While highlights was the only case where this came up in the normal
message feed, we might in the future have other elements inside a
link, and we don't want those to ever eat the click.
I don't think there's a real performance concern here; fundamentally,
this is the handler for the user clicking, it can traverse a few DOM
elements.
Adds support for clicking anywhere on the header (except in a link) to
expand a spoiler block. Also fixes jumpy animation glitch on spoiler
collapse.
Fixes#15414.
Co-authored-by: Sara Gulotta <sgorecki@gmail.com>
This adds support for a "spoiler" syntax in Zulip's markdown, which
can be used to hide content that one doesn't want to be immediately
visible without a click.
We use our own spoiler block syntax inspired by Zulip's existing quote
and math block markdown extensions, rather than requiring a token on
every line, as is present in some other markdown spoiler
implementations.
Fixes#5802.
Co-authored-by: Dylan Nugent <dylnuge@gmail.com>
Anders Kaseorg
Tim Abbott
Dylan Nugent
Sara Gulotta