Registers service worker on index page

public/js/register-sw.js

@@ -0,0 +1,7 @@
+(function registerSW() {
+  if ("serviceWorker" in navigator) {
+    navigator.serviceWorker.register("/js/sw.js").catch((e) => {
+      console.log("Registration fail: ", e);
+    });
+  }
+})();

public/js/script.js

@@ -1,43 +1,58 @@
+function tz_seconds_to_offset(seconds) {
+  var tz_offset = "";
+  var hours = zero_pad(Math.abs(seconds / 60 / 60));
+  var minutes = zero_pad(Math.floor(seconds / 60) % 60);
+  return (seconds < 0 ? "-" : "+") + hours + ":" + minutes;
+}
 
-  function tz_seconds_to_offset(seconds) {
-    var tz_offset = '';
-    var hours = zero_pad(Math.abs(seconds / 60 / 60));
-    var minutes = zero_pad(Math.floor(seconds / 60) % 60);
-    return (seconds < 0 ? '-' : '+') + hours + ":" + minutes;
-  }
-
-  function zero_pad(num) {
-    num = "" + num;
-    if(num.length == 1) {
-      num = "0" + num;
-    }
-    return num;
-  }
-
-  function tokenfieldToArray(sel) {
-    return $(sel).tokenfield("getTokens").map(function(t){ return t.value});
+function zero_pad(num) {
+  num = "" + num;
+  if (num.length == 1) {
+    num = "0" + num;
   }
+  return num;
+}
 
-$(function(){
+function tokenfieldToArray(sel) {
+  return $(sel)
+    .tokenfield("getTokens")
+    .map(function (t) {
+      return t.value;
+    });
+}
 
+$(function () {
   // Set the date from JS
   var d = new Date();
-  $("#note_date").val(d.getFullYear()+"-"+zero_pad(d.getMonth()+1)+"-"+zero_pad(d.getDate()));
-  $("#note_time").val(zero_pad(d.getHours())+":"+zero_pad(d.getMinutes())+":"+zero_pad(d.getSeconds()));
-  $("#note_tzoffset").val(tz_seconds_to_offset(d.getTimezoneOffset() * 60 * -1));
+  $("#note_date").val(
+    d.getFullYear() +
+      "-" +
+      zero_pad(d.getMonth() + 1) +
+      "-" +
+      zero_pad(d.getDate())
+  );
+  $("#note_time").val(
+    zero_pad(d.getHours()) +
+      ":" +
+      zero_pad(d.getMinutes()) +
+      ":" +
+      zero_pad(d.getSeconds())
+  );
+  $("#note_tzoffset").val(
+    tz_seconds_to_offset(d.getTimezoneOffset() * 60 * -1)
+  );
 
   // ctrl-s to save
-  $(window).on('keydown', function(e){
-    if(e.keyCode == 83 && e.ctrlKey){
+  $(window).on("keydown", function (e) {
+    if (e.keyCode == 83 && e.ctrlKey) {
       $("#btn_post").click();
     }
   });
-
-})
+});
 
 function auto_prefix_url_field(field) {
   var str = field.value;
-  if(!/^https?:\/\//.test(str)) {
+  if (!/^https?:\/\//.test(str)) {
     str = "http://" + str;
   }
   field.value = str;

public/js/sw.js

@@ -0,0 +1,14 @@
+// NOTE: This currently doesn't cache anything
+// We are just installing it so that chrome users can be
+// prompted to install Quill via add to homescreen
+self.addEventListener("install", installWorker);
+
+async function installWorker() {
+  await self.skipWaiting();
+}
+
+self.addEventListener("activate", activateServiceWorker);
+
+async function activateServiceWorker(event) {
+  event.waitUntil(clients.claim()); // make the current sw the active sw in all pages
+}

views/index.php

@@ -32,4 +32,5 @@
     <a href="" class="u-url"></a>
   </div>
 
+<script src="/js/register-sw.js"></script>
 </div>