{
  "css": {
    "properties": {
      "align-self": {
        "flex_context": {
          "__compat": {
            "description": "Supported in Flex Layout",
            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/align-self",
            "support": {
              "chrome": [
                {
                  "version_added": "36"
                },
                {
                  "version_added": "29",
                  "partial_implementation": true,
                  "notes": "Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52."
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "21"
                }
              ],
              "chrome_android": [
                {
                  "version_added": "36"
                },
                {
                  "version_added": "29",
                  "partial_implementation": true,
                  "notes": "Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52."
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "25"
                }
              ],
              "edge": {
                "version_added": "12"
              },
              "firefox": [
                {
                  "version_added": "20",
                  "notes": "Before Firefox 27, only single-line flexbox is supported."
                },
                {
                  "version_added": "18",
                  "version_removed": "20",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "layout.css.flexbox.enabled",
                      "value_to_set": "true"
                    }
                  ]
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "49"
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "48",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "layout.css.prefixes.webkit",
                      "value_to_set": "true"
                    }
                  ]
                }
              ],
              "firefox_android": [
                {
                  "version_added": "20",
                  "notes": "Before Firefox 27, only single-line flexbox is supported."
                },
                {
                  "version_added": "18",
                  "version_removed": "20",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "layout.css.flexbox.enabled",
                      "value_to_set": "true"
                    }
                  ]
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "49"
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "48",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "layout.css.prefixes.webkit",
                      "value_to_set": "true"
                    }
                  ]
                }
              ],
              "ie": {
                "version_added": "11"
              },
              "opera": {
                "version_added": "12.1"
              },
              "opera_android": {
                "version_added": "12.1"
              },
              "safari": [
                {
                  "version_added": "9"
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "6.1"
                }
              ],
              "safari_ios": [
                {
                  "version_added": "9"
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "6.1"
                }
              ],
              "samsunginternet_android": [
                {
                  "version_added": "3.0"
                },
                {
                  "version_added": "2.0",
                  "partial_implementation": true,
                  "notes": "Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Samsung Internet 6.0."
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "1.5"
                }
              ],
              "webview_android": [
                {
                  "version_added": "37"
                },
                {
                  "version_added": "4.4",
                  "partial_implementation": true,
                  "notes": "Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52."
                },
                {
                  "prefix": "-webkit-",
                  "version_added": "≤37"
                }
              ]
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          },
          "baseline": {
            "__compat": {
              "description": "<code>baseline</code>",
              "support": {
                "chrome": {
                  "version_added": "57"
                },
                "chrome_android": {
                  "version_added": "57"
                },
                "edge": {
                  "version_added": "79"
                },
                "firefox": {
                  "version_added": "45"
                },
                "firefox_android": {
                  "version_added": "45"
                },
                "ie": {
                  "version_added": false
                },
                "opera": {
                  "version_added": "44"
                },
                "opera_android": {
                  "version_added": "43"
                },
                "safari": {
                  "version_added": false
                },
                "safari_ios": {
                  "version_added": false
                },
                "samsunginternet_android": {
                  "version_added": "7.0"
                },
                "webview_android": {
                  "version_added": "57"
                }
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "first_last_baseline": {
            "__compat": {
              "description": "<code>first baseline</code> and <code>last baseline</code>",
              "support": {
                "chrome": {
                  "version_added": "57"
                },
                "chrome_android": {
                  "version_added": "57"
                },
                "edge": {
                  "version_added": "79"
                },
                "firefox": {
                  "version_added": "52"
                },
                "firefox_android": {
                  "version_added": "52"
                },
                "ie": {
                  "version_added": false
                },
                "opera": {
                  "version_added": "44"
                },
                "opera_android": {
                  "version_added": "43"
                },
                "safari": {
                  "version_added": false
                },
                "safari_ios": {
                  "version_added": false
                },
                "samsunginternet_android": {
                  "version_added": "7.0"
                },
                "webview_android": {
                  "version_added": "57"
