add countdown and some bug fixes like csv

assets/development/scripts/countdown.js

@@ -0,0 +1,47 @@
+const countdown = document.getElementById('countdown')
+const counter = document.getElementById('counter')
+
+const daysContainer = document.getElementById('days')
+const hoursContainer = document.getElementById('hours')
+const minutesContainer = document.getElementById('minutes')
+const secondsContainer = document.getElementById('seconds')
+
+let target = new Date("2020-09-04 15:00:00")
+
+let shown = false
+
+function render() {
+  let current = new Date()
+  let difference = target - current
+
+  var _second = 1000,
+    _minute = _second * 60,
+    _hour = _minute * 60,
+    _day = _hour * 24;
+
+  var days = Math.floor(difference / _day),
+    hours = Math.floor((difference % _day) / _hour),
+    minutes = Math.floor((difference % _hour) / _minute),
+    seconds = Math.floor((difference % _minute) / _second);
+
+    days = (String(days).length >= 2) ? days : '0' + days;
+    hours = (String(hours).length >= 2) ? hours : '0' + hours;
+    minutes = (String(minutes).length >= 2) ? minutes : '0' + minutes;
+    seconds = (String(seconds).length >= 2) ? seconds : '0' + seconds;
+  
+  daysContainer.textContent = days
+  hoursContainer.textContent = hours
+  minutesContainer.textContent = minutes
+  secondsContainer.textContent = seconds
+  
+  if (!shown) {
+    setTimeout(() => {
+      countdown.style.opacity = 1
+      shown = true
+    }, 300)
+  }
+}
+
+
+render()
+setInterval(render, 1000)