SignalR in embedded web browser control

[budcribar]

I have an embedded web-browser control and an embedded Kestrel server in a Windows application. The embedded control uses an older version of IE. IE throws a syntax error when it hits "class Base64EncodedHubProtocol" when it loads Base64EncodedHubProtocol.js What do I need to do to fix this?
change Base64EncodedHubProtocol.js to Base64EncodedHubProtocol.ts and re-compile targeting ES5?

[moozzyk]

Yes, IE does not support ES6 so you need to compile to ES5 (or use the ES5 version included in the dist/browser folder).

[budcribar]

I am also using Angular 4, so I tried setting the .angular-cli.json to:
"scripts": [
"../node_modules/@aspnet/signalr-client/dist/browser/signalr-clientES5-1.0.0-alpha1-final.js",
"js/odometer.min.js",
"js/scroller.min.js"
],

but somehow it gets mapped to loading Base64EncodedHubProtocol.js from the src directory which is not ES5. I have no idea how "ng build" does this but the downloaded file (vendor.js) using the embedded web browser control or Internet Explorer 11 is different than if I download it using Edge or Chrome. Any suggestions?

[moozzyk]

Take a look at:
#729
angular/angular-cli#7532
#867
and let me know if this helps.

[budcribar]

I included the client sources in my project so they would compile down to ES5 and it seems to work. Haven't tried to do "ng build --prod" yet. Not a great solution for those trying to support old browsers...

[moozzyk]

As per #867 (comment) it might be fixed soon in the Angular-cli