Add blazy

docs/_sass/expo.sass

@@ -33,20 +33,17 @@
   .expo
     padding-bottom: 3rem
     padding-top: 3rem
-  .website
-    margin-top: 3rem
-    &:nth-child(1),
-    &:nth-child(2)
-      margin-top: 0
-  .website-image
-    margin-bottom: 3rem
-
-+widescreen
   .websites
     display: flex
     flex-wrap: wrap
     justify-content: space-between
   .website
+    margin-top: 3rem
     width: calc(50% - 3rem)
+    &:nth-child(1),
+    &:nth-child(2)
+      margin-top: 0
     &.is-highlighted
-      width: 100%
+      width: 100%
+  .website-image
+    margin-bottom: 3rem

docs/expo.html

@@ -100,13 +100,33 @@ websites:
 
     <div class="websites">
       {% for website in page.websites %}
+        {% assign imageName = website.name | slugify %}
+        {% assign imagePath = "/images/expo/" | prepend: site.url | append: imageName %}
         <article class="website {% if website.highlighted %}is-highlighted{% endif %}">
           <a class="website-image" href="{{ website.url }}" target="_blank">
-            <img
-              src="{{ site.url }}/images/expo/{{ website.name | slugify }}.jpg"
-              srcset="{{ site.url }}/images/expo/{{ website.name | slugify }}@2x.jpg 2x"
-              width="1344"
-              height="840">
+            {% if website.highlighted %}
+              {% assign size1x = "1344x840" %}
+              {% assign size2x = "2688x1680" %}
+              <img
+                class="b-lazy"
+                src="{{ site.url }}/images/placeholders/empty.png"
+                data-src="{{ imagePath }}-{{ size1x }}.jpg"
+                data-srcset="{{ imagePath }}-{{ size2x }}.jpg 2x,
+                             {{ imagePath }}-{{ size1x }}.jpg 1x"
+                width="1344"
+                height="840">
+            {% else %}
+              {% assign size1x = "672x420" %}
+              {% assign size2x = "1344x840" %}
+              <img
+                class="b-lazy"
+                src="{{ site.url }}/images/placeholders/empty.png"
+                data-src="{{ imagePath }}-{{ size1x }}.jpg"
+                data-srcset="{{ imagePath }}-{{ size2x }}.jpg 2x,
+                             {{ imagePath }}-{{ size1x }}.jpg 1x"
+                width="672"
+                height="420">
+            {% endif %}
             <span class="website-overlay is-overlay"></span>
           </a>
           <h2 class="title is-5 website-name is-marginless">
@@ -121,4 +141,11 @@ websites:
 
     {{ embrace_expo }}
   </div>
-</main>
+</main>
+
+<script src="{{ site.url }}/vendor/blazy-1.8.2.min.js"></script>
+<script type="text/javascript">
+  ;(function() {
+    var bLazy = new Blazy();
+  })();
+</script>