/**
 * navigation.js
 *
 * Handles toggling the navigation menu for small screens.
 */
( function() {
	var container, button, menu;

	container = document.getElementById( 'site-navigation' );
	if ( ! container )
		return;

	button = container.getElementsByTagName( 'label' )[0];
	if ( 'undefined' === typeof button )
		return;

	menu = container.getElementsByTagName( 'ul' )[0];

	// Hide menu toggle button if menu is empty and return early.
	if ( 'undefined' === typeof menu ) {
		button.style.display = 'none';
		return;
	}

	if ( -1 === menu.className.indexOf( 'nav-menu' ) )
		menu.className += ' nav-menu';

	button.onclick = function() {
		if ( -1 !== container.className.indexOf( 'toggled' ) )
			container.className = container.className.replace( ' toggled', '' );
		else
			container.className += ' toggled';
	};
} )();


/*
playback timings (ms):
  LoadShardBlock: 108.202 (3)
  esindex: 0.008
  captures_list: 122.746
  CDXLines.iter: 10.94 (3)
  PetaboxLoader3.datanode: 739.416 (4)
  exclusion.robots.fetch: 0.194 (4)
  exclusion.robots: 0.658
  exclusion.robots.policy: 0.301
  RedisCDXSource: 0.632
  PetaboxLoader3.resolve: 97.402
  load_resource: 748.697
*/