SVG fonts

Method of using fonts defined as SVG shapes. Removed from [SVG 2.0](https://www.w3.org/TR/SVG2/changes.html#fonts) and considered as a deprecated feature with support being removed from browsers.

css at-rule: `@font-face`: svg fonts

svg element: font

svg element: font-face

svg element: font-face-format

svg element: font-face-format: string

svg element: font-face-name

svg element: font-face-name: name

svg element: font-face-src

svg element: font-face-uri

svg element: font-face-uri: xlink:href

svg element: font-face: accent-height

svg element: font-face: alphabetic

svg element: font-face: ascent

svg element: font-face: bbox

svg element: font-face: cap-height

svg element: font-face: descent

svg element: font-face: font-family

svg element: font-face: font-size

svg element: font-face: font-stretch

svg element: font-face: font-style

svg element: font-face: font-variant

svg element: font-face: font-weight

svg element: font-face: hanging

svg element: font-face: ideographic

svg element: font-face: mathematical

svg element: font-face: overline-position

svg element: font-face: overline-thickness

svg element: font-face: panose-1

svg element: font-face: slope

svg element: font-face: stemh

svg element: font-face: stemv

svg element: font-face: strikethrough-position

svg element: font-face: strikethrough-thickness

svg element: font-face: underline-position

svg element: font-face: underline-thickness

svg element: font-face: unicode-range

svg element: font-face: units-per-em

svg element: font-face: v-alphabetic

svg element: font-face: v-hanging

svg element: font-face: v-ideographic

svg element: font-face: v-mathematical

svg element: font-face: widths

svg element: font-face: x-height

svg element: font: horiz-adv-x

svg element: font: horiz-origin-x

svg element: font: horiz-origin-y

svg element: font: vert-adv-y

svg element: font: vert-origin-x

svg element: font: vert-origin-y