Print skip-link-focus-fix inline instead of enqueueing as blocking script

functions.php

@@ -221,8 +221,6 @@ function twentynineteen_scripts() {
 
 	wp_style_add_data( 'twentynineteen-style', 'rtl', 'replace' );
 
-	wp_enqueue_script( 'twentynineteen-skip-link-focus-fix', get_template_directory_uri() . '/js/skip-link-focus-fix.js', array(), '20151215', true );
-
 	if ( has_nav_menu( 'menu-1' ) ) {
 		wp_enqueue_script( 'twentynineteen-priority-menu', get_theme_file_uri( '/js/priority-menu.js' ), array(), '1.0', true );
 		wp_enqueue_script( 'twentynineteen-touch-navigation', get_theme_file_uri( '/js/touch-keyboard-navigation.js' ), array(), '1.0', true );
@@ -236,6 +234,24 @@ 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() {
+	// The following is minified via `terser --compress --mangle -- js/skip-link-focus-fix.js`.
+	?>
+	<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' );
+
 /**
  * Enqueue supplemental block editor styles.
  */

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() {