Uncaught ReferenceError: Map is not defined at line

[ahiyalala]

I added the server.bundle.js and this error showed up. Upon looking at the bundle I figured out that it came from this line, it must have come from one of the 3rd party libraries that our other devs included but I can't be certain which one. I also figured out that it has something to do with the polyfills but I don't know how to resolve that as well:

`var scheduleWork = void 0;
var cancelScheduledWork = void 0;

if (!ExecutionEnvironment.canUseDOM) {
  var timeoutIds = new Map();

  scheduleWork = function (callback, options) {
    // keeping return type consistent
    var callbackConfig = {
      scheduledCallback: callback,
      timeoutTime: 0,
      next: null,
      prev: null
    };`

[Taritsyn]

Hello!

You need to use a JS engine that supports ECMAScript 6: JavaScriptEngineSwitcher.ChakraCore and JavaScriptEngineSwitcher.V8. I recommend also reading the “Misconceptions about the JavaScript Engine Switcher version 2.X” discussion.

[ahiyalala]

Hi @Taritsyn ! Thanks for your reply.

ChakraCore and V8 is already included in our solution and I've followed installing the native assemblies (JavaScriptEngineSwitcher.V8.Native.win-x86 and JavaScriptEngineSwitcher.V8.Native.win-x64.) but the app still renders the same error. Am I missing some steps?

[ahiyalala]

Hi!

It's been resolved now. I just have to add this on Configure:

engineSwitcher.EngineFactories.AddChakraCore()
                                          .AddV8();

[Taritsyn]

I would also add the following line after:

...
engineSwitcher.DefaultEngineName = V8JsEngine.EngineName;