Upgrading Casper to 2.9.0

Closes https://github.com/TryGhost/Casper/pull/513

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2013-2018 Ghost Foundation
+Copyright (c) 2013-2019 Ghost Foundation
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation

README.md

@@ -63,4 +63,4 @@ You can add your own SVG icons in the same manner.
 
 # Copyright & License
 
-Copyright (c) 2013-2018 Ghost Foundation - Released under the [MIT license](LICENSE).
+Copyright (c) 2013-2019 Ghost Foundation - Released under the [MIT license](LICENSE).

assets/built/infinitescroll.js

@@ -1,2 +1,2 @@
-$(function(t){var o=1,r=window.location.pathname,a=t(document),s=t(".post-feed"),c=300,l=!1,w=!1,d=window.scrollY,v=window.innerHeight,u=a.height();function f(){d=window.scrollY,e()}function g(){v=window.innerHeight,u=a.height(),e()}function e(){l||requestAnimationFrame(n),l=!0}function n(){var e,n;if(n=/(?:page\/)(\d)(?:\/)$/i,(e=(e=r).replace(/#(.*)$/g,"").replace("////g","/")).match(n)&&(o=parseInt(e.match(n)[1]),e=e.replace(n,"")),r=e,!w)if(d+v<=u-c)l=!1;else{if(o>=maxPages)return window.removeEventListener("scroll",f,{passive:!0}),void window.removeEventListener("resize",g);w=!0;var i=r+"page/"+(o+=1)+"/";t.get(i,function(e){var n=document.createRange().createContextualFragment(e).querySelectorAll(".post");n.length&&[].forEach.call(n,function(e){s[0].appendChild(e)})}).fail(function(e){404===e.status&&(window.removeEventListener("scroll",f,{passive:!0}),window.removeEventListener("resize",g))}).always(function(){u=a.height(),l=w=!1})}}window.addEventListener("scroll",f,{passive:!0}),window.addEventListener("resize",g),n()});
+!function(n,t){var r=t.querySelector("link[rel=next]");if(r){var i=t.querySelector(".post-feed");if(i){var o=300,s=!1,l=!1,c=n.scrollY,u=n.innerHeight,d=t.documentElement.scrollHeight;n.addEventListener("scroll",a,{passive:!0}),n.addEventListener("resize",m),f()}}function v(){if(404===this.status)return n.removeEventListener("scroll",a),void n.removeEventListener("resize",m);this.response.querySelectorAll(".post-card").forEach(function(e){i.appendChild(e)});var e=this.response.querySelector("link[rel=next]");e?r.href=e.href:(n.removeEventListener("scroll",a),n.removeEventListener("resize",m)),d=t.documentElement.scrollHeight,l=s=!1}function e(){if(!l)if(c+u<=d-o)s=!1;else{l=!0;var e=new n.XMLHttpRequest;e.responseType="document",e.addEventListener("load",v),e.open("GET",r.href),e.send(null)}}function f(){s||n.requestAnimationFrame(e),s=!0}function a(){c=n.scrollY,f()}function m(){u=n.innerHeight,d=t.documentElement.scrollHeight,f()}}(window,document);
 //# sourceMappingURL=infinitescroll.js.map

assets/css/screen.css

@@ -142,8 +142,8 @@ body {
     background: linear-gradient(rgba(0,0,0,0.1),rgba(0,0,0,0));
 }
 
-.site-header.no-cover:before,
-.site-header.no-cover:after {
+.site-header.no-image:before,
+.site-header.no-image:after {
     display: none;
 }
 
@@ -411,10 +411,10 @@ The knock-on effect of this is ugly browser-scroll bars at the bottom, so 80px o
 }
 
 .post-card-image {
-    width: auto;
+    width: 100%;
     height: 200px;
     background: var(--lightgrey) no-repeat center center;
-    background-size: cover;
+    object-fit: cover;
 }
 
 .post-card-content-link {
@@ -595,46 +595,48 @@ The knock-on effect of this is ugly browser-scroll bars at the bottom, so 80px o
 
 /* Special Styling for home page grid (below):
 
-The first (most recent) post in the list is styled to be bigger than the others and take over the full width of the grid to give it more emphasis. Wrapped in a media query to make sure this only happens on large viewports / desktop-ish devices.
+The first post in the list is styled to be bigger than the others and take over
+the full width of the grid to give it more emphasis. Wrapped in a media query to
+make sure this only happens on large viewports / desktop-ish devices.
 
