I'd love to see [the existing spoiler][1] be enhanced for that. The syntax is:

<pre>&gt;! Spoiler text</pre>

Lacking [a proper hover][2] on some devices, the new mobile sites render this as:

<a href="https://i.sstatic.net/er26r.png"><img src="https://i.sstatic.net/er26r.png" width="150" alt="Click to show spoiler on mobile site"></a>

On the regular websites, one still needs to hover the hidden text to reveal it. This includes tablets like the iPad, where [not everyone knows][3] that hovering is initiated by tapping first. And it shows many blank lines for long spoilers. Like:

>! Moon languages rock!  
>!  
>! From http://en.wiktionary.org/wiki/moon_language  
>! **Noun**  
>! **moon language** (*plural* **moon languages**)  
>! <ol><li> (*slang*) Text written in an incomprehensible script, especially Japanese or Chinese.</li></ol>  
>! <sub>(Multi-line spoilers need [Markdown double-spaces](https://meta.stackexchange.com/questions/26011/should-the-markdown-renderer-treat-a-single-line-break-as-br) to get a newline. Automatic lists, headings, et cetera are not supported.)</sub>

I'd like something similar to the mobile sites on the regular sites too, but:

- Labeled "Click to show hidden text" (rather than "spoiler").
- Maybe a single link to show *all* hidden text? (That might not be too nice for real spoilers.)

On the other hand: beware that the handling of Markdown within the spoilers [is very limited][4]. One cannot easily change an existing block into a spoiler.

(Click the "mobile" link at the bottom of this page to see the mobile rendering in a regular browser too. To switch back, click "full site", though that [does not look like a link](https://meta.stackexchange.com/questions/108046/mouse-cursor-doesnt-change-to-pointer-when-hovering-full-site-on-mobile).)


  [1]: https://meta.stackexchange.com/questions/1191/add-markdown-support-for-hidden-until-you-click-text-aka-spoilers/71396#71396
  [2]: https://meta.stackexchange.com/questions/75656/cant-see-spoilers-on-touchscreen
  [3]: https://meta.stackexchange.com/questions/129343/how-do-i-view-spoilers-on-an-ipad
  [4]: https://meta.stackoverflow.com/revisions/5aa25268-c85b-490d-b805-3dd56c011130/view-source