scrollspy for table of contents

[pkra]

I thought I had seen an issue for this before but didn't find it. Apologies if I missed a previous discussion.

Is your feature request related to a problem? Please describe.

On most W3C specs, it can become difficult to discern the current reading position. In particular, when following cross-references or references from other specs to definitions inside a large spec.

Describe the solution you'd like

A scrollspy-like feature (cf. bootstrap's example can help readers by indicating (visually and programmatically) the current TOC items that are intersecting with the viewport.

[sidvishnoi]

I think this would be best implemented in w3c/tr-design, so all specs can use it (not just ReSpec ones). cc @deniak

[pkra]

Thanks @sidvishnoi. Turns out there's already w3c/tr-design#108

Is there is an agreement that output markup should align between respec and bikeshed? Otherwise it seems difficult to maintain a shared implementation. (Also, there are non-W3C respec users, no?)

Anyway, if tr-design is the way, then please feel free to close this issue as a duplicate.