解决问题

src/services/web/index.js

@@ -1,4 +1,4 @@
-import { BarcodeDetector as BarcodeDetectorPonyfill, prepareZXingModule } from "barcode-detector/dist/cjs/index.js";
+import { BarcodeDetector as BarcodeDetectorPonyfill, prepareZXingModule } from "barcode-detector/dist/cjs/ponyfill.js";
 import { createUUID } from "../../utils/uuid";
 import { getConfig } from "../config";
 import scanBeepAudio from "../../../res/scan_beep.ogg";
@@ -11,7 +11,10 @@ const scanWeb = {
 }
 
 const DEFAULT_SCAN_BEEP_AUDIO = scanBeepAudio;
-const ZXING_READER_WASM_URL = "./lib/reader.wasm";
+const ZXING_READER_WASM_PATH = "lib/reader.wasm";
+const currentScriptSrc = typeof document !== "undefined"
+  && document.currentScript
+  && document.currentScript.src;
 
 let barcodeDetectorPreparePromise = null;
 let scanBeepAudioEl = null;
@@ -128,23 +131,30 @@ function getBarcodeDetectorClass() {
   return BarcodeDetectorPonyfill;
 }
 
+function getZXingReaderWasmUrl() {
+  if (currentScriptSrc) {
+    return new URL(ZXING_READER_WASM_PATH, currentScriptSrc).href;
+  }
+  return "./" + ZXING_READER_WASM_PATH;
+}
+
 function prepareBarcodeDetector() {
   const BarcodeDetectorClass = getBarcodeDetectorClass();
   if (typeof BarcodeDetector !== 'undefined' || !prepareZXingModule) {
     return Promise.resolve(BarcodeDetectorClass);
   }
   if (!barcodeDetectorPreparePromise) {
-    prepareZXingModule({
+    barcodeDetectorPreparePromise = prepareZXingModule({
+      fireImmediately: true,
       overrides: {
         locateFile: path => {
           if (path && path.indexOf(".wasm") !== -1) {
-            return ZXING_READER_WASM_URL;
+            return getZXingReaderWasmUrl();
           }
           return path;
         }
       }
-    });
-    barcodeDetectorPreparePromise = Promise.resolve(BarcodeDetectorClass);
+    }).then(() => BarcodeDetectorClass);
   }
   return barcodeDetectorPreparePromise;
 }