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fixed-responsive-nav.js_
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fixed-responsive-nav.js_
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/* =============================================
*
* FIXED RESPONSIVE NAV
*
* (c) 2014 @adtileHQ
* http://www.adtile.me
* http://twitter.com/adtilehq
*
* Free to use under the MIT License.
*
* ============================================= */
(function () {
"use strict";
// Feature test to rule out some older browsers
if ("querySelector" in document && "addEventListener" in window) {
// forEach method, that passes back the stuff we need
var forEach = function (array, callback, scope) {
for (var i = 0; i < array.length; i++) {
callback.call(scope, i, array[i]);
}
};
// Attach FastClick to remove the 300ms tap delay
FastClick.attach(document.body);
// Init smooth scrolling
smoothScroll.init();
// Init Responsive Nav
var navigation = responsiveNav(".nav-collapse", {
// Close the navigation when it's tapped
closeOnNavClick: true
});
// Create a Mask
var mask = document.createElement("div");
mask.className = "mask";
// Append the mask inside <body>
document.body.appendChild(mask);
// Disable mask transitions on Android to boost performance
if (navigator.userAgent.match(/Android/i) !== null) {
document.documentElement.className += " android";
}
// Find navigation links and save a reference to them
var nav = document.querySelector(".nav-collapse ul"),
links = nav.querySelectorAll("[data-scroll]");
// "content" will store all the location cordinates
var content;
// Set up an array of locations which we store in "content"
var setupLocations = function () {
content = [];
forEach(links, function (i, el) {
var href = links[i].getAttribute("href").replace("#", "");
content.push(document.getElementById(href).offsetTop + 200);
});
};
// call locations set up once
setupLocations();
// Re-calculate locations on window resize and orientation change
window.addEventListener("resize", function () {
setupLocations();
}, false);
// Highlight active link on the navigation
var selectActiveMenuItem = function (i) {
forEach(links, function (i, el) {
links[i].parentNode.className = links[i].parentNode.className.replace(/[\s]{0,}active/, "");
});
links[i].parentNode.className += links[i].parentNode.className ? " active" : "active";
};
// Highlight active link when scrolling
var wasNavigationTapped = false;
window.addEventListener("scroll", function () {
// Determine viewport and body size
var top = window.pageYOffset,
body = document.body,
html = document.documentElement,
viewport = window.innerHeight,
bodyheight = Math.max(
body.scrollHeight,
body.offsetHeight,
html.clientHeight,
html.scrollHeight,
html.offsetHeight
);
// For each content link, when it's in viewport, highlight it
if (!wasNavigationTapped) {
forEach(content, function (i, loc) {
if ((loc > top && (loc < top + 300 || (top + viewport) >= bodyheight))) {
selectActiveMenuItem(i);
}
});
}
}, false);
// Close navigation when tapping the mask under it
mask.addEventListener("click", function (e) {
e.preventDefault();
navigation.close();
}, false);
// Clear wasNavigationTapped check after scrolling
var clearTapCheck = function () {
setTimeout(function () {
wasNavigationTapped = false;
}, 500);
};
// Select the right navigation item when tapping the logo
document.querySelector(".logo").addEventListener("click", function (e) {
e.preventDefault();
wasNavigationTapped = true;
// Select first navigation item
selectActiveMenuItem(0);
// Close navigation
navigation.close();
// Remove hash from the URL if pushState is supported
if (history.pushState) {
history.pushState("", document.title, window.location.pathname);
}
// Clear wasNavigationTapped check
clearTapCheck();
}, false);
// When a navigation item is tapped, select it and begin scrolling
forEach(links, function (i, el) {
links[i].addEventListener("click", function (e) {
e.preventDefault();
wasNavigationTapped = true;
// Select right navigation item (we are passing which one to select "i")
selectActiveMenuItem(i);
// Show the URL of the section on the address bar
var thisID = this.getAttribute("href").replace("#", ""),
pane = document.getElementById(thisID);
// If the URL isn't "#home", change it
if (thisID !== "home") {
pane.removeAttribute("id");
location.hash = "#" + thisID;
pane.setAttribute("id", thisID);
// If the URL is "#home", remove hash from the URL
} else {
if (history.pushState) {
history.pushState("", document.title, window.location.pathname);
}
}
// Clear wasNavigationTapped check
clearTapCheck();
}, false);
});
}
})();