Concatenated all JS into a single file (#624)

no issue

- moved large inline JS from templates into separate JS files
  - floating header
  - gallery card support
- use `gulp-concat` to concatenate all JS files into a single `built/casper.js` file
- reduces external JS file requests from 3 (jquery, infinite-scroll.js, jquery.fitvids.js) down to 2 (jquery, casper.js) and reduces page size by removing repeated inline code

assets/built/casper.js

@@ -0,0 +1,2 @@
+!function(n){"use strict";n.fn.fitVids=function(e){var i={customSelector:null,ignore:null};if(!document.getElementById("fit-vids-style")){var t=document.head||document.getElementsByTagName("head")[0],r=document.createElement("div");r.innerHTML='<p>x</p><style id="fit-vids-style">.fluid-width-video-container{flex-grow: 1;width:100%;}.fluid-width-video-wrapper{width:100%;position:relative;padding:0;}.fluid-width-video-wrapper iframe,.fluid-width-video-wrapper object,.fluid-width-video-wrapper embed {position:absolute;top:0;left:0;width:100%;height:100%;}</style>',t.appendChild(r.childNodes[1])}return e&&n.extend(i,e),this.each(function(){var e=['iframe[src*="player.vimeo.com"]','iframe[src*="youtube.com"]','iframe[src*="youtube-nocookie.com"]','iframe[src*="kickstarter.com"][src*="video.html"]',"object","embed"];i.customSelector&&e.push(i.customSelector);var r=".fitvidsignore";i.ignore&&(r=r+", "+i.ignore);var t=n(this).find(e.join(","));(t=(t=t.not("object object")).not(r)).each(function(){var e=n(this);if(!(0<e.parents(r).length||"embed"===this.tagName.toLowerCase()&&e.parent("object").length||e.parent(".fluid-width-video-wrapper").length)){e.css("height")||e.css("width")||!isNaN(e.attr("height"))&&!isNaN(e.attr("width"))||(e.attr("height",9),e.attr("width",16));var t=("object"===this.tagName.toLowerCase()||e.attr("height")&&!isNaN(parseInt(e.attr("height"),10))?parseInt(e.attr("height"),10):e.height())/(isNaN(parseInt(e.attr("width"),10))?e.width():parseInt(e.attr("width"),10));if(!e.attr("name")){var i="fitvid"+n.fn.fitVids._count;e.attr("name",i),n.fn.fitVids._count++}e.wrap('<div class="fluid-width-video-container"><div class="fluid-width-video-wrapper"></div></div>').parent(".fluid-width-video-wrapper").css("padding-top",100*t+"%"),e.removeAttr("height").removeAttr("width")}})})},n.fn.fitVids._count=0}(window.jQuery||window.Zepto),function(c,i){c.Casper||(c.Casper={}),c.Casper.floatingHeader=function(){var r=i.querySelector("#reading-progress"),n=i.querySelector(".floating-header"),o=i.querySelector(".post-full-title"),a=c.scrollY,s=c.innerHeight,d=i.body.clientHeight,l=!1;function e(){l||requestAnimationFrame(t),l=!0}function t(){var e=o.getBoundingClientRect().top+c.scrollY,t=o.offsetHeight+35,i=d-s;e+t<=a?n.classList.add("floating-active"):n.classList.remove("floating-active"),r.setAttribute("max",i),r.setAttribute("value",a),l=!1}c.addEventListener("scroll",function(){a=c.scrollY,e()},{passive:!0}),c.addEventListener("resize",function(){s=c.innerHeight,d=i.body.clientHeight,e()},!1),t()}}(window,document),function(e,t){t.addEventListener("DOMContentLoaded",function(){t.querySelectorAll(".kg-gallery-image img").forEach(function(e){var t=e.closest(".kg-gallery-image"),i=e.attributes.width.value/e.attributes.height.value;t.style.flex=i+" 1 0%"})})}(window,document),function(t,i){var r=i.querySelector("link[rel=next]");if(r){var n=i.querySelector(".post-feed");if(n){var o=300,a=!1,s=!1,d=t.scrollY,l=t.innerHeight,c=i.documentElement.scrollHeight;t.addEventListener("scroll",f,{passive:!0}),t.addEventListener("resize",v),h()}}function u(){if(404===this.status)return t.removeEventListener("scroll",f),void t.removeEventListener("resize",v);this.response.querySelectorAll(".post-card").forEach(function(e){n.appendChild(e)});var e=this.response.querySelector("link[rel=next]");e?r.href=e.href:(t.removeEventListener("scroll",f),t.removeEventListener("resize",v)),c=i.documentElement.scrollHeight,s=a=!1}function e(){if(!s)if(d+l<=c-o)a=!1;else{s=!0;var e=new t.XMLHttpRequest;e.responseType="document",e.addEventListener("load",u),e.open("GET",r.href),e.send(null)}}function h(){a||t.requestAnimationFrame(e),a=!0}function f(){d=t.scrollY,h()}function v(){l=t.innerHeight,c=i.documentElement.scrollHeight,h()}}(window,document);
+//# sourceMappingURL=casper.js.map

