Adding thumbnails to further improve load times and provide blurred placeholders

index.pug

@@ -78,11 +78,10 @@ html(lang="en")
             .row
               .wide.column
                 #image_container
+                  img.phone(src="assets/images/phone@400.png" sizes="(max-height: 800px) calc(50vw + 101px), (max-width: 800px) calc(50vw + 101px), calc(33vw + 1px)" srcset="assets/images/phone@220.png 220w, assets/images/phone@300.png 300w, assets/images/phone@400.png 400w, assets/images/phone@520.png 520w, assets/images/phone@640.png 640w, assets/images/phone@800.png 800w, assets/images/phone@1000.png 1000w, assets/images/phone@1220.png 1220w")
                   noscript
-                    img.phone(src="assets/images/phone@400.png" sizes="(max-height: 800px) calc(50vw + 101px), (max-width: 800px) calc(50vw + 101px), calc(33vw + 1px)" srcset="assets/images/phone@220.png 220w, assets/images/phone@300.png 300w, assets/images/phone@400.png 400w, assets/images/phone@520.png 520w, assets/images/phone@640.png 640w, assets/images/phone@800.png 800w, assets/images/phone@1000.png 1000w, assets/images/phone@1220.png 1220w")
-                    img.tablet(src="assets/images/tablet@1090.png" sizes="calc(33vw + 1px)" srcset="assets/images/tablet@545.png 545w, assets/images/tablet@640.png 640w, assets/images/tablet@720.png 720w, assets/images/tablet@800.png 800w, assets/images/tablet@880.png 880w, assets/images/tablet@960.png 960w, assets/images/tablet@1090.png 1090w, assets/images/tablet@1635.png 1635w, assets/images/tablet@2180.png 2180w")
-                  img.phone(data-src="assets/images/phone@400.png" sizes="(max-height: 800px) calc(50vw + 101px), (max-width: 800px) calc(50vw + 101px), calc(33vw + 1px)" data-srcset="assets/images/phone@220.png 220w, assets/images/phone@300.png 300w, assets/images/phone@400.png 400w, assets/images/phone@520.png 520w, assets/images/phone@640.png 640w, assets/images/phone@800.png 800w, assets/images/phone@1000.png 1000w, assets/images/phone@1220.png 1220w")
-                  img.tablet(data-src="assets/images/tablet@1090.png" sizes="calc(33vw + 1px)" data-srcset="assets/images/tablet@545.png 545w, assets/images/tablet@640.png 640w, assets/images/tablet@720.png 720w, assets/images/tablet@800.png 800w, assets/images/tablet@880.png 880w, assets/images/tablet@960.png 960w, assets/images/tablet@1090.png 1090w, assets/images/tablet@1635.png 1635w, assets/images/tablet@2180.png 2180w")
+                    img.tablet(src="assets/images/tablet@1090.png" sizes="calc(33vw + 1px)" srcset="assets/images/tablet@545.png 545w, assets/images/tablet@640.png 640w, assets/images/tablet@720.png 720w, assets/images/tablet@800.png 800w, assets/images/tablet@880.png 880w, assets/images/tablet@960.png 960w, assets/images/tablet@1090.png 1090w, assets/images/tablet@thumb35.png 1635w, assets/images/tablet@2180.png 2180w")
+                  img.tablet(src="assets/images/tablet@thumb.jpg" data-src="assets/images/tablet@1090.png" sizes="calc(33vw + 1px)" data-srcset="assets/images/tablet@545.png 545w, assets/images/tablet@640.png 640w, assets/images/tablet@720.png 720w, assets/images/tablet@800.png 800w, assets/images/tablet@880.png 880w, assets/images/tablet@960.png 960w, assets/images/tablet@1090.png 1090w, assets/images/tablet@thumb35.png 1635w, assets/images/tablet@2180.png 2180w")
         .ui.vertical.stripe.intro.segment
           .ui.stackable.very.relaxed.center.aligned.grid.container
 