  */
 
 @media (min-width: 795px) {
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) {
+    .post-card-large {
         flex: 1 1 100%;
         flex-direction: row;
     }
 
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) .post-card-image-link {
+    .post-card-large .post-card-image-link {
         position: relative;
         flex: 1 1 auto;
         border-radius: 5px 0 0 5px;
     }
 
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) .post-card-image {
+    .post-card-large .post-card-image {
         position: absolute;
         width: 100%;
         height: 100%;
     }
 
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) .post-card-content {
+    .post-card-large .post-card-content {
         flex: 0 1 357px;
     }
 
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) h2 {
+    .post-card-large h2 {
         font-size: 2.6rem;
     }
 
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) p {
+    .post-card-large p {
         font-size: 1.8rem;
         line-height: 1.55em;
     }
 
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) .post-card-content-link {
+    .post-card-large .post-card-content-link {
         padding: 30px 40px 0;
     }
 
-    .home-template .post-feed .post-card:nth-child(6n+1):not(.no-image) .post-card-meta {
+    .post-card-large .post-card-meta {
         padding: 0 40px 30px;
     }
 }
@@ -709,22 +711,29 @@ The first (most recent) post in the list is styled to be bigger than the others
 
 .post-full-image {
     margin: 0 -10vw -165px;
-    height: 800px;
     background: var(--lightgrey) center center;
-    background-size: cover;
     border-radius: 5px;
+    overflow: hidden;
+}
+
+.post-full-image img {
+    width: 100%;
+    height: 800px;
+    object-fit: cover;
 }
 
 @media (max-width: 1170px) {
     .post-full-image {
         margin: 0 -4vw -100px;
-        height: 600px;
         border-radius: 0;
     }
+    .post-full-image img {
+        height: 600px;
+    }
 }
 
 @media (max-width: 800px) {
-    .post-full-image {
+    .post-full-image img {
         height: 400px;
     }
 }

assets/js/infinitescroll.js

@@ -1,19 +1,78 @@
-/* global maxPages */
+/**
+ * Infinite Scroll
+ */
+
+(function(window, document) {
+    // next link element
+    var nextElement = document.querySelector('link[rel=next]');
+    if (!nextElement) return;
+
+    // post feed element
+    var feedElement = document.querySelector('.post-feed');
+    if (!feedElement) return;
 
-// Code snippet inspired by https://github.com/douglasrodrigues5/ghost-blog-infinite-scroll
-$(function ($) {
-    var currentPage = 1;
-    var pathname = window.location.pathname;
-    var $document = $(document);
-    var $result = $('.post-feed');
     var buffer = 300;
 
     var ticking = false;
-    var isLoading = false;
+    var loading = false;
 
     var lastScrollY = window.scrollY;
     var lastWindowHeight = window.innerHeight;
-    var lastDocumentHeight = $document.height();
+    var lastDocumentHeight = document.documentElement.scrollHeight;
+
+    function onPageLoad() {
+        if (this.status === 404) {
+            window.removeEventListener('scroll', onScroll);
+            window.removeEventListener('resize', onResize);
+            return;
+        }
+
+        // append contents
+        var postElements = this.response.querySelectorAll('.post-card');
+        postElements.forEach(function (item) {
+            feedElement.appendChild(item);
+        });
+
+        // set next link
+        var resNextElement = this.response.querySelector('link[rel=next]');
+        if (resNextElement) {
+            nextElement.href = resNextElement.href;
+        } else {
+            window.removeEventListener('scroll', onScroll);
+            window.removeEventListener('resize', onResize);
+        }
+
+        // sync status
+        lastDocumentHeight = document.documentElement.scrollHeight;
+        ticking = false;
+        loading = false;
+    }
+
+    function onUpdate() {
+        // return if already loading
+        if (loading) return;
+
+        // return if not scroll to the bottom
+        if (lastScrollY + lastWindowHeight <= lastDocumentHeight - buffer) {
+            ticking = false;
+            return;
+        }
+
+        loading = true;
+
+        var xhr = new window.XMLHttpRequest();
+        xhr.responseType = 'document';
+
+        xhr.addEventListener('load', onPageLoad);
+
+        xhr.open('GET', nextElement.href);
+        xhr.send(null);
+    }
+
+    function requestTick() {
+        ticking || window.requestAnimationFrame(onUpdate);
+        ticking = true;
+    }
 
