
(Last updated in 21/04/2019) - (Versão em Português deste tutorial aqui!)
I've been searching for a way to customize "Not found" pages on themes for Tumblr for a while. I found a few tutorials about it, but none of them would work in every blog, they would only work for blogs of a certain language (since the code would select the page basing on the error phrase that it shows, and this phrase changes according to the language of the blog, making it impossible for the script to find it in blogs that are set in other languages).
Until one day, as I was studying JQuery (thanks to W3Schools), I found a method that could work for any blog on Tumblr, since it selects the page based on its status (whether it's an error page or not). I tried it and it worked! 🙌 So, to anyone interested, here is my tutorial on how to customize "not found" pages on Tumblr using Ajax.
