Chanding how cache button is drawn/hidden

theme/basic.css

@@ -133,3 +133,7 @@ li[draggable] {
 [draggable].over {
   border: 1px white dashed;
 }
+
+#cacheButton.disabled {
+  display: none;
+}

theme/index.html

@@ -27,6 +27,7 @@
       <ul>
         <li><a href="scoreboard.html">Scoreboard</a></li>
         <li><a href="logout.html">Sign Out</a></li>
+	<li id="cacheButton" class="disabled"><a href="#" onclick='fetchAll()' title="Cache am offline copy of current content">Cache</a></li>
       </ul>
     </nav>
   </body>

theme/moth.js

@@ -111,18 +111,7 @@ function showPuzzles(teamId) {
 }
 
 function drawCacheButton(teamId) {
-  let cacher = document.createElement("li")
-  let cache_button = document.createElement("a")
-  cache_button.innerText = "Cache"
-  cache_button.title = "Cache an offine copy of current content"
-  cache_button.href = "#"
-  cache_button.addEventListener("click", async function() {
-    toast("Caching all currently-open content")
-    await fetchAll(teamId)
-    toast("Done caching content")
-  })
-  cacher.appendChild(cache_button)
-  document.getElementsByTagName("nav")[0].getElementsByTagName("ul")[0].appendChild(cacher)
+  let cacher = document.querySelector("#cacheButton")
 
   function updateCacheButton() {
     let headers = new Headers()
@@ -133,13 +122,13 @@ function drawCacheButton(teamId) {
     fetch(url, {method: "HEAD", headers: headers})
       .then( resp => {
         if (resp.ok) {
-          cacher.style.disply = "initial"
+	  cacher.classList.remove("disabled")
         } else {
-          cacher.style.display = "none"
+	  cacher.classList.add("disabled")
         }
       })
       .catch(ex => {
-          cacher.style.display = "none"
+	  cacher.classList.add("disabled")
       })
   }
 
@@ -147,7 +136,8 @@ function drawCacheButton(teamId) {
   updateCacheButton()
 }
 
-async function fetchAll(teamId) {
+async function fetchAll() {
+  let teamId = sessionStorage.getItem("id")
   let headers = new Headers()
   headers.append("pragma", "no-cache")
   headers.append("cache-control", "no-cache")
@@ -155,6 +145,7 @@ async function fetchAll(teamId) {
   let url = new URL("current_manifest.json", window.location)
   url.searchParams.set("id", teamId)
 
+  toast("Caching all currently-open content")
   requests.push( fetch(url, {headers: headers})
    .then( resp => {
     if (resp.ok) {
@@ -198,7 +189,8 @@ async function fetchAll(teamId) {
       }
     }
   }
-  return Promise.all(requests)
+  await Promise.all(requests)
+  toast("Done caching content")
 }
 
 function login(e) {