Keyboard and focus improvements

src/js/utils/events.js

@@ -27,9 +27,21 @@ const supportsPassiveListeners = (() => {
 })();
 
 // Toggle event listener
-export function toggleListener(element, event, callback, toggle = false, passive = true, capture = false) {
+export function toggleListener(
+    element,
+    event,
+    callback,
+    toggle = false,
+    passive = true,
+    capture = false,
+) {
     // Bail if no element, event, or callback
-    if (!element || !('addEventListener' in element) || is.empty(event) || !is.function(callback)) {
+    if (
+        !element ||
+        !('addEventListener' in element) ||
+        is.empty(event) ||
+        !is.function(callback)
+    ) {
         return;
     }
 
@@ -57,28 +69,74 @@ export function toggleListener(element, event, callback, toggle = false, passive
             this.eventListeners.push({ element, type, callback, options });
         }
 
-        element[toggle ? 'addEventListener' : 'removeEventListener'](type, callback, options);
+        element[toggle ? 'addEventListener' : 'removeEventListener'](
+            type,
+            callback,
+            options,
+        );
     });
 }
 
 // Bind event handler
-export function on(element, events = '', callback, passive = true, capture = false) {
-    toggleListener.call(this, element, events, callback, true, passive, capture);
+export function on(
+    element,
+    events = '',
+    callback,
+    passive = true,
+    capture = false,
+) {
+    toggleListener.call(
+        this,
+        element,
+        events,
+        callback,
+        true,
+        passive,
+        capture,
+    );
 }
 
 // Unbind event handler
-export function off(element, events = '', callback, passive = true, capture = false) {
-    toggleListener.call(this, element, events, callback, false, passive, capture);
+export function off(
+    element,
+    events = '',
+    callback,
+    passive = true,
+    capture = false,
+) {
+    toggleListener.call(
+        this,
+        element,
+        events,
+        callback,
+        false,
+        passive,
+        capture,
+    );
 }
 
 // Bind once-only event handler
-export function once(element, events = '', callback, passive = true, capture = false) {
+export function once(
+    element,
+    events = '',
+    callback,
+    passive = true,
+    capture = false,
+) {
     function onceCallback(...args) {
         off(element, events, onceCallback, passive, capture);
         callback.apply(this, args);
     }
 
-    toggleListener.call(this, element, events, onceCallback, true, passive, capture);
+    toggleListener.call(
+        this,
+        element,
+        events,
+        onceCallback,
+        true,
+        passive,
+        capture,
+    );
 }
 
 // Trigger event
@@ -115,6 +173,9 @@ export function unbindListeners() {
 // Run method when / if player is ready
 export function ready() {
     return new Promise(
-        resolve => (this.ready ? setTimeout(resolve, 0) : on.call(this, this.elements.container, 'ready', resolve)),
+        resolve =>
+            this.ready
+                ? setTimeout(resolve, 0)
+                : on.call(this, this.elements.container, 'ready', resolve),
     ).then(() => {});
 }