UnoCSS version

0.56.5

Describe the bug

when using the variant group transformer and including js/ts files in your unocss pipeline like:

UnoCSS({
  content: {
    pipeline: {
      include: [
        /\.(vue|svelte|[jt]sx?|mdx?|astro|elm|php|phtml|html)($|\?)/,
      ],
    },
  }
})

unocss is changing the regular expressions with brackets in it.
like the camelizeRE from vue

var camelizeRE = /-(\w)/g;

becomes:

var camelizeRE = /-\w/g;

this happens also with user code:
checkout out App.vue in the reproduction and watch the Browser console
the brackets gets eliminated from the regular expression

for the vuejs transformations, watch the stackblitz console and then comment out the

transformers: [transformerVariantGroup()],

line

Reproduction

https://stackblitz.com/edit/unocss-unocss-krecms?file=src%2FApp.vue,vite.config.ts,src%2Fmain.ts

System Info

No response

Validations

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• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
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• The provided reproduction is a minimal reproducible example of the bug.