Error in Internet Explorer

[JamesHabben]

pattern using character ranges in square brackets when using Internet Explorer causes "unterminated character class" error. Same pattern does not error in Chrome. [0-4]

[CJex]

Sorry,it's my fault. But currently I have no Windows IE to test. I'll try to install Windows in Virtualbox on my linux laptop to test it later. I guess possiblely this error is caused by string index.

Could you attach a screenshot of the dev console with detailed error message?

[JamesHabben]

When I bring up the F12 developer tools, I get an error about a load timeout on require.min.js and I don't get the same error as displayed in the screen above. The page doesn't function at all, and I am not real familiar with the F12 tools in IE.

[kunapyanov]

Same error in IE 10. Rule like [0-9] works. Maybe it helps. There is no error in my console.

[JamesHabben]

Mine is IE 11

[CJex]

Now Fixed.
UglifyJS unescape my unicode escape "\uFFFF".
IE recognize U+FFFF in source code string as U+FFFD.

UglifyJS2's new version may have fixed this problem:

• "\uFEFF" in strings removed, breaks React build. mishoo/UglifyJS#556
• Issue with compressing escaped UTF8 characters mishoo/UglifyJS#54

[JamesHabben]

Looks fixed from my view. Thanks!