{
  "css": {
    "types": {
      "length": {
        "__compat": {
          "description": "`<length>`",
          "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/Reference/Values/length",
          "spec_url": "https://drafts.csswg.org/css-values/#lengths",
          "tags": [
            "web-features:width-height"
          ],
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": "mirror",
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": "1"
            },
            "firefox_android": "mirror",
            "ie": {
              "version_added": "3"
            },
            "oculus": "mirror",
            "opera": {
              "version_added": "3.5"
            },
            "opera_android": {
              "version_added": "10.1"
            },
            "safari": {
              "version_added": "1"
            },
            "safari_ios": "mirror",
            "samsunginternet_android": "mirror",
            "webview_android": {
              "version_added": "1"
            },
            "webview_ios": "mirror"
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "Q": {
          "__compat": {
            "description": "`Q` unit",
            "tags": [
              "web-features:q-unit"
            ],
            "support": {
              "chrome": {
                "version_added": "63"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "49"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "13.1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "cap": {
          "__compat": {
            "description": "`cap` unit",
            "tags": [
              "web-features:cap"
            ],
            "support": {
              "chrome": {
                "version_added": "118"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "97"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "17.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "ch": {
          "__compat": {
            "description": "`ch` unit",
            "tags": [
              "web-features:ch"
            ],
            "support": {
              "chrome": {
                "version_added": "27"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1",
                "notes": [
                  "From Firefox 1 to Firefox 3, `ch` was the width of the _M_ character.",
                  "From Firefox 1 to Firefox 3, `ch` did not work with [`border-width`](https://developer.mozilla.org/docs/Web/CSS/border-width) and [`outline-width`](https://developer.mozilla.org/docs/Web/CSS/outline-width) CSS properties."
                ]
              },
              "firefox_android": {
                "version_added": "4"
              },
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "7"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "container_query_length_units": {
          "__compat": {
            "description": "Container query length units `cqw`, `cqh`, `cqi`, `cqb`, `cqmin`, `cqmax`",
            "tags": [
              "web-features:container-queries"
            ],
            "support": {
              "chrome": {
                "version_added": "105"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "110"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "16"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "em": {
          "__compat": {
            "description": "`em` unit",
            "tags": [
              "web-features:em-unit"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "3"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "3.5"
              },
              "opera_android": {
                "version_added": "10.1"
              },
              "safari": {
                "version_added": "1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": {
                "version_added": "1"
              },
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "ex": {
          "__compat": {
            "description": "`ex` unit",
            "tags": [
              "web-features:ex"
            ],
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "1"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "4"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "3.5"
              },
              "opera_android": {
                "version_added": "10.1"
              },
              "safari": {
                "version_added": "1"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "ic": {
          "__compat": {
            "description": "`ic` unit",
            "tags": [
              "web-features:ic"
            ],
            "support": {
              "chrome": {
                "version_added": "106"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "97"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "15.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "lh": {
          "__compat": {
            "description": "`lh` unit",
            "spec_url": "https://drafts.csswg.org/css-values/#lh",
            "tags": [
              "web-features:lh"
            ],
            "support": {
              "chrome": {
                "version_added": "109"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "120"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "16.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "rcap": {
          "__compat": {
            "description": "`rcap` unit",
            "spec_url": "https://drafts.csswg.org/css-values/#rcap",
            "tags": [
              "web-features:rcap"
            ],
            "support": {
              "chrome": {
                "version_added": "118"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "17.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "rch": {
          "__compat": {
            "description": "`rch` unit",
            "spec_url": "https://drafts.csswg.org/css-values/#rch",
            "tags": [
              "web-features:rch"
            ],
            "support": {
              "chrome": {
                "version_added": "111"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "17.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "rem": {
          "__compat": {
            "description": "`rem` unit",
            "tags": [
              "web-features:rem"
            ],
            "support": {
              "chrome": {
                "version_added": "4"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "3.6"
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "11.6"
              },
              "opera_android": {
                "version_added": "12"
              },
              "safari": {
                "version_added": "5"
              },
              "safari_ios": {
                "version_added": "4"
              },
              "samsunginternet_android": "mirror",
              "webview_android": {
                "version_added": "2"
              },
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "rex": {
          "__compat": {
            "description": "`rex` unit",
            "spec_url": "https://drafts.csswg.org/css-values/#rex",
            "tags": [
              "web-features:rex"
            ],
            "support": {
              "chrome": {
                "version_added": "111"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "17.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "ric": {
          "__compat": {
            "description": "`ric` unit",
            "spec_url": "https://drafts.csswg.org/css-values/#ric",
            "tags": [
              "web-features:ric"
            ],
            "support": {
              "chrome": {
                "version_added": "111"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "147"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "17.2"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "rlh": {
          "__compat": {
            "description": "`rlh` unit",
            "spec_url": "https://drafts.csswg.org/css-values/#rlh",
            "tags": [
              "web-features:rlh"
            ],
            "support": {
              "chrome": {
                "version_added": "111"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "120"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "16.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "vb": {
          "__compat": {
            "description": "`vb` unit",
            "tags": [
              "web-features:viewport-unit-variants"
            ],
            "support": {
              "chrome": {
                "version_added": "108"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "101"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "15.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "vh": {
          "__compat": {
            "description": "`vh` unit",
            "tags": [
              "web-features:viewport-units"
            ],
            "support": {
              "chrome": {
                "version_added": "20"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "19",
                "notes": "Starting with version 21, viewport-percentage lengths are invalid in `@page`."
