Caniuse: CSS Values and Units Module Level 4 ("CSS 4 length"): vi, vb, ic, lh, and rlh

[Schweinepriester]

https://developer.mozilla.org/en-US/docs/Web/CSS/length#Specifications

Adds the vi, vb, ic, lh, and rlh units.

Spec: https://drafts.csswg.org/css-values/

cap is technically part of this too, but already requested in #3287.

Maybe this could get split in sub-issues depending on if and when the browsers implement those units…

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lh
Equal to the computed value of the line-height property of the element on which it is used, converted to an absolute length.

<3

[Malvoz]

+1

[chharvey]

vi and vb have already been requested in #2649

[Schweinepriester]

https://webkit.org/blog/10428/release-notes-for-safari-technology-preview-105/

Added support for font-relative lh and rlh unit frp, CSS Values Level 4 specification (r259703)

Chrome:

• https://bugs.chromium.org/p/chromium/issues/detail?id=778495
• https://bugs.chromium.org/p/chromium/issues/detail?id=937104

Every unit mentioned here is by now via MDN on caniuse, for example: https://caniuse.com/#search=lh%20unit

[chharvey]

The table on MDN can be found here:
https://developer.mozilla.org/en-US/docs/Web/CSS/length#Browser_compatibility

[Ugoku]

Bugzilla link for lh/rlh: https://bugzilla.mozilla.org/show_bug.cgi?id=1310170

[Fyrd]

Closing now these are available under https://caniuse.com/#search=css%20length