wp-includes/customize/class-wp-customize-nav-menu-section.php:35Get section parameters for JS.
array public function json() { $exported = parent::json(); $exported['menu_id'] = (int) preg_replace( '/^nav_menu\[(-?\d+)\]/', '$1', $this->id ); return $exported; }Introduced in 4.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/customize/class-wp-customize-nav-menu-section.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.