letter-spacing definition "removes" percentage - not possible

[dirkschulze]

The SVG2 spec says that percentage get "removed" from the letter-spacing property. That is not possible. Just like for word-spacing we need to decide what percentage values resolve to or are relative to.

https://svgwg.org/svg2-draft/text.html#LetterSpacingProperty

[dirkschulze]

Ideally, all definitions should move to the responsible specifications. Even the SVG specific bits I think.

[AmeliaBR]

It's removed in the sense that it is not a valid value, per CSS Text Level 3.

This is a change from the definition in SVG 1.1, which allowed percentages as SVG lengths.

I haven't tested whether any browsers support percentage values as defined in SVG 1.1, but I doubt it. If they did, that would be an issue to take up with CSS to make the spec match reality.

The statement about the change should really be part of a note, rather than a normative statement, though.

[dirkschulze]

@AmeliaBR Ah SVG 1.1 at its best. Thanks for the clarification. In a short test, Safari, Firefox and Chrome do not support percentage.

[svgeesus]

So instead of "removes" we should say "no longer allows" percentage values relative to the size of viewport.