     function onScroll() {
         lastScrollY = window.scrollY;
@@ -22,94 +81,12 @@ $(function ($) {
 
     function onResize() {
         lastWindowHeight = window.innerHeight;
-        lastDocumentHeight = $document.height();
+        lastDocumentHeight = document.documentElement.scrollHeight;
         requestTick();
     }
 
-    function requestTick() {
-        if (!ticking) {
-            requestAnimationFrame(infiniteScroll);
-        }
-        ticking = true;
-    }
-
-    function sanitizePathname(path) {
-        var paginationRegex = /(?:page\/)(\d)(?:\/)$/i;
-
-        // remove hash params from path
-        path = path.replace(/#(.*)$/g, '').replace('////g', '/');
-
-        // remove pagination from the path and replace the current pages
-        // with the actual requested page. E. g. `/page/3/` indicates that
-        // the user actually requested page 3, so we should request page 4
-        // next, unless it's the last page already.
-        if (path.match(paginationRegex)) {
-            currentPage = parseInt(path.match(paginationRegex)[1]);
-
-            path = path.replace(paginationRegex, '');
-        }
-
-        return path;
-    }
-
-    function infiniteScroll() {
-        // sanitize the pathname from possible pagination or hash params
-        pathname = sanitizePathname(pathname);
-
-        // return if already loading
-        if (isLoading) {
-            return;
-        }
-
-        // return if not scroll to the bottom
-        if (lastScrollY + lastWindowHeight <= lastDocumentHeight - buffer) {
-            ticking = false;
-            return;
-        }
-
-        /**
-        * maxPages is defined in default.hbs and is the value
-        * of the amount of pagination pages.
-        * If we reached the last page or are past it,
-        * we return and disable the listeners.
-        */
-        if (currentPage >= maxPages) {
-            window.removeEventListener('scroll', onScroll, {passive: true});
-            window.removeEventListener('resize', onResize);
-            return;
-        }
-
-        isLoading = true;
-
-        // next page
-        currentPage += 1;
-
-        // Load more
-        var nextPage = pathname + 'page/' + currentPage + '/';
-
-        $.get(nextPage, function (content) {
-            var parse = document.createRange().createContextualFragment(content);
-            var posts = parse.querySelectorAll('.post');
-            if (posts.length) {
-                [].forEach.call(posts, function (post) {
-                    $result[0].appendChild(post);
-                });
-            }
-        }).fail(function (xhr) {
-            // 404 indicates we've run out of pages
-            if (xhr.status === 404) {
-                window.removeEventListener('scroll', onScroll, {passive: true});
-                window.removeEventListener('resize', onResize);
-            }
-        }).always(function () {
-            lastDocumentHeight = $document.height();
-            isLoading = false;
-            ticking = false;
-        });
-    }
-
-    window.addEventListener('scroll', onScroll, {passive: true});
+    window.addEventListener('scroll', onScroll, { passive: true });
     window.addEventListener('resize', onResize);
 
-    infiniteScroll();
-});
+    requestTick();
+})(window, document);

author.hbs

@@ -3,7 +3,9 @@
 
 {{#author}}
 {{!-- Everything inside the #author tags pulls data from the author --}}
-<header class="site-header outer {{#if cover_image}}" style="background-image: url({{cover_image}}){{else}}no-cover{{/if}}">
+
+
+{{> header background=feature_image}} {{!--Special header.hbs partial to generate the <header> tag--}}
     <div class="inner">
         {{> "site-nav"}}
         <div class="site-header-content">

