Sometimes the nk20 is too laggy

note_kfet/static/js/konami.js

@@ -0,0 +1,38 @@
+/*
+ * Konami code support
+ */
+
+// Cursor denote the position in konami code
+let cursor = 0
+const KONAMI_CODE = [38, 38, 40, 40, 37, 39, 37, 39, 66, 65]
+
+function afterKonami() {
+    // Load Rythm.js
+    var rythmScript = document.createElement('script')
+    rythmScript.setAttribute('src','https://unpkg.com/rythm.js@2.2.5/rythm.min.js')
+    document.head.appendChild(rythmScript)
+
+    rythmScript.addEventListener('load', function() {
+        // This media source need to be accessible with a cross-origin header
+        const audioElement = new Audio('https://okazari.github.io/Rythm.js/samples/rythmC.mp3')
+        audioElement.crossOrigin = 'anonymous'
+        audioElement.play();
+
+        const rythm = new Rythm()
+        rythm.connectExternalAudioElement(audioElement)
+        rythm.addRythm('card', 'pulse', 0, 10)
+        rythm.addRythm('nav-link', 'color', 0, 10, {
+           from: [0,0,255],
+           to:[255,0,255]
+        })
+        rythm.start()
+    });
+}
+
+// Register custom event
+document.addEventListener('keydown', (e) => {
+    cursor = (e.keyCode == KONAMI_CODE[cursor]) ? cursor + 1 : 0;
+    if (cursor == KONAMI_CODE.length) {
+        afterKonami()
+    }
+});