Luckily, you can downcompile to ES5 using the exact same tool: Babel. See for an example: <a href="https:&#x2F;&#x2F;github.com&#x2F;marten-de-vries&#x2F;kneden&#x2F;tree&#x2F;master&#x2F;test&#x2F;fixtures&#x2F;pouchdb-auth" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;marten-de-vries&#x2F;kneden&#x2F;tree&#x2F;master&#x2F;test&#x2F;f...</a><p>Anyway, I agree, the sooner Kneden becomes obsolete, the better!