nirav7707 · Mar 19, 2026 · Mar 23, 2026 · May 21, 2026 · Jun 16, 2026 · Jul 15, 2026
diff --git a/src/wp-admin/customize.php b/src/wp-admin/customize.php
@@ -198,7 +198,7 @@
 			<?php if ( $compatible_wp && $compatible_php ) : ?>
 				<?php $save_text = $wp_customize->is_theme_active() ? __( 'Publish' ) : __( 'Activate &amp; Publish' ); ?>
 				<div id="customize-save-button-wrapper" class="customize-save-button-wrapper" >
-					<?php submit_button( $save_text, 'primary button-compact save', 'save', false ); ?>
+					<?php submit_button( $save_text, 'primary compact save', 'save', false ); ?>
 					<button id="publish-settings" class="publish-settings button-primary button-compact button dashicons dashicons-admin-generic" aria-label="<?php esc_attr_e( 'Publish Settings' ); ?>" aria-expanded="false" disabled></button>
 				</div>
 			<?php else : ?>

diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -442,7 +442,7 @@ protected function extra_tablenav( $which ) {
 
 			if ( ! empty( $output ) && $this->has_items() ) {
 				echo $output;
-				submit_button( __( 'Filter' ), 'button-compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
+				submit_button( __( 'Filter' ), 'compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
 			}
 		}
 

diff --git a/src/wp-admin/includes/class-wp-links-list-table.php b/src/wp-admin/includes/class-wp-links-list-table.php
@@ -123,7 +123,7 @@ protected function extra_tablenav( $which ) {
 
 			wp_dropdown_categories( $dropdown_options );
 
-			submit_button( __( 'Filter' ), 'button-compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
+			submit_button( __( 'Filter' ), 'compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
 			?>
 		</div>
 		<?php

diff --git a/src/wp-admin/includes/class-wp-list-table.php b/src/wp-admin/includes/class-wp-list-table.php
@@ -416,7 +416,7 @@ public function search_box( $text, $input_id ) {
 <p class="search-box">
 	<label class="screen-reader-text" for="<?php echo esc_attr( $input_id ); ?>"><?php echo $text; ?>:</label>
 	<input type="search" id="<?php echo esc_attr( $input_id ); ?>" name="s" value="<?php _admin_search_query(); ?>" />
-		<?php submit_button( $text, 'button-compact', '', false, array( 'id' => 'search-submit' ) ); ?>
+		<?php submit_button( $text, 'compact', '', false, array( 'id' => 'search-submit' ) ); ?>
 </p>
 		<?php
 	}
@@ -632,7 +632,7 @@ protected function bulk_actions( $which = '' ) {
 
 		echo "</select>\n";
 
-		submit_button( __( 'Apply' ), 'action button-compact', 'bulk_action', false, array( 'id' => "doaction$two" ) );
+		submit_button( __( 'Apply' ), 'action compact', 'bulk_action', false, array( 'id' => "doaction$two" ) );
 		echo "\n";
 	}
 

diff --git a/src/wp-admin/includes/class-wp-media-list-table.php b/src/wp-admin/includes/class-wp-media-list-table.php
@@ -242,12 +242,12 @@ protected function extra_tablenav( $which ) {
 			/** This action is documented in wp-admin/includes/class-wp-posts-list-table.php */
 			do_action( 'restrict_manage_posts', $this->screen->post_type, $which );
 
-			submit_button( __( 'Filter' ), 'button-compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
+			submit_button( __( 'Filter' ), 'compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
 
 			if ( $this->is_trash && $this->has_items()
 				&& current_user_can( 'edit_others_posts' )
 			) {
-				submit_button( __( 'Empty Trash' ), 'apply button-compact', 'delete_all', false );
+				submit_button( __( 'Empty Trash' ), 'apply compact', 'delete_all', false );
 			}
 			?>
 		</div>

diff --git a/src/wp-admin/includes/class-wp-posts-list-table.php b/src/wp-admin/includes/class-wp-posts-list-table.php
@@ -596,7 +596,7 @@ protected function extra_tablenav( $which ) {
 
 			if ( ! empty( $output ) ) {
 				echo $output;
-				submit_button( __( 'Filter' ), 'button-compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
+				submit_button( __( 'Filter' ), 'compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
 			}
 		}
 

diff --git a/src/wp-admin/includes/media.php b/src/wp-admin/includes/media.php
@@ -2905,7 +2905,7 @@ function media_upload_library_form( $errors ) {
 			</select>
 		<?php } ?>
 
