Fixed Events; Added example for multiple types of barcodes

src/common/events.js

@@ -50,10 +50,17 @@ export default function createEventedElement() {
             var event = getEvent(eventName),
                 subscribers = event.subscribers;
 
-            event.subscribers = subscribers.filter(function(subscriber) {
+            subscribers.filter(function(subscriber) {
+                return !!subscriber.once;
+            }).forEach((subscriber) => {
                 publishSubscription(subscriber, data);
+            });
+            event.subscribers = subscribers.filter(function(subscriber) {
                 return !subscriber.once;
             });
+            event.subscribers.forEach((subscriber) => {
+                publishSubscription(subscriber, data);
+            });
         },
         once: function(event, callback, async) {
             subscribe(event, {

src/input/camera_access.js

@@ -36,11 +36,12 @@ function initCamera(video, constraints) {
     .then((stream) => {
         return new Promise((resolve, reject) => {
             streamRef = stream;
-            video.src = window.URL.createObjectURL(stream);
-            video.onloadedmetadata = (e) => {
+            video.setAttribute("autoplay", 'true');
+            video.srcObject = stream;
+            video.addEventListener('loadedmetadata', (e) => {
                 video.play();
                 resolve();
-            };
+            });
         });
     })
     .then(waitForVideo.bind(null, video));

src/quagga.js

@@ -48,7 +48,7 @@ function fromImage(config, imageSrc, inputConfig = {}) {
         toPromise() {
             return new Promise((resolve, reject) => {
                 scanner.decodeSingle(config, (result) => {
-                    if (result.codeResult && result.codeResult.code) {
+                    if (result && result.codeResult && result.codeResult.code) {
                         return resolve(result);
                     }
                     return reject(result);
@@ -80,7 +80,6 @@ function fromVideo(config, source, inputConfig = {}) {
     } else if (typeof source === 'object'
             && (typeof source.constraints !== 'undefined'
             || typeof source.area !== 'undefined')) {
-        console.log("inputConfig");
         inputConfig = source;
     } else if (!source) {
         // LiveStream

src/scanner.js

@@ -69,7 +69,6 @@ function createScanner() {
         }
 
         _inputStream.setAttribute("preload", "auto");
-        _inputStream.setAttribute("autoplay", true);
         _inputStream.setInputStream(_config.inputStream);
         _inputStream.addEventListener("canrecord", canRecord.bind(undefined, cb));
     }