Update read-from-existing-files.md

Author: yqz5625

programming/javascript/faq/read-from-existing-files.md

@@ -10,8 +10,19 @@ needAutoGenerateSidebar: false
 
 [<< Back to FAQ index](index.md)
 
-Yes, the JavaScript SDK supports reading from a file in local memory. This can be achieved via the `BarcodeReader` class instead of the `BarcodeScanner` class.
+Yes, the JavaScript SDK supports reading from a file in local memory. 
 
+## Version 10.x
+```javascript
+let router = await Dynamsoft.CVR.CaptureVisionRouter.createInstance();
+// Use the router to perform a job.
+let results = await router.capture("blob:https://demo.dynamsoft.com/afb84bd2-e8cb-4b96-92b6-36dc89783692", "ReadSingleBarcode");
+// ...
+// Release the resources after the job is finished.
+router.dispose();
+```
+
+## Version 9.x
 ```javascript
 let reader = await Dynamsoft.DBR.BarcodeReader.createInstance();
 let results = await reader.decode(imageSource);