111 lines
3.3 KiB
JavaScript
111 lines
3.3 KiB
JavaScript
// Dean Attali / Beautiful Jekyll 2016
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var main = {
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bigImgEl : null,
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numImgs : null,
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init : function() {
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// Shorten the navbar after scrolling a little bit down
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$(window).scroll(function() {
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if ($(".navbar").offset().top > 50) {
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$(".navbar").addClass("top-nav-short");
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} else {
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$(".navbar").removeClass("top-nav-short");
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}
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});
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// On mobile, hide the avatar when expanding the navbar menu
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$('#main-navbar').on('show.bs.collapse', function () {
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$(".navbar").addClass("top-nav-expanded");
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});
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$('#main-navbar').on('hidden.bs.collapse', function () {
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$(".navbar").removeClass("top-nav-expanded");
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});
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// On mobile, when clicking on a multi-level navbar menu, show the child links
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$('#main-navbar').on("click", ".navlinks-parent", function(e) {
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var target = e.target;
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$.each($(".navlinks-parent"), function(key, value) {
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if (value == target) {
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$(value).parent().toggleClass("show-children");
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} else {
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$(value).parent().removeClass("show-children");
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}
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});
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});
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// show the big header image
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main.initImgs();
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},
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initImgs : function() {
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// If the page was large images to randomly select from, choose an image
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if ($("#header-big-imgs").length > 0) {
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main.bigImgEl = $("#header-big-imgs");
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main.numImgs = main.bigImgEl.attr("data-num-img");
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// 2fc73a3a967e97599c9763d05e564189
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// set an initial image
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var imgInfo = main.getImgInfo();
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var src = imgInfo.src;
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var desc = imgInfo.desc;
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main.setImg(src, desc);
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// For better UX, prefetch the next image so that it will already be loaded when we want to show it
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var getNextImg = function() {
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var imgInfo = main.getImgInfo();
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var src = imgInfo.src;
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var desc = imgInfo.desc;
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var prefetchImg = new Image();
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prefetchImg.src = src;
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// if I want to do something once the image is ready: `prefetchImg.onload = function(){}`
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setTimeout(function(){
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var img = $("<div></div>").addClass("big-img-transition").css("background-image", 'url(' + src + ')');
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$(".intro-header.big-img").prepend(img);
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setTimeout(function(){ img.css("opacity", "1"); }, 50);
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// after the animation of fading in the new image is done, prefetch the next one
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//img.one("transitioned webkitTransitionEnd oTransitionEnd MSTransitionEnd", function(){
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setTimeout(function() {
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main.setImg(src, desc);
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img.remove();
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getNextImg();
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}, 1000);
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//});
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}, 6000);
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};
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// If there are multiple images, cycle through them
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if (main.numImgs > 1) {
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getNextImg();
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}
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}
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},
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getImgInfo : function() {
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var randNum = Math.floor((Math.random() * main.numImgs) + 1);
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var src = main.bigImgEl.attr("data-img-src-" + randNum);
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var desc = main.bigImgEl.attr("data-img-desc-" + randNum);
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return {
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src : src,
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desc : desc
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}
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},
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setImg : function(src, desc) {
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$(".intro-header.big-img").css("background-image", 'url(' + src + ')');
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if (typeof desc !== typeof undefined && desc !== false) {
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$(".img-desc").text(desc).show();
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} else {
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$(".img-desc").hide();
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}
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}
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};
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// 2fc73a3a967e97599c9763d05e564189
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document.addEventListener('DOMContentLoaded', main.init); |