Spoilers get used pretty heavily on Puzzling.SE, and people have taken to using rot13 in comments (and chat) since there's no official spoiler mark-up outside of questions/answers. That's annoying, but this script will make your life easier.

# Features

• Whenever you're typing a comment, surround any text you want to be spoilered with rot13(<text to be spoilered>)
• Clicking ROT13 will convert all rot13(...) text in your comment (obviously clicking again will convert back)
• Post your comment as usual
2. Automatically convert existing rot13 spoilers in comments
• Any comments containing spoilers in the format rot13(<spoilered text>) will automatically turn into links
• Hover the link to see the unspoilered text in the tooltip
• Click the link to see the unspoilered text in an alert popup
3. Edit (v1.2): Both the above features now also work in SE chat rooms

(I left the encoding process fairly manual so as not to be potentially annoying when writing/editing comments)

• Wonderful! Though I wonder why not use a simple delimiter (like MathJax does) instead of having to type out rot13(...). How about something like, for example, !!...!! or >>...<<, etc. – Gaurang Tandon Jun 14 '18 at 7:47
• @GaurangTandon - two reasons: 1) so people who haven't seen it before (and don't have the script) have some chance of recognising what it is, and 2) because rot13(...) is already the defacto standard used on puzzling.se. – Alconja Jun 14 '18 at 8:17
• This makes dealing with all those rot13(Fcbvyre!) comments on Puzzling much easier, but I prefer to have the converted text replace the original instead of popping up in an alert(), so I replaced line # 82 with var link = <a href="#" onclick="this.innerHTML = 'rot13(${text.replace(/\\/g, "\\\\").replace(/'/g, "\\'")})';return false;" title="${text}" >\${found[0]}</a>; Personally it still isn't perfect for me, so I may make more changes in the future, but I thought you and/or others might want to do this too, as the alert() really broke the flow of things for me. – 3D1T0R Sep 14 '18 at 21:48