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This Conditional Tag checks whether widget is displayed on the front-end. This is a boolean function, meaning it returns either TRUE or FALSE.
<?php is_active_widget( $callback, $widget_id, $id_base, $skip_inactive ); ?>
<?php
if ( is_active_widget( false, false, $this->id_base, true ) ) {
wp_enqueue_script( 'jquery' );
}
?>
Since: 2.2.0
is_active_widget() is located in wp-includes/widgets.php.
Sidebars: is_active_sidebar(), register_sidebars(), register_sidebar(), unregister_sidebar(), is_dynamic_sidebar(), dynamic_sidebar(), wp_register_sidebar_widget(), wp_unregister_sidebar_widget(), wp_get_sidebars_widgets(), wp_set_sidebars_widgets()
Widgets: is_active_widget(), the_widget(), register_widget(), unregister_widget(), wp_register_widget_control(), wp_unregister_widget_control(), wp_convert_widget_settings(), wp_get_widget_defaults(), wp_widget_description()
Conditional Tags: comments_open(), is_404(), is_admin(), is_archive(), is_attachment(), is_author(), is_category(), is_comments_popup(), is_date(), is_day(), is_feed(), is_front_page(), is_home(), is_local_attachment(), is_multi_author, is_month(), is_new_day(), is_page(), is_page_template(), is_paged(), is plugin active(), is_plugin_page(), is_post_type_archive(), is_preview(), is_search(), is_single(), is_singular(), is_sticky(), is_tag(), is_tax(), is_taxonomy_hierarchical(), is_time(), is_trackback(), is_year(), in_category(), in_the_loop(), is_active_sidebar(), is_active_widget(), is_blog_installed(), is_rtl(), is_dynamic_sidebar(), is_user_logged_in(), has_excerpt(), has_post_thumbnail(), has_tag(), pings_open(), email exists(), post_type_exists(), taxonomy_exists(), term_exists(), username exists()