Last modified: 2013-12-07 07:18:00 UTC
Users have to input a valid page title, and that is checked when they hit preview. We can give faster feedback by using javascript to verify the page title is valid and that it exists.
Change 100117 had a related patch set uploaded by Theopolisme: Add spamlist title inline validation https://gerrit.wikimedia.org/r/100117
Change 100117 merged by jenkins-bot: Add spamlist title inline validation https://gerrit.wikimedia.org/r/100117