Storybook: Version 6.1.0-alpha.0 doesn’t work in IE11 because of highlight dependence

[pavel-sindelka]

Describe the bug

Stroybook 6.1.0-alpha.0 depends on react-syntax-highlighter 13.2.1 which depends on highlight ^10.1.1 and lowlight ^1.14.0 dependencies but according to the changelog of highlight IE11 will no longer be supported

"We're now using ES2015 features in the codebase. Internet Explorer 11 is no longer supported."

Screenshots

[fernandopasik]

would it be possible to understand if a polyfill is needed for ie11 or something?
Could you post the errors in english as well please?

[fernandopasik]

BTW the upgrade was necessary because of a security issue.

[pavel-sindelka]

Its syntax error because IE 11 cant interpret classes

[fernandopasik]

might need to pass the library by the babel config, maybe there's a place we can add that in storybook babel config

@shilman any hint where that could be?

[shilman]

@tooppaaa and @ndelangen worked on recompiling some storybook dependencies for IE compatibility. Hopefully they can lend a hand here.

[tooppaaa]

If someone has a chance to look at it before me, probably a dependency needs to be added to this regexp:
https://github.com/storybookjs/storybook/blob/next/lib/core/src/server/common/es6Transpiler.js

[tooppaaa]

https://github.com/obahareth/are-you-es5/issues/53