assets/built/infinitescroll.js

@@ -1,2 +0,0 @@
-!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/built/infinitescroll.js.map

@@ -1 +0,0 @@
-{"version":3,"sources":["infinitescroll.js"],"names":["window","document","nextElement","querySelector","feedElement","buffer","ticking","loading","lastScrollY","scrollY","lastWindowHeight","innerHeight","lastDocumentHeight","documentElement","scrollHeight","addEventListener","onScroll","passive","onResize","requestTick","onPageLoad","this","status","removeEventListener","response","querySelectorAll","forEach","item","appendChild","resNextElement","href","onUpdate","xhr","XMLHttpRequest","responseType","open","send","requestAnimationFrame"],"mappings":"CAIA,SAAUA,EAAQC,GAEd,IAAIC,EAAcD,EAASE,cAAc,kBACzC,GAAKD,EAAL,CAGA,IAAIE,EAAcH,EAASE,cAAc,cACzC,GAAKC,EAAL,CAEA,IAAIC,EAAS,IAETC,GAAU,EACVC,GAAU,EAEVC,EAAcR,EAAOS,QACrBC,EAAmBV,EAAOW,YAC1BC,EAAqBX,EAASY,gBAAgBC,aAmElDd,EAAOe,iBAAiB,SAAUC,EAAU,CAAEC,SAAS,IACvDjB,EAAOe,iBAAiB,SAAUG,GAElCC,KApEA,SAASC,IACL,GAAoB,MAAhBC,KAAKC,OAGL,OAFAtB,EAAOuB,oBAAoB,SAAUP,QACrChB,EAAOuB,oBAAoB,SAAUL,GAKtBG,KAAKG,SAASC,iBAAiB,cACrCC,QAAQ,SAAUC,GAC3BvB,EAAYwB,YAAYD,KAI5B,IAAIE,EAAiBR,KAAKG,SAASrB,cAAc,kBAC7C0B,EACA3B,EAAY4B,KAAOD,EAAeC,MAElC9B,EAAOuB,oBAAoB,SAAUP,GACrChB,EAAOuB,oBAAoB,SAAUL,IAIzCN,EAAqBX,EAASY,gBAAgBC,aAE9CP,EADAD,GAAU,EAId,SAASyB,IAEL,IAAIxB,EAGJ,GAAIC,EAAcE,GAAoBE,EAAqBP,EACvDC,GAAU,MADd,CAKAC,GAAU,EAEV,IAAIyB,EAAM,IAAIhC,EAAOiC,eACrBD,EAAIE,aAAe,WAEnBF,EAAIjB,iBAAiB,OAAQK,GAE7BY,EAAIG,KAAK,MAAOjC,EAAY4B,MAC5BE,EAAII,KAAK,OAGb,SAASjB,IACLb,GAAWN,EAAOqC,sBAAsBN,GACxCzB,GAAU,EAGd,SAASU,IACLR,EAAcR,EAAOS,QACrBU,IAGJ,SAASD,IACLR,EAAmBV,EAAOW,YAC1BC,EAAqBX,EAASY,gBAAgBC,aAC9CK,KAhFR,CAuFGnB,OAAQC","file":"infinitescroll.js","sourcesContent":["/**\n * Infinite Scroll\n */\n\n(function(window, document) {\n    // next link element\n    var nextElement = document.querySelector('link[rel=next]');\n    if (!nextElement) return;\n\n    // post feed element\n    var feedElement = document.querySelector('.post-feed');\n    if (!feedElement) return;\n\n    var buffer = 300;\n\n    var ticking = false;\n    var loading = false;\n\n    var lastScrollY = window.scrollY;\n    var lastWindowHeight = window.innerHeight;\n    var lastDocumentHeight = document.documentElement.scrollHeight;\n\n    function onPageLoad() {\n        if (this.status === 404) {\n            window.removeEventListener('scroll', onScroll);\n            window.removeEventListener('resize', onResize);\n            return;\n        }\n\n        // append contents\n        var postElements = this.response.querySelectorAll('.post-card');\n        postElements.forEach(function (item) {\n            feedElement.appendChild(item);\n        });\n\n        // set next link\n        var resNextElement = this.response.querySelector('link[rel=next]');\n        if (resNextElement) {\n            nextElement.href = resNextElement.href;\n        } else {\n            window.removeEventListener('scroll', onScroll);\n            window.removeEventListener('resize', onResize);\n        }\n\n        // sync status\n        lastDocumentHeight = document.documentElement.scrollHeight;\n        ticking = false;\n        loading = false;\n    }\n\n    function onUpdate() {\n        // return if already loading\n        if (loading) return;\n\n        // return if not scroll to the bottom\n        if (lastScrollY + lastWindowHeight <= lastDocumentHeight - buffer) {\n            ticking = false;\n            return;\n        }\n\n        loading = true;\n\n        var xhr = new window.XMLHttpRequest();\n        xhr.responseType = 'document';\n\n        xhr.addEventListener('load', onPageLoad);\n\n        xhr.open('GET', nextElement.href);\n        xhr.send(null);\n    }\n\n    function requestTick() {\n        ticking || window.requestAnimationFrame(onUpdate);\n        ticking = true;\n    }\n\n    function onScroll() {\n        lastScrollY = window.scrollY;\n        requestTick();\n    }\n\n    function onResize() {\n        lastWindowHeight = window.innerHeight;\n        lastDocumentHeight = document.documentElement.scrollHeight;\n        requestTick();\n    }\n\n    window.addEventListener('scroll', onScroll, { passive: true });\n    window.addEventListener('resize', onResize);\n\n    requestTick();\n})(window, document);\n"]}

