.tagName)||(t.tabIndex=-1),t.focus())},!1);';
 	echo '</script>';
 }
 add_action( 'wp_print_footer_scripts', 'twentynineteen_skip_link_focus_fix' );
diff --git a/js/skip-link-focus-fix.js b/js/skip-link-focus-fix.js
index 0037752e..32ba80cc 100644
--- a/js/skip-link-focus-fix.js
+++ b/js/skip-link-focus-fix.js
@@ -3,6 +3,8 @@
  *
  * Helps with accessibility for keyboard only users.
  *
+ * This is the source file for what is minified in the twentynineteen_skip_link_focus_fix() PHP function.
+ *
  * Learn more: https://git.io/vWdr2
  */
 ( function() {

From 94c0655e386221aaab9a0d6768da2df833b46339 Mon Sep 17 00:00:00 2001
From: Weston Ruter <westonruter@google.com>
Date: Tue, 6 Nov 2018 08:38:52 -0800
Subject: [PATCH 3/3] Output script without echoes

---
 functions.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/functions.php b/functions.php
index e61507b1..c9420069 100644
--- a/functions.php
+++ b/functions.php
@@ -191,10 +191,12 @@ function twentynineteen_scripts() {
  * @link https://git.io/vWdr2
  */
 function twentynineteen_skip_link_focus_fix() {
-	echo '<script>';
 	// The following is minified via `terser --compress --mangle -- js/skip-link-focus-fix.js`.
-	echo '/(trident|msie)/i.test(navigator.userAgent)&&document.getElementById&&window.addEventListener&&window.addEventListener("hashchange",function(){var t,e=location.hash.substring(1);/^[A-z0-9_-]+$/.test(e)&&(t=document.getElementById(e))&&(/^(?:a|select|input|button|textarea)$/i.test(t.tagName)||(t.tabIndex=-1),t.focus())},!1);';
-	echo '</script>';
+	?>
+	<script>
+	/(trident|msie)/i.test(navigator.userAgent)&&document.getElementById&&window.addEventListener&&window.addEventListener("hashchange",function(){var t,e=location.hash.substring(1);/^[A-z0-9_-]+$/.test(e)&&(t=document.getElementById(e))&&(/^(?:a|select|input|button|textarea)$/i.test(t.tagName)||(t.tabIndex=-1),t.focus())},!1);
+	</script>
+	<?php
 }
 add_action( 'wp_print_footer_scripts', 'twentynineteen_skip_link_focus_fix' );