undefined

points

[-]

I think you’ve misunderstood something? This is about suppressing the turning of a segment break into a space, not about line break opportunities.

> Unicode has U+200B ZERO WIDTH SPACE for that purpose.

ZWSP is not at all “for that purpose”. If you mean this:

  A—&ZeroWidthSpace;
  B

Well, I am mildly surprised to find that no extra space is added in Gecko or Blink. But in WebKit, a space is still added; for this is part of the “UA-defined” bit I quoted.

And if you’re willing to do preprocessing, you can just merge the lines, that’d actually work.

> In HTML and hence Markdown you can also use `<wbr>`.

I fail to see how <wbr> is relevant.

by layer86 hours ago|

parent|

[-]

Indeed, I skimmed a bit and misread “unable to break” to mean that you wanted a line-break opportunity but the renderer didn’t allow for it when a letter is directly following an em dash. But it’s the other way around, you want a line break in the source after an em dash to not translate into a space in the rendering. This would likewise be possible to handle by regex replacement as a pre-rendering step.

More generally, I see markup languages and the details of how they are rendered as largely orthogonal. You don’t necessarily need to invent a different markup language in order to adjust the rendering.