29 done

goodmanship · goodmanship · commit acd21fc9fb85 · 2017-05-08T22:31:13.000-07:00
diff --git a/29 - Countown Timer/index.html b/29 - Countown Timer/index.html
@@ -24,6 +24,6 @@ <h1 class="display__time-left"></h1>
     </div>
   </div>
 
-  <script src="scripts-START.js"></script>
+  <script src="scripts-RIO.js"></script>
 </body>
 </html>
diff --git a/29 - Countown Timer/scripts-RIO.js b/29 - Countown Timer/scripts-RIO.js
@@ -0,0 +1,48 @@
+const timerDisplay = document.querySelector('.display__time-left')
+const endTime = document.querySelector('.display__end-time')
+const buttons = document.querySelectorAll('.timer__button')
+let countdown
+
+function timer(s) {
+  clearInterval(countdown)
+  const now = Date.now()
+  const then = now + s * 1000
+  displayTimeLeft(s)
+  displayEndTime(then)
+  countdown = setInterval(() => {
+    const secondsLeft = Math.round((then - Date.now())/1000)
+    if (secondsLeft < 0) {
+      clearInterval(countdown)
+      return
+    }
+    displayTimeLeft(secondsLeft)
+  }, 1000)
+}
+
+function displayTimeLeft(s) {
+  const min = Math.floor(s / 60)
+  const remainingS = s % 60
+  const display = `${min}:${remainingS < 10 ? '0' : ''}${remainingS}`
+  timerDisplay.textContent = display
+  document.title = display
+}
+
+function displayEndTime(timestamp) {
+  const end = new Date(timestamp)
+  const hrs = end.getHours()
+  const min = end.getMinutes()
+  endTime.textContent = `Be back at ${hrs > 12 ? hrs - 12 : hrs}:${min < 10 ? '0' : ''}${min}`
+}
+
+function startTimer() {
+  const seconds = parseInt(this.dataset.time)
+  timer(seconds)
+}
+
+buttons.forEach(button => button.addEventListener('click', startTimer))
+document.customForm.addEventListener('submit', function(e) {
+  e.preventDefault()
+  const mins = this.minutes.value
+  timer(mins * 60)
+  this.reset()
+})
