Add transformAttributes option to @svgr/core and hast-util-to-babel-ast

[bensaufley]

Summary

Allows disabling of JSX Attribute transformation (camelCasing of kebab-case attributes), which benefits Preact users (who are otherwise supported by SVGR explicitly, by jsxRuntime: 'classic-preact').

Would resolve #450

Test plan

Added a test/snapshot within hast-util-to-babel-ast to test that the output is as expected. Confirmed that other tests and snapshots were unaffected.

Notes

This is purely additive, with a default value of true to keep existing behavior.

I considered using discernible Preact implementation to set this to false by default, because without preact/compat, SVGR does not currently work with Preact. So something like jsx.transformAttributes ?? (config.jsxRuntime === 'classic-preact' || config.jsxRuntimeImport?.source.startsWith('preact')) – but I think it's a bad idea to make a breaking change like that.

I originally passed a separate config object all through the HAST package, but then I realized that Helpers was already sort of being used for that purpose? So I just spread the config into it. Let me know if that's an unreasonable approach.

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Name	Status	Preview	Comments	Updated (UTC)
svgr	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 20, 2023 4:16pm

[bensaufley]

TBH I have no idea if this was the best way to go about this; I'm not totally familiar with the codebase. But I figured a PR would be better than just pinging on a closed issue

[gregberge]

Hello @bensaufley, thanks for this, could you please fix the tests?

[bensaufley]

@gregberge looks like it was just Prettier first time around—ironically I had undone some of that stuff because I assumed it was my local settings. But a note: I have added the ability to pass in a custom transformer function, very simple, just a (orig: string) => string function, just because it seemed like it made sense while I was here. I'm not sure how many use cases there are for it, but it seems like a no-brainer to me. LMK if you think it's a bad idea.

[bensaufley]

@gregberge are these "Deploy canceled" things failures of some kind I need to fix? I don't think so but just want to confirm. Anything else I can be doing here?

[bensaufley]

@gregberge happy new year! Any chance this can move forward?

[bensaufley]

@gregberge anything I can do to help this get merged/released? This is the only reason we're importing preact/compat into our application and besides filesize, preact/compat has all sorts of side effects that aren't all positive.