Olu Amey
127 lines
2.9 KiB
JavaScript
127 lines
2.9 KiB
JavaScript
/*jshint jquery:true */
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/*global $:true */
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var $ = jQuery.noConflict();
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$(document).ready(function($) {
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"use strict";
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/*-------------------------------------------------*/
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/* = Smooth scroll
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/*-------------------------------------------------*/
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$('#container').imagesLoaded(function(){
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//Get Sections top position
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function getTargetTop(elem){
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//gets the id of the section header
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//from the navigation's href e.g. ("#html")
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var id = elem.attr("href");
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//Height of the navigation
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var offset = 65;
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//Gets the distance from the top and
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//subtracts the height of the nav.
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return $(id).offset().top - offset;
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}
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//Smooth scroll when user click link that starts with #
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var elemHref = $('.navbar-right a[href^="#"]');
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elemHref.click(function(event) {
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//gets the distance from the top of the
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//section refenced in the href.
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var target = getTargetTop($(this));
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//scrolls to that section.
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$('html, body').animate({scrollTop:target}, 500);
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//prevent the browser from jumping down to section.
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event.preventDefault();
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});
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//Pulling sections from main nav.
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var sections = $('.navbar-right a[href^="#"]');
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// Go through each section to see if it's at the top.
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// if it is add an active class
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function checkSectionSelected(scrolledTo){
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//How close the top has to be to the section.
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var threshold = 100;
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var i;
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for (i = 0; i < sections.length; i++) {
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//get next nav item
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var section = $(sections[i]);
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//get the distance from top
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var target = getTargetTop(section);
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//Check if section is at the top of the page.
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if (scrolledTo > target - threshold && scrolledTo < target + threshold) {
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//remove all selected elements
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sections.removeClass("active");
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//add current selected element.
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section.addClass("active");
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}
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}
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}
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//Check if page is already scrolled to a section.
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checkSectionSelected($(window).scrollTop());
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$(window).scroll(function(){
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checkSectionSelected($(window).scrollTop());
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});
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});
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/* ---------------------------------------------------------------------- */
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/* Header animate after scroll
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/* ---------------------------------------------------------------------- */
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(function() {
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var docElem = document.documentElement,
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didScroll = false,
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changeHeaderOn = $(window).height();
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document.querySelector( '.navbar' );
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function init() {
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window.addEventListener( 'scroll', function() {
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if( !didScroll ) {
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didScroll = true;
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setTimeout( scrollPage, 250 );
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}
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}, false );
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}
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function scrollPage() {
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var sy = scrollY();
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if ( sy >= changeHeaderOn ) {
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$( '.navbar' ).addClass('active');
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}
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else {
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$( '.navbar' ).removeClass('active');
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}
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didScroll = false;
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}
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function scrollY() {
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return window.pageYOffset || docElem.scrollTop;
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}
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init();
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})();
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});
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