$(document).ready(function () {
//Smooth scrolling when click to nav
$('#top-nav > ul > li > a').click(function (e) {
e.preventDefault();
var curLink = $(this);
var scrollPoint = $(curLink.attr('href')).position().top;
$('body,html').animate({
scrollTop: scrollPoint
}, 500);
})
$(window).scroll(function () {
onScrollHandle();
});
function onScrollHandle() {
//Navbar shrink when scroll down
$(".navbar-default").toggleClass("navbar-shrink", $(this).scrollTop() > 50);
//Get current scroll position
var currentScrollPos = $(document).scrollTop();
//Iterate through all node
$('#top-nav > ul > li > a').each(function () {
var curLink = $(this);
var refElem = $(curLink.attr('href'));
//Compare the value of current position and the every section position in each scroll
if (refElem.position().top <= currentScrollPos && refElem.position().top + refElem.height() > currentScrollPos) {
//Remove class active in all nav
$('#top-nav > ul > li').removeClass("active");
//Add class active
curLink.parent().addClass("active");
}
else {
curLink.parent().removeClass("active");
}
});
}
});
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