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "20"
              },
              "opera_android": "mirror",
              "safari": {
                "version_added": "6"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "vi": {
          "__compat": {
            "description": "`vi` unit",
            "tags": [
              "web-features:viewport-unit-variants"
            ],
            "support": {
              "chrome": {
                "version_added": "108"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "101"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "15.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "viewport_percentage_units_dynamic": {
          "__compat": {
            "description": "`dvb`, `dvh`, `dvi`, `dvmax`, `dvmin`, `dvw` units",
            "tags": [
              "web-features:viewport-unit-variants"
            ],
            "support": {
              "chrome": {
                "version_added": "108"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "101"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "15.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "viewport_percentage_units_large": {
          "__compat": {
            "description": "`lvb`, `lvh`, `lvi`, `lvmax`, `lvmin`, `lvw` units",
            "tags": [
              "web-features:viewport-unit-variants"
            ],
            "support": {
              "chrome": {
                "version_added": "108"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "101"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "15.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "viewport_percentage_units_small": {
          "__compat": {
            "description": "`svb`, `svh`, `svi`, `svmax`, `svmin`, `svw` units",
            "tags": [
              "web-features:viewport-unit-variants"
            ],
            "support": {
              "chrome": {
                "version_added": "108"
              },
              "chrome_android": "mirror",
              "edge": "mirror",
              "firefox": {
                "version_added": "101"
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "15.4"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "vmax": {
          "__compat": {
            "description": "`vmax` unit",
            "tags": [
              "web-features:viewport-units"
            ],
            "support": {
              "chrome": {
                "version_added": "26"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "16"
              },
              "firefox": {
                "version_added": "19",
                "notes": "Starting with version 21, viewport-percentage lengths are invalid in `@page`."
              },
              "firefox_android": "mirror",
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "7"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": {
                "version_added": "1.5"
              },
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "vmin": {
          "__compat": {
            "description": "`vmin` unit",
            "tags": [
              "web-features:viewport-units"
            ],
            "support": {
              "chrome": {
                "version_added": "26"
              },
              "chrome_android": "mirror",
              "edge": [
                {
                  "version_added": "12"
                },
                {
                  "alternative_name": "vm",
                  "version_added": "12"
                }
              ],
              "firefox": {
                "version_added": "19",
                "notes": "Starting with version 21, viewport-percentage lengths are invalid in `@page`."
              },
              "firefox_android": "mirror",
              "ie": [
                {
                  "version_added": "10"
                },
                {
                  "alternative_name": "vm",
                  "version_added": "9"
                }
              ],
              "oculus": "mirror",
              "opera": "mirror",
              "opera_android": "mirror",
              "safari": {
                "version_added": "7"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "vw": {
          "__compat": {
            "description": "`vw` unit",
            "tags": [
              "web-features:viewport-units"
            ],
            "support": {
              "chrome": {
                "version_added": "20"
              },
              "chrome_android": "mirror",
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "19",
                "notes": "Starting with version 21, viewport-percentage lengths are invalid in `@page`."
              },
              "firefox_android": "mirror",
              "ie": {
                "version_added": "9"
              },
              "oculus": "mirror",
              "opera": {
                "version_added": "20"
              },
              "opera_android": "mirror",
              "safari": {
                "version_added": "6"
              },
              "safari_ios": "mirror",
              "samsunginternet_android": "mirror",
              "webview_android": "mirror",
              "webview_ios": "mirror"
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}