text: import React from "react"
  
  export const headings = {
    h2: heading("h2"),
    h3: heading("h3"),
    h4: heading("h4"),
    h5: heading("h5"),
  }
  
  function heading(type) {
    return function Heading({ children }) {
      const match = /^.+(\s*\{#([a-z0-9\-_]+?)\}\s*)$/.exec(
        children
      )
  
      const id = match[2]
  
      return React.createElement(
        type,
        {
          id,
          className: "heading",
        },
        <a href={`#${id}`} aria-hidden>
          <svg
            aria-hidden="true"
            height="16"
            version="1.1"
            viewBox="0 0 16 16"
            width="16"
          >
            <path
              fillRule="evenodd"
              d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"
            ></path>
          </svg>
        </a>,
        children.replace(match[1], "")
      )
    }
  }
  