Add dice

src/index.js

@@ -13,6 +13,16 @@ const mapPlaceholder = document.querySelector('.map-placeholder'),
   fileName = localStorage.getItem('map') || 'scenario-side_show',
   map = `assets/images/${fileName}.svg`,
   fileInputEl = document.querySelector('input[type="file"]'),
+  dice = document.querySelectorAll('.die'),
+
+  d6 = {
+    1: 'one',
+    2: 'two',
+    3: 'three',
+    4: 'four',
+    5: 'five',
+    6: 'six'
+  },
 
   toggleContentVis = (function () {
     document.querySelectorAll('#content > div').forEach(div => {
@@ -26,7 +36,7 @@ const mapPlaceholder = document.querySelector('.map-placeholder'),
     localStorage.setItem('content-visibility', this.checked);
   }).bind(contentVisToggleEl);
 
-  let mapResourceEl = document.querySelector('object');
+let mapResourceEl = document.querySelector('object');
 
 function loadScenario(data) {
   const current = document.querySelector('object');
@@ -61,6 +71,19 @@ function clearMoveEndedIndicators(records) {
   records.forEach(el => el.classList.remove('movement-ended'));
 }
 
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random#getting_a_random_integer_between_two_values_inclusive
+function getRandomIntInclusive(min, max) {
+  const minCeiled = Math.ceil(min);
+  const maxFloored = Math.floor(max);
+  return Math.floor(Math.random() * (maxFloored - minCeiled + 1) + minCeiled); // The maximum is inclusive and the minimum is inclusive
+}
+
+// ⚀ ⚁ ⚂ ⚃ ⚄ ⚅
+function roll(die) {
+  const numsAsWords = Object.values(die);
+  return numsAsWords[getRandomIntInclusive(0, numsAsWords.length - 1)];
+}
+
 function load() {
   const svg = this.contentDocument.querySelector('svg'),
     startLocs = svg.querySelector('.start-locations')
@@ -185,3 +208,22 @@ document.querySelector('input[type="file"]').addEventListener('change', e => {
   const [file] =  fileInputEl.files;
   loadScenario(URL.createObjectURL(file))
 });
+
+dice.forEach(el => {
+  el.classList.add(roll(d6));
+
+  el.addEventListener('animationend', e => {
+    if (e.animationName === 'roll-out') {
+      el.classList.remove('roll-out');
+      el.classList.replace(el.classList.item(1), roll(d6));
+      el.classList.add('roll-in');
+    }
+  });
+});
+
+document.querySelector('#roll-dice').addEventListener('click', () => {
+  dice.forEach(el => {
+    el.classList.remove('roll-in');
+    el.classList.add('roll-out');
+  });
+});