Re: [csswg-drafts] @font-face overrides for superscript/subscript metrics (#5518)

@kojiishi wrote

> IIRC whatwg tried to change <sup> and <sub> to use font-variant-position but they gave it up. We might want to investigate more before reaching to a conclusion.

They did, and IIRC we asked them not to, because [`font-variant-position`](https://drafts.csswg.org/css-fonts-4/#font-variant-position-prop) uses the OpenType `subs` and `sups` features to enable the use of font-designer-created subscript and superscript glyphs instead of scaling regular glyphs. Where those glyphs exist, it gives a typographically superior result. For **one level** of subscripting or superscripting, only.

While HTML can have

```html
<p><sub>Many<sub>levels<sub>of<sub>subscripting</sub></sub></sub></sub></p>
```

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Received on Wednesday, 30 September 2020 12:29:57 UTC