default.hbs

@@ -28,11 +28,11 @@
         {{!-- The footer at the very bottom of the screen --}}
         <footer class="site-footer outer">
             <div class="site-footer-content inner">
-                <section class="copyright"><a href="{{@blog.url}}">{{@blog.title}}</a> &copy; {{date format="YYYY"}}</section>
+                <section class="copyright"><a href="{{@site.url}}">{{@site.title}}</a> &copy; {{date format="YYYY"}}</section>
                 <nav class="site-footer-nav">
-                    <a href="{{@blog.url}}">Latest Posts</a>
-                    {{#if @blog.facebook}}<a href="{{facebook_url @blog.facebook}}" target="_blank" rel="noopener">Facebook</a>{{/if}}
-                    {{#if @blog.twitter}}<a href="{{twitter_url @blog.twitter}}" target="_blank" rel="noopener">Twitter</a>{{/if}}
+                    <a href="{{@site.url}}">Latest Posts</a>
+                    {{#if @site.facebook}}<a href="{{facebook_url @site.facebook}}" target="_blank" rel="noopener">Facebook</a>{{/if}}
+                    {{#if @site.twitter}}<a href="{{twitter_url @site.twitter}}" target="_blank" rel="noopener">Twitter</a>{{/if}}
                     <a href="https://ghost.org" target="_blank" rel="noopener">Ghost</a>
                 </nav>
             </div>
@@ -45,10 +45,10 @@
     <div id="subscribe" class="subscribe-overlay">
         <a class="subscribe-overlay-close" href="#"></a>
         <div class="subscribe-overlay-content">
-            {{#if @blog.logo}}
-                <img class="subscribe-overlay-logo" src="{{@blog.logo}}" alt="{{@blog.title}}" />
+            {{#if @site.logo}}
+                <img class="subscribe-overlay-logo" src="{{@site.logo}}" alt="{{@site.title}}" />
             {{/if}}
-            <h1 class="subscribe-overlay-title">Subscribe to {{@blog.title}}</h1>
+            <h1 class="subscribe-overlay-title">Subscribe to {{@site.title}}</h1>
             <p class="subscribe-overlay-description">Stay up to date! Get all the latest &amp; greatest posts delivered straight to your inbox</p>
             {{subscribe_form placeholder="youremail@example.com"}}
         </div>
@@ -76,12 +76,6 @@
     <script type="text/javascript" src="{{asset "built/jquery.fitvids.js"}}"></script>
 
     {{#if pagination.pages}}
-    <script>
-        // maxPages is a global variable that is needed to determine
-        // if we need to load more pages for the infinitescroll, or if
-        // we reached the last page already.
-        var maxPages = parseInt('{{pagination.pages}}');
-    </script>
     <script src="{{asset "built/infinitescroll.js"}}"></script>
     {{/if}}
 

error-404.hbs

@@ -16,13 +16,13 @@ It's a good idea to keep this template as minimal as possible in terms of both f
 <body class="error-template">
     <div class="site-wrapper">
 
-        <header class="site-header outer {{#if feature_image}}" style="background-image: url({{feature_image}}){{else}}no-cover{{/if}}">
+        <header class="site-header outer {{#if feature_image}}" style="background-image: url({{feature_image}}){{else}}no-image{{/if}}">
             <div class="inner">
                 <nav class="site-nav-center">
-                    {{#if @blog.logo}}
-                        <a class="site-nav-logo" href="{{@blog.url}}"><img src="{{@blog.logo}}" alt="{{@blog.title}}" /></a>
+                    {{#if @site.logo}}
+                        <a class="site-nav-logo" href="{{@site.url}}"><img src="{{img_url @site.logo size="xs"}}" alt="{{@site.title}}" /></a>
                     {{else}}
-                        <a class="site-nav-logo" href="{{@blog.url}}">{{@blog.title}}</a>
+                        <a class="site-nav-logo" href="{{@site.url}}">{{@site.title}}</a>
                     {{/if}}
                 </nav>
             </div>
@@ -34,7 +34,7 @@ It's a good idea to keep this template as minimal as possible in terms of both f
                 <section class="error-message">
                     <h1 class="error-code">{{code}}</h1>
                     <p class="error-description">{{message}}</p>
-                    <a class="error-link" href="{{@blog.url}}">Go to the front page →</a>
+                    <a class="error-link" href="{{@site.url}}">Go to the front page →</a>
                 </section>
             </div>
         </main>

error.hbs

@@ -17,13 +17,13 @@ You'll notice that we *don't* use any JavsScript, or ghost_head / ghost_foot in
 <body class="error-template">
     <div class="site-wrapper">
 