@@ -106,7 +105,7 @@ html(lang="en")
                     .image
                       noscript
                         img(src="assets/images/desktop@590.png" sizes="(max-width: 767px) calc(100vw + 1px), (max-width: 991px) 364px, (max-width: 1199px) 475px, 591px" srcset="assets/images/desktop@363.png 363w, assets/images/desktop@474.png 474w, assets/images/desktop@590.png 590w, assets/images/desktop@726.png 726w, assets/images/desktop@948.png 948w, assets/images/desktop@1180.png 1180w")
-                      img(data-src="assets/images/desktop@590.png" sizes="(max-width: 767px) calc(100vw + 1px), (max-width: 991px) 364px, (max-width: 1199px) 475px, 591px" data-srcset="assets/images/desktop@363.png 363w, assets/images/desktop@474.png 474w, assets/images/desktop@590.png 590w, assets/images/desktop@726.png 726w, assets/images/desktop@948.png 948w, assets/images/desktop@1180.png 1180w")
+                      img(src="assets/images/desktop@thumb.jpg" data-src="assets/images/desktop@590.png" sizes="(max-width: 767px) calc(100vw + 1px), (max-width: 991px) 364px, (max-width: 1199px) 475px, 591px" data-srcset="assets/images/desktop@363.png 363w, assets/images/desktop@474.png 474w, assets/images/desktop@590.png 590w, assets/images/desktop@726.png 726w, assets/images/desktop@948.png 948w, assets/images/desktop@1180.png 1180w")
             .ui.divider
             .computer.reversed.row
               .seven.wide.column.left.aligned
@@ -122,7 +121,7 @@ html(lang="en")
                     .image
                       noscript
                         img(src="assets/images/notifications@590.png" sizes="(max-width: 767px) calc(100vw + 1px), (max-width: 991px) 364px, (max-width: 1199px) 475px, 591px" srcset="assets/images/notifications@363.png 363w, assets/images/notifications@474.png 474w, assets/images/notifications@590.png 590w")
-                      img(data-src="assets/images/notifications@590.png" sizes="(max-width: 767px) calc(100vw + 1px), (max-width: 991px) 364px, (max-width: 1199px) 475px, 591px" data-srcset="assets/images/notifications@363.png 363w, assets/images/notifications@474.png 474w, assets/images/notifications@590.png 590w")
+                      img(src="assets/images/notifications@thumb.jpg" data-src="assets/images/notifications@590.png" sizes="(max-width: 767px) calc(100vw + 1px), (max-width: 991px) 364px, (max-width: 1199px) 475px, 591px" data-srcset="assets/images/notifications@363.png 363w, assets/images/notifications@474.png 474w, assets/images/notifications@590.png 590w")
             .ui.divider
             .row
               .seven.wide.column.left.aligned
@@ -151,7 +150,7 @@ html(lang="en")
                     .image
                       noscript
                         img(src="assets/images/quassel_dark@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" srcset="assets/images/quassel_dark@220.png 220w, assets/images/quassel_dark@266.png 266w, assets/images/quassel_dark@335.png 335w, assets/images/quassel_dark@352.png 352w, assets/images/quassel_dark@532.png 532w")
-                      img(src="assets/images/quassel_dark@16.png" data-src="assets/images/quassel_dark@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/quassel_dark@220.png 220w, assets/images/quassel_dark@266.png 266w, assets/images/quassel_dark@335.png 335w, assets/images/quassel_dark@352.png 352w, assets/images/quassel_dark@532.png 532w")
+                      img(src="assets/images/quassel_dark@thumb.jpg" data-src="assets/images/quassel_dark@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/quassel_dark@220.png 220w, assets/images/quassel_dark@266.png 266w, assets/images/quassel_dark@335.png 335w, assets/images/quassel_dark@352.png 352w, assets/images/quassel_dark@532.png 532w")
                     .content
                       .extra.
                         Quassel Dark
@@ -159,7 +158,7 @@ html(lang="en")
                     .image
                       noscript
                         img(src="assets/images/quassel_light@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" srcset="assets/images/quassel_light@220.png 220w, assets/images/quassel_light@266.png 266w, assets/images/quassel_light@335.png 335w, assets/images/quassel_light@352.png 352w, assets/images/quassel_light@532.png 532w")
-                      img(src="assets/images/quassel_light@16.png" data-src="assets/images/quassel_light@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/quassel_light@220.png 220w, assets/images/quassel_light@266.png 266w, assets/images/quassel_light@335.png 335w, assets/images/quassel_light@352.png 352w, assets/images/quassel_light@532.png 532w")
+                      img(src="assets/images/quassel_light@thumb.jpg" data-src="assets/images/quassel_light@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/quassel_light@220.png 220w, assets/images/quassel_light@266.png 266w, assets/images/quassel_light@335.png 335w, assets/images/quassel_light@352.png 352w, assets/images/quassel_light@532.png 532w")
                     .content
                       .extra.
                         Quassel Light
@@ -167,7 +166,7 @@ html(lang="en")
                     .image
                       noscript
                         img(src="assets/images/solarized_dark@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" srcset="assets/images/solarized_dark@220.png 220w, assets/images/solarized_dark@266.png 266w, assets/images/solarized_dark@335.png 335w, assets/images/solarized_dark@352.png 352w, assets/images/solarized_dark@532.png 532w")
-                      img(src="assets/images/solarized_dark@16.png" data-src="assets/images/solarized_dark@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/solarized_dark@220.png 220w, assets/images/solarized_dark@266.png 266w, assets/images/solarized_dark@335.png 335w, assets/images/solarized_dark@352.png 352w, assets/images/solarized_dark@532.png 532w")
+                      img(src="assets/images/solarized_dark@thumb.jpg" data-src="assets/images/solarized_dark@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/solarized_dark@220.png 220w, assets/images/solarized_dark@266.png 266w, assets/images/solarized_dark@335.png 335w, assets/images/solarized_dark@352.png 352w, assets/images/solarized_dark@532.png 532w")
                     .content
                       .extra.
                         Solarized Dark
@@ -175,7 +174,7 @@ html(lang="en")
                     .image
                       noscript
                         img(src="assets/images/solarized_light@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" srcset="assets/images/solarized_light@220.png 220w, assets/images/solarized_light@266.png 266w, assets/images/solarized_light@335.png 335w, assets/images/solarized_light@352.png 352w, assets/images/solarized_light@532.png 532w")
-                      img(src="assets/images/solarized_light@16.png" data-src="assets/images/solarized_light@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/solarized_light@220.png 220w, assets/images/solarized_light@266.png 266w, assets/images/solarized_light@335.png 335w, assets/images/solarized_light@352.png 352w, assets/images/solarized_light@532.png 532w")
+                      img(src="assets/images/solarized_light@thumb.jpg" data-src="assets/images/solarized_light@266.png" sizes="(max-width: 767px) calc(50vw - 2em + 1px), (max-width: 991px) 336px, (max-width: 1199px) 221px, 267px" data-srcset="assets/images/solarized_light@220.png 220w, assets/images/solarized_light@266.png 266w, assets/images/solarized_light@335.png 335w, assets/images/solarized_light@352.png 352w, assets/images/solarized_light@532.png 532w")
                     .content
                       .extra.
                         Solarized Light