[Pkg-javascript-devel] Bug#995702: TypeError: Cannot read property 'prefix_exceptions' of undefined

[Pirate Praveen]

On 4 October 2021 6:02:19 pm IST, Dominik George <natureshadow at debian.org> wrote:
>>   - let autoprefixerData = { browsers: agents, prefixes: dataPrefixes }
>>   + let autoprefixerData = { browsers: agents.agents, prefixes: dataPrefixes }
>
>It's
>https://github.com/browserslist/caniuse-lite/commit/fde289588b2ccb129ba3d1552134be2c78fee8b7
>
>So, this happened with a recent update of node-autoprefixer, because
>the new autoprefixer relies on the new API of caniuse-lite.
>
>caniuse-lite should, and will at some point, be updated in Debian as
>well. However, this will break node-browserslist, because that relies
>on the old API. Oh the joy!

Is there a new version of browserslist that uses the new API?

>Proposal:
>
> 1. Add a patch to node-autoprefixer to use the old API
> 2. Add a version constraint to the node-caniuse-lite dependency in
>    node-autoprefixer (<< 1.0.30001226~)
> 3. Report a bug against node-caniuse-lite to update to the current
>    upstream version, with a gentle hint on what will break if updated
> 4. Once updated, drop the patch, and remove the version constraint
>
>@ JavaScript team, shall I proceed with that?

I think updating node-caniuse-lite and patching node-browserslist may be better. But if that is difficult, you can go ahead with this.

BTW I had noticed the breakage while updating gitlab and filed a bug, but did not get time to dig deeper. Thanks for these details.

>-nik

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