It could be client side, where you're using it to hide content from someone who doesn't want to see something potentially abusive. I did assume the example was

It could be client side, where you're using it to hide content from someone who doesn't want to see something potentially abusive. I did assume the example was client side, but it might not be. The server may be using it to avoid adding a comment to a database if it's abusive. URLSearchParams exists in Node too https://nodejs.org/api/url.html#url_class_urlsearchparams https://nodejs.org/api/url.html#url_class_urlsearchparams. There are fetch polyfills available, but the plan is to add it to node.