assets/built/jquery.fitvids.js

@@ -1,2 +0,0 @@
-!function(d){"use strict";d.fn.fitVids=function(t){var i={customSelector:null,ignore:null};if(!document.getElementById("fit-vids-style")){var e=document.head||document.getElementsByTagName("head")[0],r=document.createElement("div");r.innerHTML='<p>x</p><style id="fit-vids-style">.fluid-width-video-container{flex-grow: 1;width:100%;}.fluid-width-video-wrapper{width:100%;position:relative;padding:0;}.fluid-width-video-wrapper iframe,.fluid-width-video-wrapper object,.fluid-width-video-wrapper embed {position:absolute;top:0;left:0;width:100%;height:100%;}</style>',e.appendChild(r.childNodes[1])}return t&&d.extend(i,t),this.each(function(){var t=['iframe[src*="player.vimeo.com"]','iframe[src*="youtube.com"]','iframe[src*="youtube-nocookie.com"]','iframe[src*="kickstarter.com"][src*="video.html"]',"object","embed"];i.customSelector&&t.push(i.customSelector);var r=".fitvidsignore";i.ignore&&(r=r+", "+i.ignore);var e=d(this).find(t.join(","));(e=(e=e.not("object object")).not(r)).each(function(){var t=d(this);if(!(0<t.parents(r).length||"embed"===this.tagName.toLowerCase()&&t.parent("object").length||t.parent(".fluid-width-video-wrapper").length)){t.css("height")||t.css("width")||!isNaN(t.attr("height"))&&!isNaN(t.attr("width"))||(t.attr("height",9),t.attr("width",16));var e=("object"===this.tagName.toLowerCase()||t.attr("height")&&!isNaN(parseInt(t.attr("height"),10))?parseInt(t.attr("height"),10):t.height())/(isNaN(parseInt(t.attr("width"),10))?t.width():parseInt(t.attr("width"),10));if(!t.attr("name")){var i="fitvid"+d.fn.fitVids._count;t.attr("name",i),d.fn.fitVids._count++}t.wrap('<div class="fluid-width-video-container"><div class="fluid-width-video-wrapper"></div></div>').parent(".fluid-width-video-wrapper").css("padding-top",100*e+"%"),t.removeAttr("height").removeAttr("width")}})})},d.fn.fitVids._count=0}(window.jQuery||window.Zepto);
-//# sourceMappingURL=jquery.fitvids.js.map

