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// markdown-it plugin for wrapping <pre> ... </pre>.
//
// If your plugin was chained before preWrapper, you can add additional eleemnt directly.
// If your plugin was chained after preWrapper, you can use these slots:
// 1. <!--beforebegin-->
// 2. <!--afterbegin-->
// 3. <!--beforeend-->
// 4. <!--afterend-->
module.exports = md => {
const fence = md.renderer.rules.fence
md.renderer.rules.fence = (...args) => {
const [tokens, idx] = args
const token = tokens[idx]
const rawCode = fence(...args)
return `<!--beforebegin--><div class="language-${token.info.trim()} extra-class">` +
`<!--afterbegin-->${rawCode}<!--beforeend--></div><!--afterend-->`
}
}
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