css-values.json

{
  "spec": {
    "title": "CSS Values and Units Module Level 4",
    "url": "https://www.w3.org/TR/css-values-4/"
  },
  "properties": {},
  "descriptors": {},
  "valuespaces": {
    "<url>": {
      "value": "url( <string> <url-modifier>* ) | src( <string> <url-modifier>* )"
    },
    "<ratio>": {
      "value": "<number [0,∞]> [ / <number [0,∞]> ]?"
    },
    "<position>": {
      "value": "[ [ left | center | right ] || [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]? | [ [ left | right ] <length-percentage> ] && [ [ top | bottom ] <length-percentage> ] ]"
    },
    "<attr()>": {
      "value": "attr( <wq-name> <attr-type>? , <declaration-value>?)"
    },
    "<attr-type>": {
      "value": "string | url | ident | color | number | percentage | length | angle | time | frequency | flex | <dimension-unit>"
    },
    "<calc()>": {
      "value": "calc( <calc-sum> )"
    },
    "<min()>": {
      "value": "min( <calc-sum># )"
    },
    "<max()>": {
      "value": "max( <calc-sum># )"
    },
    "<clamp()>": {
      "value": "clamp( <calc-sum>#{3} )"
    },
    "<round()>": {
      "value": "round( <rounding-strategy>?, <calc-sum>, <calc-sum> )"
    },
    "<mod()>": {
      "value": "mod( <calc-sum>, <calc-sum> )"
    },
    "<rem()>": {
      "value": "rem( <calc-sum>, <calc-sum> )"
    },
    "<sin()>": {
      "value": "sin( <calc-sum> )"
    },
    "<cos()>": {
      "value": "cos( <calc-sum> )"
    },
    "<tan()>": {
      "value": "tan( <calc-sum> )"
    },
    "<asin()>": {
      "value": "asin( <calc-sum> )"
    },
    "<acos()>": {
      "value": "acos( <calc-sum> )"
    },
    "<atan()>": {
      "value": "atan( <calc-sum> )"
    },
    "<atan2()>": {
      "value": "atan2( <calc-sum>, <calc-sum> )"
    },
    "<pow()>": {
      "value": "pow( <calc-sum>, <calc-sum> )"
    },
    "<sqrt()>": {
      "value": "sqrt( <calc-sum> )"
    },
    "<hypot()>": {
      "value": "hypot( <calc-sum># )"
    },
    "<log()>": {
      "value": "log( <calc-sum>, <calc-sum>? )"
    },
    "<exp()>": {
      "value": "exp( <calc-sum> )"
    },
    "<abs()>": {
      "value": "abs( <calc-sum> )"
    },
    "<sign()>": {
      "value": "sign( <calc-sum> )"
    },
    "<calc-sum>": {
      "value": "<calc-product> [ [ '+' | '-' ] <calc-product> ]*"
    },
    "<calc-product>": {
      "value": "<calc-value> [ [ '*' | '/' ] <calc-value> ]*"
    },
    "<calc-value>": {
      "value": "<number> | <dimension> | <percentage> | <calc-constant> | ( <calc-sum> )"
    },
    "<calc-constant>": {
      "value": "e | pi | infinity | -infinity | NaN"
    },
    "<length-percentage>": {
      "value": "[ <length> | <percentage> ]"
    },
    "<frequency-percentage>": {
      "value": "[ <frequency> | <percentage> ]"
    },
    "<angle-percentage>": {
      "value": "[ <angle> | <percentage> ]"
    },
    "<time-percentage>": {
      "value": "[ <time> | <percentage> ]"
    }
  }
}