assets/js/floating-header.js

@@ -0,0 +1,73 @@
+/* eslint-env browser */
+
+/**
+ * Floating header
+ * Used on invividual post pages, displays a sticky header with progress indicator
+ *
+ * This JS is automatically applied for any template where you use the
+ * {{> floating-header}} partial
+ */
+
+(function (window, document) {
+    // set up Casper as a global object
+    if (!window.Casper) {
+        window.Casper = {};
+    }
+
+    window.Casper.floatingHeader = function floatingHeader() {
+        // NOTE: Scroll performance is poor in Safari
+        // - this appears to be due to the events firing much more slowly in Safari.
+        //   Dropping the scroll event and using only a raf loop results in smoother
+        //   scrolling but continuous processing even when not scrolling
+
+        var progressBar = document.querySelector('#reading-progress');
+        var header = document.querySelector('.floating-header');
+        var title = document.querySelector('.post-full-title');
+
+        var lastScrollY = window.scrollY;
+        var lastWindowHeight = window.innerHeight;
+        var lastDocumentHeight = document.body.clientHeight;
+        var ticking = false;
+
+        function onScroll() {
+            lastScrollY = window.scrollY;
+            requestTick();
+        }
+
+        function onResize() {
+            lastWindowHeight = window.innerHeight;
+            lastDocumentHeight = document.body.clientHeight;
+            requestTick();
+        }
+
+        function requestTick() {
+            if (!ticking) {
+                requestAnimationFrame(update);
+            }
+            ticking = true;
+        }
+
+        function update() {
+            var trigger = title.getBoundingClientRect().top + window.scrollY;
+            var triggerOffset = title.offsetHeight + 35;
+            var progressMax = lastDocumentHeight - lastWindowHeight;
+
+            // show/hide floating header
+            if (lastScrollY >= trigger + triggerOffset) {
+                header.classList.add('floating-active');
+            } else {
+                header.classList.remove('floating-active');
+            }
+
+            progressBar.setAttribute('max', progressMax);
+            progressBar.setAttribute('value', lastScrollY);
+
+            ticking = false;
+        }
+
+        window.addEventListener('scroll', onScroll, {passive: true});
+        window.addEventListener('resize', onResize, false);
+
+        update();
+    };
+})(window, document);

assets/js/gallery-card.js

@@ -0,0 +1,24 @@
+/* eslint-env browser */
+
+/**
+ * Gallery card support
+ * Used on any individual post/page
+ *
+ * Detects when a gallery card has been used and applies sizing to make sure
+ * the display matches what is seen in the editor.
+ */
+
+(function (window, document) {
+    var resizeImagesInGalleries = function resizeImagesInGalleries() {
+        var images = document.querySelectorAll('.kg-gallery-image img');
+        images.forEach(function (image) {
+            var container = image.closest('.kg-gallery-image');
+            var width = image.attributes.width.value;
+            var height = image.attributes.height.value;
+            var ratio = width / height;
+            container.style.flex = ratio + ' 1 0%';
+        });
+    };
+
+    document.addEventListener('DOMContentLoaded', resizeImagesInGalleries);
+})(window, document);

assets/js/infinitescroll.js

@@ -1,15 +1,30 @@
+/* eslint-env browser */
+
 /**
  * Infinite Scroll
+ * Used on all pages where there is a list of posts (homepage, tag index, etc).
+ *
+ * When the page is scrolled to 300px from the bottom, the next page of posts
+ * is fetched by following the the <link rel="next" href="..."> that is output
+ * by {{ghost_head}}.
+ *
+ * The individual post items are extracted from the fetched pages by looking for
+ * a wrapper element with the class "post-card". Any found elements are appended
+ * to the element with the class "post-feed" in the currently viewed page.
  */
 
-(function(window, document) {
+(function (window, document) {
     // next link element
     var nextElement = document.querySelector('link[rel=next]');
-    if (!nextElement) return;
+    if (!nextElement) {
+        return;
+    }
 
     // post feed element
     var feedElement = document.querySelector('.post-feed');
-    if (!feedElement) return;
+    if (!feedElement) {
+        return;
+    }
 
     var buffer = 300;
 
@@ -50,7 +65,9 @@
 
     function onUpdate() {
         // return if already loading
-        if (loading) return;
+        if (loading) {
+            return;
+        }
 
         // return if not scroll to the bottom
         if (lastScrollY + lastWindowHeight <= lastDocumentHeight - buffer) {
@@ -85,7 +102,7 @@
         requestTick();
     }
 
-    window.addEventListener('scroll', onScroll, { passive: true });
+    window.addEventListener('scroll', onScroll, {passive: true});
     window.addEventListener('resize', onResize);
 
     requestTick();