                }
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "left_right": {
            "__compat": {
              "description": "<code>left</code> and <code>right</code>",
              "support": {
                "chrome": {
                  "version_added": false
                },
                "chrome_android": {
                  "version_added": false
                },
                "edge": {
                  "version_added": false
                },
                "firefox": {
                  "version_added": "52"
                },
                "firefox_android": {
                  "version_added": "52"
                },
                "ie": {
                  "version_added": false
                },
                "opera": {
                  "version_added": false
                },
                "opera_android": {
                  "version_added": false
                },
                "safari": {
                  "version_added": false
                },
                "safari_ios": {
                  "version_added": false
                },
                "samsunginternet_android": {
                  "version_added": false
                },
                "webview_android": {
                  "version_added": false
                }
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "safe_unsafe": {
            "__compat": {
              "description": "<code>safe</code> and <code>unsafe</code>",
              "support": {
                "chrome": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "chrome_android": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "edge": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "firefox": {
                  "version_added": "63"
                },
                "firefox_android": {
                  "version_added": "63"
                },
                "ie": {
                  "version_added": false
                },
                "opera": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "opera_android": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "safari": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "safari_ios": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "samsunginternet_android": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                },
                "webview_android": {
                  "version_added": false,
                  "notes": "This value is recognized, but has no effect."
                }
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "start_end": {
            "__compat": {
              "description": "<code>start</code> and <code>end</code>",
              "support": {
                "chrome": {
                  "version_added": "57"
                },
                "chrome_android": {
                  "version_added": "57"
                },
                "edge": {
                  "version_added": "79"
                },
                "firefox": {
                  "version_added": "45"
                },
                "firefox_android": {
                  "version_added": "45"
                },
                "ie": {
                  "version_added": false
                },
                "opera": {
                  "version_added": "44"
                },
                "opera_android": {
                  "version_added": "43"
                },
                "safari": {
                  "version_added": false
                },
                "safari_ios": {
                  "version_added": false
                },
                "samsunginternet_android": {
                  "version_added": "7.0"
                },
                "webview_android": {
                  "version_added": "57"
                }
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          },
          "stretch": {
            "__compat": {
              "description": "<code>stretch</code>",
              "support": {
                "chrome": {
                  "version_added": "57"
                },
                "chrome_android": {
                  "version_added": "57"
                },
                "edge": {
                  "version_added": "79"
                },
                "firefox": {
                  "version_added": "52"
                },
                "firefox_android": {
                  "version_added": "52"
                },
                "ie": {
                  "version_added": false
                },
                "opera": {
                  "version_added": "44"
                },
                "opera_android": {
                  "version_added": "43"
                },
                "safari": {
                  "version_added": false
                },
                "safari_ios": {
                  "version_added": false
                },
                "samsunginternet_android": {
                  "version_added": "7.0"
                },
                "webview_android": {
                  "version_added": "57"
                }
              },
              "status": {
                "experimental": false,
                "standard_track": true,
                "deprecated": false
              }
            }
          }
        },
        "grid_context": {
          "__compat": {
            "description": "Supported in Grid Layout",
            "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/align-self",
            "support": {
              "chrome": {
                "version_added": "57"
              },
              "chrome_android": {
                "version_added": "52"
              },
              "edge": {
                "version_added": "16"
              },
              "firefox": {
                "version_added": "52"
              },
              "firefox_android": {
                "version_added": "52"
              },
              "ie": {
                "prefix": "-ms-",
                "version_added": "10",
                "partial_implementation": true,
                "notes": "IE10 and 11 have the property -ms-grid-column-align which acts in a similar way to align-self."
              },
              "opera": {
                "version_added": "44"
              },
              "opera_android": {
                "version_added": "43"
              },
              "safari": {
                "version_added": "10.1"
              },
              "safari_ios": {
                "version_added": "10.3"
              },
              "samsunginternet_android": {
                "version_added": "6.2"
              },
              "webview_android": {
                "version_added": "57"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}