support multiple dates

main.js

@@ -13,26 +13,36 @@ const countdown = (target, heading) => {
     timeleft.minutes = Math.trunc(diff%day%hour/minute);
     timeleft.seconds = Math.trunc(diff%day%hour%minute/second);
 
-    const formatted = Object.keys(timeleft).map((unit) => {
+    const formatted = Object.keys(timeleft).map(unit => {
         // retrieve value, cast it to string and optionally pad it with a leading 0
         return timeleft[unit]
         .toString()
         .padStart(2, '0');
     });
 
-    return `
+    if (heading === 1 || formatted.filter(timespan => timespan.substr(0, 1) == '-').length === 0) {
+        return `
 <h${heading}>${formatted[0]} Days</h${heading}>
 <h${heading}>${formatted[1]} Hours</h${heading}>
 <h${heading}>${formatted[2]} Minutes</h${heading}>
 <h${heading}>${formatted[3]} Seconds</h${heading}>
 `;
+    }
 };
 
-const hash_date = new Date(location.hash.substr(1))
+const hash_date = new Date(location.hash.substr(1));
 const update_all = () => {
-    let i = 1
+    let i = 0;
-    const date_list = location.hash.split('#').slice(1).map((fragment) => {return new Date(fragment)})
+    const curDate = new Date();
-    document.getElementById('output').innerHTML = countdown(date_list[0], i);
+
+    document.body.innerHTML = location
+    .hash
+    .split('#')
+    .slice(1)
+    .map(fragment => new Date(fragment))
+    .sort((a, b) => b - a)
+    .map(date => countdown(date, ++i))
+    .join('');
 }
 update_all();
 setInterval(update_all, 500);