css-fonts-5.json

{
  "spec": {
    "title": "CSS Fonts Module Level 5",
    "url": "https://drafts.csswg.org/css-fonts-5/"
  },
  "properties": {
    "font-size-adjust": {
      "name": "font-size-adjust",
      "value": "none | [ ex-height | cap-height | ch-width | ic-width | ic-height ]? [ from-font | <number> ]",
      "initial": "none",
      "appliesTo": "all elements and text",
      "inherited": "yes",
      "percentages": "N/A",
      "computedValue": "the keyword none, or a pair of a metric keyword and a <number>",
      "canonicalOrder": "per grammar",
      "animationType": "discrete if the keywords differ, otherwise by computed value type",
      "styleDeclaration": [
        "font-size-adjust",
        "fontSizeAdjust"
      ]
    }
  },
  "descriptors": {
    "font-size": [
      {
        "name": "font-size",
        "for": "@font-face",
        "value": "auto | [<number>]{1,2}",
        "initial": "normal"
      }
    ],
    "size-adjust": [
      {
        "name": "size-adjust",
        "for": "@font-face",
        "value": "<percentage [0,∞]>",
        "initial": "100%"
      }
    ],
    "ascent-override": [
      {
        "name": "ascent-override",
        "for": "@font-face",
        "value": "[ normal | <percentage [0,∞]> ]{1,2}",
        "initial": "normal"
      }
    ],
    "descent-override": [
      {
        "name": "descent-override",
        "for": "@font-face",
        "value": "[ normal | <percentage [0,∞]> ]{1,2}",
        "initial": "normal"
      }
    ],
    "line-gap-override": [
      {
        "name": "line-gap-override",
        "for": "@font-face",
        "value": "[ normal | <percentage [0,∞]> ]{1,2}",
        "initial": "normal"
      }
    ],
    "superscript-position-override": [
      {
        "name": "superscript-position-override",
        "for": "@font-face",
        "value": "[ normal | from-font | <percentage> ]{1,2}",
        "initial": "normal"
      }
    ],
    "subscript-position-override": [
      {
        "name": "subscript-position-override",
        "for": "@font-face",
        "value": "[ normal | from-font | <percentage> ]{1,2}",
        "initial": "normal"
      }
    ],
    "superscript-size-override": [
      {
        "name": "superscript-size-override",
        "for": "@font-face",
        "value": "[ normal | from-font | <percentage [0,∞]> ]{1,2}",
        "initial": "normal"
      }
    ],
    "subscript-size-override": [
      {
        "name": "subscript-size-override",
        "for": "@font-face",
        "value": "[ normal | from-font | <percentage [0,∞]> ]{1,2}",
        "initial": "normal"
      }
    ]
  },
  "valuespaces": {
    "<font-format>": {
      "value": "[<string> | woff | truetype | opentype | woff2 | embedded-opentype | collection | svg]"
    },
    "<font-technology>": {
      "value": "[features(<font-feature-technology>) | variations | color(<color-font-technology>) | palettes | incremental ]"
    },
    "<font-feature-technology>": {
      "value": "[opentype | aat | graphite]"
    },
    "<color-font-technology>": {
      "value": "[COLRv0 | COLRv1 | SVG | sbix | CBDT ]"
    }
  }
}