adding button to scroll to top

Signed-off-by: Vanessa Sochat <[email protected]>

Author: vsoch

_config.yml

@@ -42,6 +42,7 @@ dockerhub: vanessa
 # logo: "assets/img/logo/SRCC-square-white.png"
 logo: "assets/img/logo/SRCC-square-red.png"
 logo_pixels: 34
+color: "#8c1515" # primary color for header, buttons
 
 # Build settings
 markdown: kramdown

_includes/scrolltop.html

@@ -0,0 +1,42 @@
+<style>
+#scrolltop {
+  display: none; /* Hidden by default */
+  position: fixed; /* Fixed/sticky position */
+  bottom: 20px; /* Place the button at the bottom of the page */
+  right: 30px; /* Place the button 30px from the right */
+  z-index: 99; /* Make sure it does not overlap */
+  border: none; /* Remove borders */
+  outline: none; /* Remove outline */
+  background-color: {{ site.color }}; /* Set a background color */
+  color: white; /* Text color */
+  cursor: pointer; /* Add a mouse pointer on hover */
+  padding: 10px 15px; /* Some padding */
+  border-radius: 100px; /* Rounded corners */
+  font-size: 18px; /* Increase font size */
+  font-weight: 600;
+}
+
+#scrolltop:hover {
+  background-color: #555; /* Add a dark-grey background on hover */
+}
+</style>
+<button onclick="topFunction()" id="scrolltop" title="Go to top">^</button>
+
+<script>
+// When the user scrolls down 20px from the top of the document, show the button
+window.onscroll = function() {scrollFunction()};
+
+function scrollFunction() {
+  if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
+    document.getElementById("scrolltop").style.display = "block";
+  } else {
+    document.getElementById("scrolltop").style.display = "none";
+  }
+}
+
+// When the user clicks on the button, scroll to the top of the document
+function topFunction() {
+  document.body.scrollTop = 0; // For Safari
+  document.documentElement.scrollTop = 0; // For Chrome, Firefox, IE and Opera
+}
+</script>

_layouts/default.html

@@ -16,5 +16,6 @@
         </main>
     </div>
     {% include footer.html %}
+    {% include scrolltop.html %}
   </body>
 </html>

assets/css/palette.css

@@ -1,3 +1,7 @@
+---
+layout: null
+excluded_in_search: true
+---
 button[data-md-color-accent], button[data-md-color-primary] {
     width: 13rem;
     margin-bottom: .4rem;
@@ -13,16 +17,16 @@ button[data-md-color-accent]:hover, button[data-md-color-primary]:hover {
     opacity: .75;
 }
 button[data-md-color-primary=red] {
-    background-color: #8c1515;
+    background-color: {{ site.color }};
 }
 [data-md-color-primary=red] .md-typeset a {
-    color: #8c1515;
+    color: {{ site.color }};
 }
 [data-md-color-primary=red] .md-header, [data-md-color-primary=red] .md-hero {
-    background-color: #8c1515;
+    background-color: {{ site.color }};
 }
 [data-md-color-primary=red] .md-nav__link--active, [data-md-color-primary=red] .md-nav__link:active {
-    color: #8c1515;
+    color: {{ site.color }};
 }
 [data-md-color-primary=red] .md-nav__item--nested>.md-nav__link {
     color: inherit;
@@ -756,7 +760,7 @@ button[data-md-color-accent=deep-orange] {
 }
 @media only screen and (max-width:76.1875em) {
     html [data-md-color-primary=red] .md-nav--primary .md-nav__title--site {
-    background-color: #8c1515;
+    background-color: {{ site.color }};
 }
 html [data-md-color-primary=pink] .md-nav--primary .md-nav__title--site {
     background-color: #e91e63;
@@ -822,7 +826,7 @@ html [data-md-color-primary=white] .md-nav--primary .md-nav__title--site {
 }
 @media only screen and (min-width:76.25em) {
     [data-md-color-primary=red] .md-tabs {
-    background-color: #8c1515;
+    background-color: {{ site.color }};
 }
 [data-md-color-primary=pink] .md-tabs {
     background-color: #e91e63;