redirect.njk

---js
{
  pagination: {
    data: 'collections.all',
    size: 1,
    alias: 'redirect',
    before: function (data) {
      return data.reduce((redirects, page) => {
        if (Array.isArray(page.data.redirect_from)) {
          for (let url of page.data.redirect_from) {
            redirects.push({ to: page.url, from: url });
          }
        } else if (typeof page.data.redirect_from === 'string') {
          redirects.push({ to: page.url, from: page.data.redirect_from });
        }
        return redirects;
      }, []);
    },
    addAllPagesToCollections: false,
  },
  permalink: '{{ redirect.from }}/index.html',
  eleventyExcludeFromCollections: true,
}
---
<!DOCTYPE html>
<html lang='en-US'>
  <meta charset='utf-8' />
  <title>Redirecting&hellip;</title>
  <link rel='canonical' href='{{ redirect.to | url }}' />
  <script>location = '{{ redirect.to | url }}';</script>
  <meta http-equiv='refresh' content='0; url={{ redirect.to | url }}' />
  <meta name='robots' content='noindex' />
  <h1>Redirecting&hellip;</h1>
  <a href='{{ redirect.to | url }}'>Click here if you are not redirected.</a>
</html>