Template:Nankai/plugins/cbpAnimatedHeaderJS
/**
* cbpAnimatedHeader.js v1.0.0 * http://www.codrops.com * * Licensed under the MIT license. * http://www.opensource.org/licenses/mit-license.php * * Copyright 2013, Codrops * http://www.codrops.com */
var cbpAnimatedHeader = (function() {
var docElem = document.documentElement, header = document.querySelector( '.site-header' ), didScroll = false, changeHeaderOn = 300;
function init() { window.addEventListener( 'scroll', function( event ) { if( !didScroll ) { didScroll = true; setTimeout( scrollPage, 250 ); } }, false ); }
function scrollPage() { var sy = scrollY(); if ( sy >= changeHeaderOn ) { classie.add( header, 'site-header-shrink' ); } else { classie.remove( header, 'site-header-shrink' ); } didScroll = false; }
function scrollY() { return window.pageYOffset || docElem.scrollTop; }
init();
})();