add simpleanalytics.com to gatsby

gatsby-ssr.js

const React = require("react")
exports.onRenderBody = ({ setPostBodyComponents }) => {
  if (process.env.NODE_ENV !== `production`) {
    return null
  }

  return setPostBodyComponents([
    <script
      key="simpleanalytics"
      async
      defer
      src="https://visits.yourdomain.com/app.js"
    />,
    <noscript key="simpleanalytics-no-script">
      <img src="https://visits.yourdomain.com/image.gif" alt="" />
    </noscript>,
  ])
}

instruction.md

• Add a the content of the gist above in a file named gatsby-ssr.js in the root of your gatsby project
• replace yourdomain.com with your actual domain

code from the app file use an event listener on pushState for navingation is already hadled https://raw.githubusercontent.com/simpleanalytics/cdn/master/external.js