This feature was introduced in Next.js 9.5 and up. If you’re using older versions of Next.js, please upgrade before trying it out.
By default Next.js will redirect urls with trailing slashes to their counterpart without a trailing slash. For example /about/ will redirect to /about. You can configure this behavior to act the opposite way, where urls without trailing slashes are redirected to their counterparts with trailing slashes.
Open next.config.js and add the trailingSlash config:
module.exports = {
trailingSlash: true,
}
With this option set, urls like /about will redirect to /about/.