-        <header class="site-header outer {{#if feature_image}}" style="background-image: url({{feature_image}}){{else}}no-cover{{/if}}">
+        <header class="site-header outer {{#if feature_image}}" style="background-image: url({{feature_image}}){{else}}no-image{{/if}}">
             <div class="inner">
                 <nav class="site-nav-center">
-                    {{#if @blog.logo}}
-                        <a class="site-nav-logo" href="{{@blog.url}}"><img src="{{@blog.logo}}" alt="{{@blog.title}}" /></a>
+                    {{#if @site.logo}}
+                        <a class="site-nav-logo" href="{{@site.url}}"><img src="{{img_url @site.logo size="xs"}}" alt="{{@site.title}}" /></a>
                     {{else}}
-                        <a class="site-nav-logo" href="{{@blog.url}}">{{@blog.title}}</a>
+                        <a class="site-nav-logo" href="{{@site.url}}">{{@site.title}}</a>
                     {{/if}}
                 </nav>
             </div>
@@ -35,7 +35,7 @@ You'll notice that we *don't* use any JavsScript, or ghost_head / ghost_foot in
                 <section class="error-message">
                     <h1 class="error-code">{{code}}</h1>
                     <p class="error-description">{{message}}</p>
-                    <a class="error-link" href="{{@blog.url}}">Go to the front page →</a>
+                    <a class="error-link" href="{{@site.url}}">Go to the front page →</a>
                 </section>
 
                 {{#if errorDetails}}

index.hbs

@@ -2,18 +2,17 @@
 {{!-- The tag above means: insert everything in this file
 into the {body} of the default.hbs template --}}
 
-{{!-- The big featured header, it uses blog cover image as a BG if available --}}
-<header class="site-header outer {{#if @blog.cover_image}}" style="background-image: url({{@blog.cover_image}}){{else}}no-cover{{/if}}">
+{{> header background=@site.cover_image}} {{!--Special header.hbs partial to generate the <header> tag--}}
     <div class="inner">
         <div class="site-header-content">
             <h1 class="site-title">
-                {{#if @blog.logo}}
-                    <img class="site-logo" src="{{@blog.logo}}" alt="{{@blog.title}}" />
+                {{#if @site.logo}}
+                    <img class="site-logo" src="{{img_url @site.logo size="s"}}" alt="{{@site.title}}" />
                 {{else}}
-                    {{@blog.title}}
+                    {{@site.title}}
                 {{/if}}
             </h1>
-            <h2 class="site-description">{{@blog.description}}</h2>
+            <h2 class="site-description">{{@site.description}}</h2>
         </div>
         {{> "site-nav"}}
     </div>

package.json

@@ -2,9 +2,10 @@
     "name": "casper",
     "description": "The default personal blogging theme for Ghost. Beautiful, minimal and responsive.",
     "demo": "https://demo.ghost.io",
-    "version": "2.7.0",
+    "version": "2.9.0",
     "engines": {
-        "ghost": ">=2.0.0"
+        "ghost": ">=2.0.0",
+        "ghost-api": "v2"
     },
     "license": "MIT",
     "screenshots": {
@@ -57,6 +58,26 @@
         "gulp-uglify": "3.0.1"
     },
     "config": {
-        "posts_per_page": 25
+        "posts_per_page": 25,
+        "image_sizes": {
+            "xxs": {
+                "width": 30
+            },
+            "xs": {
+                "width": 100
+            },
+            "s": {
+                "width": 300
+            },
+            "m": {
+                "width": 600
+            },
+            "l": {
+                "width": 1000
+            },
+            "xl": {
+                "width": 2000
+            }
+        }
     }
 }

page.hbs

@@ -22,7 +22,20 @@ into the {body} of the default.hbs template --}}
             </header>
 
