initial commit

static/js/app.js

@@ -0,0 +1,25 @@
+const min_playtime = 1000
+const fade_threshold = 2000
+
+function preload_audio (file) {
+  return new Howl({
+    src: [file]
+  })
+}
+
+function play_audio (sound, timeout, callback) {
+  sound.play()
+
+  if (timeout) {
+    if (timeout - fade_threshold > min_playtime) {
+      setTimeout(function () {
+        sound.fade(sound.volume(), 0, fade_threshold)
+      }, timeout - fade_threshold)
+    }
+
+    setTimeout(function () {
+      sound.stop()
+      callback()
+    }, timeout)
+  }
+}