/',
			$link,
			$item_output,
			1 // Limit.
		);

		// Replace closing </a> with </button>.
		$item_output = preg_replace(
			'#</a>#i',
			'</button>',
			$item_output,
			1 // Limit.
		);

	} elseif ( in_array( 'menu-item-has-children', $item->classes, true ) ) {

		// Add SVG icon to parent items.
		$icon = twentynineteen_get_icon_svg( 'keyboard_arrow_down', 24 );

		$item_output .= sprintf(
			'<button class="submenu-expand" tabindex="-1">%s</button>',
			$icon
		);
	}

	return $item_output;
}
add_filter( 'walker_nav_menu_start_el', 'twentynineteen_add_dropdown_icons', 10, 4 );
{"code":"rest_no_route","message":"Kh\u00f4ng t\u00ecm th\u1ea5y \u0111\u01b0\u1eddng d\u1eabn n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi URL v\u00e0 ph\u01b0\u01a1ng th\u1ee9c y\u00eau c\u1ea7u.","data":{"status":404}}