             {{#if feature_image}}
-            <figure class="post-full-image" style="background-image: url({{feature_image}})">
+            <figure class="post-full-image">
+                {{!-- This is a responsive image, it loads different sizes depending on device
+                https://medium.freecodecamp.org/a-guide-to-responsive-images-with-ready-to-use-templates-c400bd65c433 --}}
+                <img
+                    srcset="{{img_url feature_image size="s"}} 300w,
+                            {{img_url feature_image size="m"}} 600w,
+                            {{img_url feature_image size="l"}} 1000w,
+                            {{img_url feature_image size="xl"}} 2000w"
+                    sizes="(max-width: 800px) 400px,
+                            (max-width: 1170px) 700px,
+                            1400px"
+                    src="{{img_url feature_image size="xl"}}"
+                    alt="{{title}}"
+                />
             </figure>
             {{/if}}
 

partials/byline-multiple.hbs

@@ -12,7 +12,7 @@
             <div class="author-card">
                 <div class="basic-info">
                     {{#if profile_image}}
-                        <img class="author-profile-image" src="{{profile_image}}" alt="{{name}}" />
+                        <img class="author-profile-image" src="{{img_url profile_image size="xs"}}" alt="{{name}}" />
                     {{else}}
                         <div class="author-profile-image">{{> "icons/avatar"}}</div>
                     {{/if}}
@@ -29,7 +29,9 @@
             </div>
 
             {{#if profile_image}}
-                <a href="{{url}}" class="moving-avatar"><img class="author-profile-image" src="{{profile_image}}" alt="{{name}}" /></a>
+                <a href="{{url}}" class="moving-avatar">
+                    <img class="author-profile-image" src="{{img_url profile_image size="xs"}}" alt="{{name}}" />
+                </a>
             {{else}}
                 <a href="{{url}}" class="moving-avatar author-profile-image">{{> "icons/avatar"}}</a>
             {{/if}}

partials/byline-single.hbs

@@ -3,7 +3,7 @@
 
 <section class="author-card">
     {{#if profile_image}}
-        <img class="author-profile-image" src="{{profile_image}}" alt="{{name}}" />
+        <img class="author-profile-image" src="{{img_url profile_image size="xs"}}" alt="{{name}}" />
     {{else}}
         <span class="avatar-wrapper">{{> "icons/avatar"}}</span>
     {{/if}}

partials/floating-header.hbs

@@ -1,10 +1,10 @@
 <div class="floating-header">
     <div class="floating-header-logo">
-        <a href="{{@blog.url}}">
-            {{#if @blog.icon}}
-                <img src="{{@blog.icon}}" alt="{{@blog.title}} icon" />
+        <a href="{{@site.url}}">
+            {{#if @site.icon}}
+                <img src="{{img_url @site.icon size="xxs"}}" alt="{{@site.title}} icon" />
             {{/if}}
-            <span>{{@blog.title}}</span>
+            <span>{{@site.title}}</span>
         </a>
     </div>
     <span class="floating-header-divider">&mdash;</span>

partials/header.hbs

@@ -0,0 +1,51 @@
+{{!--
+Wow what the hell is going on in here even?
+
+Ok so, several templates use this big header with a giant BG image. Nice idea, but big images
+have a heavy impact on performance, so it's a good idea to make them responsive. Because we
+can only get the image dynamically using Handlebars, and we can only set the image to properly
+be a background image using CSS, we end up with a handful of inline styles.
+
+If the template in question has a background image, then we render responsive image styles
+for it, and apply those styles to the <header> tag. Else, we just output a <header> tag
+with a `no-image` class so we can style it accordingly.
+--}}
+
+{{#if background}}
+
+<style type="text/css">
+.responsive-header-img {
+    background-image: url({{img_url background size='xl'}});
+}
+@media(max-width: 1000px) {
+.responsive-header-img {
+    background-image: url({{img_url background size='l'}});
+    background-image: -webkit-image-set(
+        url({{img_url background size='l'}}) 1x,
+        url({{img_url background size='xl'}}) 2x
+    );
+    background-image: image-set(
+        url({{img_url background size='l'}}) 1x,
+        url({{img_url background size='xl'}}) 2x
+    );
+}
+@media(max-width: 600px) {
+.responsive-header-img {
+    background-image: url({{img_url background size='m'}});
+    background-image: -webkit-image-set(
+        url({{img_url background size='m'}}) 1x,
+        url({{img_url background size='l'}}) 2x
+    );
+    background-image: image-set(
+        url({{img_url background size='m'}}) 1x,
+        url({{img_url background size='l'}}) 2x
+    );
+}
+</style>
+<header class="site-header outer responsive-header-img">
+
+{{else}}
+
+<header class="site-header outer no-image">
+
+{{/if}}

