WP_Customize_Manager::is_preview()

Is it a theme preview?

Return

(bool) True if it's a preview, false if not.

	public function is_preview() {
		return (bool) $this->previewing;
	}

Used By
Used By	Description
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::handle_override_changeset_lock_request()	Removes changeset lock when take over request is sent via Ajax.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::refresh_nonces()	Refresh nonces for the current preview.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::handle_dismiss_autosave_or_lock_request()	Delete a given auto-draft changeset or the autosave revision for a given changeset or delete changeset lock.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::start_previewing_theme()	If the theme to be previewed isn’t the active theme, add filter callbacks to swap it out at runtime.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::stop_previewing_theme()	Stop previewing the selected theme.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::wp_loaded()	Register styles/scripts and initialize the preview of each setting
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::wp_redirect_status()	Prevents Ajax requests from following redirects when previewing a theme by issuing a 200 response instead of a 30x.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::save()	Handle customize_save WP Ajax request to save/update a changeset.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::handle_changeset_trash_request()	Handle request to trash a changeset.

Changelog
Version	Description
WP-3.4.0	Introduced.