-		<?php submit_button( __( 'Filter &#187;' ), 'button-compact', 'post-query-submit', false ); ?>
+		<?php submit_button( __( 'Filter &#187;' ), 'compact', 'post-query-submit', false ); ?>
 
 	</div>
 

diff --git a/src/wp-admin/includes/template.php b/src/wp-admin/includes/template.php
@@ -2562,7 +2562,7 @@ function compression_test() {
  *
  * @param string       $text             Optional. The text of the button. Defaults to 'Save Changes'.
  * @param string       $type             Optional. The type and CSS class(es) of the button. Core values
- *                                       include 'primary', 'small', and 'large'. Default 'primary'.
+ *                                       include 'primary', 'small', 'compact' and 'large'. Default 'primary'.
  * @param string       $name             Optional. The HTML name of the submit button. If no `id` attribute
  *                                       is given in the `$other_attributes` parameter, `$name` will be used
  *                                       as the button's `id`. Default 'submit'.
@@ -2586,7 +2586,7 @@ function submit_button( $text = '', $type = 'primary', $name = 'submit', $wrap =
  *
  * @param string       $text             Optional. The text of the button. Defaults to 'Save Changes'.
  * @param string       $type             Optional. The type and CSS class(es) of the button. Core values
- *                                       include 'primary', 'small', and 'large'. Default 'primary large'.
+ *                                       include 'primary', 'small', 'compact' and 'large'. Default 'primary large'.
  * @param string       $name             Optional. The HTML name of the submit button. If no `id` attribute
  *                                       is given in the `$other_attributes` parameter, `$name` will be used
  *                                       as the button's `id`. Default 'submit'.
@@ -2605,7 +2605,7 @@ function get_submit_button( $text = '', $type = 'primary large', $name = 'submit
 		$type = explode( ' ', $type );
 	}
 
-	$button_shorthand = array( 'primary', 'small', 'large' );
+	$button_shorthand = array( 'primary', 'small', 'large', 'compact' );
 	$classes          = array( 'button' );
 
 	foreach ( $type as $t ) {

diff --git a/tests/phpunit/tests/admin/includesTemplate.php b/tests/phpunit/tests/admin/includesTemplate.php
@@ -510,4 +510,41 @@ public function test_get_post_states_with_null_returns_empty_array() {
 		$result = get_post_states( null );
 		$this->assertSame( array(), $result, 'get_post_states() should return an empty array when WP_Post is not supplied.' );
 	}
+
+	/**
+	 * Tests that get_submit_button() expands the type shorthands into their
+	 * `button-*` classes.
+	 *
+	 * @ticket 64892
+	 *
+	 * @covers ::get_submit_button
+	 *
+	 * @dataProvider data_get_submit_button_shorthand
+	 *
+	 * @param string|array $type     The type argument passed to get_submit_button().
+	 * @param string       $expected The expected class attribute value.
+	 */
+	public function test_get_submit_button_expands_type_shorthands( $type, $expected ) {
+		$button = get_submit_button( 'Save', $type, 'submit', false );
+
+		$this->assertStringContainsString( 'class="' . $expected . '"', $button );
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array[]
+	 */
+	public function data_get_submit_button_shorthand() {
+		return array(
+			'primary shorthand'            => array( 'primary', 'button button-primary' ),
+			'small shorthand'              => array( 'small', 'button button-small' ),
+			'large shorthand'              => array( 'large', 'button button-large' ),
+			'compact shorthand'            => array( 'compact', 'button button-compact' ),
+			'multiple shorthands'          => array( 'primary compact', 'button button-primary button-compact' ),
+			'non-shorthand with compact'   => array( 'action compact', 'button action button-compact' ),
+			'array type with compact'      => array( array( 'primary', 'compact' ), 'button button-primary button-compact' ),
+			'raw button-compact unchanged' => array( 'button-compact', 'button button-compact' ),
+		);
+	}
 }
-Original file line number
+Diff line change
@@ Expand Up / @@ -123,7 +123,7 @@ protected function extra_tablenav( $which ) { @@
     			wp_dropdown_categories( $dropdown_options );
-    			submit_button( __( 'Filter' ), 'button-compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
+    			submit_button( __( 'Filter' ), 'compact', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
     			?>
     		</div>
     		<?php
@@ Expand Down @@