partials/post-card.hbs

@@ -1,21 +1,38 @@
-<article class="post-card {{post_class}}{{#unless feature_image}} no-image{{/unless}}">
+<article class="post-card {{post_class}} {{#unless feature_image}}no-image{{else}}{{#is "home"}}{{#has index="nth:6"}}post-card-large{{/has}}{{/is}}{{/unless}}">
+
     {{#if feature_image}}
-        <a class="post-card-image-link" href="{{url}}">
-            <div class="post-card-image" style="background-image: url({{feature_image}})"></div>
-        </a>
+    <a class="post-card-image-link" href="{{url}}">
+        {{!-- This is a responsive image, it loads different sizes depending on device
+        https://medium.freecodecamp.org/a-guide-to-responsive-images-with-ready-to-use-templates-c400bd65c433 --}}
+        <img class="post-card-image"
+            srcset="{{img_url feature_image size="s"}} 300w,
+                    {{img_url feature_image size="m"}} 600w,
+                    {{img_url feature_image size="l"}} 1000w,
+                    {{img_url feature_image size="xl"}} 2000w"
+            sizes="(max-width: 1000px) 400px, 700px"
+            src="{{img_url feature_image size="m"}}"
+            alt="{{title}}"
+        />
+    </a>
     {{/if}}
+
     <div class="post-card-content">
+
         <a class="post-card-content-link" href="{{url}}">
+
             <header class="post-card-header">
                 {{#if primary_tag}}
                     <span class="post-card-tags">{{primary_tag.name}}</span>
                 {{/if}}
                 <h2 class="post-card-title">{{title}}</h2>
             </header>
+
             <section class="post-card-excerpt">
                 <p>{{excerpt words="33"}}</p>
             </section>
+
         </a>
+
         <footer class="post-card-meta">
 
             <ul class="author-list">
@@ -27,7 +44,9 @@
                     </div>
 
                     {{#if profile_image}}
-                        <a href="{{url}}" class="static-avatar"><img class="author-profile-image" src="{{profile_image}}" alt="{{name}}" /></a>
+                        <a href="{{url}}" class="static-avatar">
+                            <img class="author-profile-image" src="{{img_url profile_image size="xs"}}" alt="{{name}}" />
+                        </a>
                     {{else}}
                         <a href="{{url}}" class="static-avatar author-profile-image">{{> "icons/avatar"}}</a>
                     {{/if}}
@@ -38,5 +57,7 @@
             <span class="reading-time">{{reading_time}}</span>
 
         </footer>
-    </div>
+
+    </div>{{!--/.post-card-content--}}
+
 </article>

partials/site-nav.hbs

@@ -1,29 +1,29 @@
 <nav class="site-nav">
     <div class="site-nav-left">
         {{^is "home"}}
-            {{#if @blog.logo}}
-                <a class="site-nav-logo" href="{{@blog.url}}"><img src="{{@blog.logo}}" alt="{{@blog.title}}" /></a>
+            {{#if @site.logo}}
+                <a class="site-nav-logo" href="{{@site.url}}"><img src="{{@site.logo}}" alt="{{@site.title}}" /></a>
             {{else}}
-                <a class="site-nav-logo" href="{{@blog.url}}">{{@blog.title}}</a>
+                <a class="site-nav-logo" href="{{@site.url}}">{{@site.title}}</a>
             {{/if}}
         {{/is}}
-        {{#if @blog.navigation}}
+        {{#if @site.navigation}}
             {{navigation}}
         {{/if}}
     </div>
     <div class="site-nav-right">
         <div class="social-links">
-            {{#if @blog.facebook}}
-                <a class="social-link social-link-fb" href="{{facebook_url @blog.facebook}}" title="Facebook" target="_blank" rel="noopener">{{> "icons/facebook"}}</a>
+            {{#if @site.facebook}}
+                <a class="social-link social-link-fb" href="{{facebook_url @site.facebook}}" title="Facebook" target="_blank" rel="noopener">{{> "icons/facebook"}}</a>
             {{/if}}
-            {{#if @blog.twitter}}
-                <a class="social-link social-link-tw" href="{{twitter_url @blog.twitter}}" title="Twitter" target="_blank" rel="noopener">{{> "icons/twitter"}}</a>
+            {{#if @site.twitter}}
+                <a class="social-link social-link-tw" href="{{twitter_url @site.twitter}}" title="Twitter" target="_blank" rel="noopener">{{> "icons/twitter"}}</a>
             {{/if}}
         </div>
         {{#if @labs.subscribers}}
             <a class="subscribe-button" href="#subscribe">Subscribe</a>
         {{else}}
-            <a class="rss-button" href="https://feedly.com/i/subscription/feed/{{@blog.url}}/rss/" title="RSS" target="_blank" rel="noopener">{{> "icons/rss"}}</a>
+            <a class="rss-button" href="https://feedly.com/i/subscription/feed/{{@site.url}}/rss/" title="RSS" target="_blank" rel="noopener">{{> "icons/rss"}}</a>
         {{/if}}
     </div>
 </nav>

