footer: change scroll behaviour as it was before 80954de

fixes #151

anchored-headings: retain anchor link '#' in URL
cc #108

footer: remove '#' with go-to-top

Revert "anchored-headings: retain anchor link '#' in URL"
This reverts commit 80954de8bd.

Revert "footer: rm unused code"
This reverts commit c76233b350.

assets/css/reset.css

@@ -5,14 +5,7 @@
 }
 
 html {
-    -webkit-tap-highlight-color: transparent;
-    scroll-behavior: smooth
-}
-
-@media screen and (prefers-reduced-motion: reduce) {
-    html {
-        scroll-behavior: auto
-    }
+    -webkit-tap-highlight-color: transparent
 }
 
 a,

layouts/_default/baseof.html

@@ -12,7 +12,7 @@
 {{- if eq $.Site.Params.defaultTheme `dark` -}}
 {{- print " dark" }}
 {{- end -}}
-">
+" id="top">
     {{- partialCached "header.html" . .Page}}
     <main class="main">
         {{- block "main" . }}

layouts/partials/footer.html

@@ -9,10 +9,14 @@
     <span>&middot;</span>
     <span>Theme <a href="https://git.io/hugopapermod" rel="noopener" target="_blank">PaperMod</a></span>
 </footer>
-<button class="top-link" id="top-link" type="button" aria-label="go to top" title="Go to Top (Alt + G)" accesskey="g">
-    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 12 6">
-        <path d="M12 6H0l6-6z" /></svg>
-</button>
+<a href="#top">
+    <button class="top-link" id="top-link" type="button" aria-label="go to top" title="Go to Top (Alt + G)"
+        accesskey="g">
+        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 12 6">
+            <path d="M12 6H0l6-6z" />
+        </svg>
+    </button>
+</a>
 {{- partial "extend_footer.html" . -}}
 {{ if (and (in site.Params.mainSections .Type) (ne .Layout `archives`) (ne .Layout `search`)) }}
 {{- if not .Site.Params.assets.disableFingerprinting }}
@@ -30,6 +34,20 @@
             document.getElementById('menu').scrollLeft = localStorage.getItem("menu-scroll-position");
         }
     }
+    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
+        anchor.addEventListener("click", function (e) {
+            e.preventDefault();
+            var id = this.getAttribute("href").substr(1);
+            document.querySelector(`[id='${decodeURIComponent(id)}']`).scrollIntoView({
+                behavior: "smooth"
+            });
+            if (id === "top") {
+                history.replaceState(null, null, " ");
+            } else {
+                history.replaceState(null, null, `#${id}`);
+            }
+        });
+    });
     var mybutton = document.getElementById("top-link");
     window.onscroll = function () {
         if (document.body.scrollTop > 800 || document.documentElement.scrollTop > 800) {
@@ -40,11 +58,6 @@
             mybutton.style.opacity = "0";
         }
     };
-    mybutton.onclick = function () {
-        document.body.scrollTop = 0;
-        document.documentElement.scrollTop = 0;
-        window.location.hash = ''
-    }
 
     function menu_on_scroll() {
         localStorage.setItem("menu-scroll-position", document.getElementById('menu').scrollLeft);