Library does not work on IE11 because of Symbol being undefined

[squallstar]

Hello, is there any chance we can get a version of the dist js which works on IE11?

It currently doesn't work because Symbol is undefined so a polyfill will be necessary during the transpiling.

I have tested the latest JS files in the dist folder against IE11.

Many thanks.

[kofrasa]

Hi @squallstar, thanks for opening this issue.

I am not sure adding a polyfill is the right thing to do here. The Symbol object is not required to run Mingo and is only added as a convenience to enable for..of style iteration.

Perhaps the correct thing to add a guard to test for the Symbol support and only add the iterator if it is available in the environment. This frees up users to bring their own polyfill if they want to use the for..of style syntax.

[squallstar]

@kofrasa thanks! Really appreciate the patch you made. Are all dist files up to date so that I can make use of your patch?

[kofrasa]

Yes, the changes are available in dist for release 2.5.0. All files are up to date and should run fine even in environments without Symbol support.

Happy Coding.

[squallstar]

@kofrasa unfortunately this is still an issue on IE11 because "Object.assign" is not supported (see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign).

[kofrasa]

I will make the fix as part of 3.0.0 which attempts to baseline IE support to version 9.

[squallstar]

@kofrasa thanks, meanwhile I have added the above polyfill to make it work.