diff --git a/app/filters.php b/app/filters.php
index d30d166..16fe4d5 100644
--- a/app/filters.php
+++ b/app/filters.php
@@ -13,6 +13,11 @@ add_filter('body_class', function (array $classes) {
         }
     }
 
+    /** Add a global class to everything.
+     *  We want it to come first, so stuff its filter does can be overridden.
+     */
+    array_unshift($classes, 'app');
+
     /** Add class if sidebar is active */
     if (display_sidebar()) {
         $classes[] = 'sidebar-primary';
@@ -75,3 +80,15 @@ add_filter('comments_template', function ($comments_template) {
 add_filter('get_search_form', function () {
     return template('partials.searchform');
 });
+
+/**
+ * Collect data for searchform.
+ */
+add_filter('sage/template/app/data', function ($data) {
+    $data['sf_action'] = esc_url(home_url('/'));
+    $data['sf_screen_reader_text'] = _x('Search for:', 'label', 'sage');
+    $data['sf_placeholder'] = esc_attr_x('Search …', 'placeholder', 'sage');
+    $data['sf_current_query'] = get_search_query();
+    $data['sf_submit_text'] = esc_attr_x('Search', 'submit button', 'sage');
+    return $data;
+});
diff --git a/resources/views/partials/searchform.blade.php b/resources/views/partials/searchform.blade.php
index ff35d92..d4b5847 100644
--- a/resources/views/partials/searchform.blade.php
+++ b/resources/views/partials/searchform.blade.php
@@ -1,7 +1,7 @@
-<form role="search" method="get" class="search-form" action="{{ esc_url(home_url('/')) }}">
+<form role="search" method="get" class="search-form" action="{{ $sf_action }}">
   <label>
-    <span class="screen-reader-text">{{ _x('Search for:', 'label', 'sage') }}</span>
-    <input type="search" class="search-field" placeholder="{!! esc_attr_x('Search &hellip;', 'placeholder', 'sage') !!}" value="{{ get_search_query() }}" name="s">
+    <span class="screen-reader-text">{{ $sf_screen_reader_text }}</span>
+    <input type="search" class="search-field" placeholder="{!! $sf_placeholder !!}" value="{{ $sf_current_query }}" name="s">
   </label>
-  <input type="submit" class="search-submit" value="{{ esc_attr_x('Search', 'submit button', 'sage') }}">
+  <input type="submit" class="search-submit" value="{{ $sf_submit_text }}">
 </form>