While I understand the argument for keeping the library "untranspiled," you may want to reconsider using this version in the examples. Ideally, examples should work in the average browser. JMHO.
I think I found the problem. Check caniuse.com for Edge's webplatform score.
Edge: 236
Chrome: 304
Firefox: 298
Yup. You're going to have a bad time with that.
P.S: this should work with Edge16 (requires latest version of Windows 10; 1709)