post.hbs

@@ -28,7 +28,20 @@ into the {body} of the default.hbs template --}}
             </header>
 
             {{#if feature_image}}
-            <figure class="post-full-image" style="background-image: url({{feature_image}})">
+            <figure class="post-full-image">
+                {{!-- This is a responsive image, it loads different sizes depending on device
+                https://medium.freecodecamp.org/a-guide-to-responsive-images-with-ready-to-use-templates-c400bd65c433 --}}
+                <img
+                    srcset="{{img_url feature_image size="s"}} 300w,
+                            {{img_url feature_image size="m"}} 600w,
+                            {{img_url feature_image size="l"}} 1000w,
+                            {{img_url feature_image size="xl"}} 2000w"
+                    sizes="(max-width: 800px) 400px,
+                            (max-width: 1170px) 700px,
+                            1400px"
+                    src="{{img_url feature_image size="xl"}}"
+                    alt="{{title}}"
+                />
             </figure>
             {{/if}}
 
@@ -41,7 +54,7 @@ into the {body} of the default.hbs template --}}
             {{!-- Email subscribe form at the bottom of the page --}}
             {{#if @labs.subscribers}}
             <section class="subscribe-form">
-                <h3 class="subscribe-form-title">Subscribe to {{@blog.title}}</h3>
+                <h3 class="subscribe-form-title">Subscribe to {{@site.title}}</h3>
                 <p>Get the latest posts delivered right to your inbox</p>
                 {{subscribe_form placeholder="youremail@example.com"}}
             </section>
@@ -82,14 +95,14 @@ into the {body} of the default.hbs template --}}
                 {{#if related_posts}}
                 <article class="read-next-card"
                     {{#if ../primary_tag.feature_image}}
-                        style="background-image: url({{../primary_tag.feature_image}})"
+                        style="background-image: url({{img_url ../primary_tag.feature_image size="m"}})"
                     {{else}}
-                        {{#if @blog.cover_image}}
-                            style="background-image: url({{@blog.cover_image}})"{{/if}}
+                        {{#if @site.cover_image}}
+                            style="background-image: url({{img_url @site.cover_image size="m"}})"{{/if}}
                     {{/if}}
                 >
                     <header class="read-next-card-header">
-                        <small class="read-next-card-header-sitetitle">&mdash; {{@blog.title}} &mdash;</small>
+                        <small class="read-next-card-header-sitetitle">&mdash; {{@site.title}} &mdash;</small>
                         {{#../primary_tag}}
                         <h3 class="read-next-card-header-title"><a href="{{url}}">{{name}}</a></h3>
                         {{/../primary_tag}}

tag.hbs

@@ -1,9 +1,8 @@
 {{!< default}}
 {{!-- The tag above means - insert everything in this file into the {body} of the default.hbs template --}}
 
-{{!-- The big featured header, it uses blog cover image as a BG if available --}}
 {{#tag}}
-<header class="site-header outer {{#if feature_image}}" style="background-image: url({{feature_image}}){{else}}no-cover{{/if}}">
+{{> header background=feature_image}} {{!--Special header.hbs partial to generate the <header> tag--}}
     <div class="inner">
         {{> "site-nav"}}
         <div class="site-header-content">