import rehypeParse from 'rehype-parse'
import rehypeSvgo from 'rehype-svgo'
import rehypeStringify from 'rehype-stringify'
import { read } from 'to-vfile'
import { unified } from 'unified'

const file = await unified()
  .use(rehypeParse)
  .use(rehypeSvgo, {
    // https://github.com/svg/svgo#configuration
    svgoConfig: {
      multipass: true,
      plugins: [`preset-default`],
    },
  })
  .use(rehypeStringify)
  .process(await read(`index.html`))

console.log(String(file))