{
  "api": {
    "Headers": {
      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers",
        "support": {
          "chrome": [
            {
              "version_added": "42"
            },
            {
              "version_added": "41",
              "flags": [
                {
                  "type": "preference",
                  "name": "Experimental Web Platform Features"
                }
              ]
            }
          ],
          "chrome_android": [
            {
              "version_added": "42"
            },
            {
              "version_added": "41",
              "flags": [
                {
                  "type": "preference",
                  "name": "Experimental Web Platform Features"
                }
              ]
            }
          ],
          "edge": {
            "version_added": "≤18"
          },
          "firefox": [
            {
              "version_added": "39"
            },
            {
              "version_added": "34",
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.fetch.enabled"
                }
              ]
            }
          ],
          "firefox_android": {
            "version_added": "44"
          },
          "ie": {
            "version_added": false
          },
          "opera": [
            {
              "version_added": "29"
            },
            {
              "version_added": "28",
              "flags": [
                {
                  "type": "preference",
                  "name": "Experimental Web Platform Features"
                }
              ]
            }
          ],
          "opera_android": [
            {
              "version_added": "29"
            },
            {
              "version_added": "28",
              "flags": [
                {
                  "type": "preference",
                  "name": "Experimental Web Platform Features"
                }
              ]
            }
          ],
          "safari": {
            "version_added": "10.1"
          },
          "safari_ios": {
            "version_added": false
          },
          "samsunginternet_android": {
            "version_added": "4.0"
          },
          "webview_android": {
            "version_added": "42"
          }
        },
        "status": {
          "experimental": false,
          "standard_track": true,
          "deprecated": false
        }
      },
      "Headers": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/Headers",
          "description": "<code>Headers()</code> constructor",
          "support": {
            "chrome": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "chrome_android": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "edge": [
              {
                "version_added": "≤79"
              },
              {
                "version_added": "≤79",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "firefox": [
              {
                "version_added": "39"
              },
              {
                "version_added": "34",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.fetch.enabled"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "opera_android": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": ""
                  }
                ]
              }
            ],
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": {
              "version_added": "42"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "append": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/append",
          "support": {
            "chrome": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "chrome_android": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "edge": {
              "version_added": "14"
            },
            "firefox": [
              {
                "version_added": "39"
              },
              {
                "version_added": "34",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.fetch.enabled"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "opera_android": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": {
              "version_added": "42"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "delete": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/delete",
          "support": {
            "chrome": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "chrome_android": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "edge": {
              "version_added": "14"
            },
            "firefox": [
              {
                "version_added": "39"
              },
              {
                "version_added": "34",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.fetch.enabled"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "opera_android": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": {
              "version_added": "42"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "entries": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/entries",
          "support": {
            "chrome": {
              "version_added": "45"
            },
            "chrome_android": {
              "version_added": "45"
            },
            "edge": {
              "version_added": "16"
            },
            "firefox": {
              "version_added": "44"
            },
            "firefox_android": {
              "version_added": "44"
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": "32"
            },
            "opera_android": {
              "version_added": "32"
            },
            "safari": {
              "version_added": null
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "45"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "get": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/get",
          "support": {
            "chrome": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "chrome_android": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "edge": {
              "version_added": "14"
            },
            "firefox": [
              {
                "version_added": "52",
                "notes": "Prior to Firefox 52, <code>get()</code> only returned the first value in the specified header, with <code>getAll()</code> returning all values. From 52 onwards, <code>get()</code> now returns all values and <code>getAll()</code> has been deleted."
              },
              {
                "version_added": "39"
              },
              {
                "version_added": "34",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.fetch.enabled"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "opera_android": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "safari": {
              "version_added": "10.1"
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": {
              "version_added": "42"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "getAll": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/getAll",
          "support": {
            "chrome": {
              "version_added": "42",
              "version_removed": "60"
            },
            "chrome_android": {
              "version_added": "42",
              "version_removed": "60"
            },
            "edge": {
              "version_added": "≤18",
              "version_removed": "79"
            },
            "firefox": [
              {
                "version_added": "39",
                "version_removed": "52"
              },
              {
                "version_added": "34",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.fetch.enabled"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": "29",
              "version_removed": "47"
            },
            "opera_android": {
              "version_added": "29",
              "version_removed": "44"
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": {
              "version_added": "42",
              "version_removed": "60"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": false,
            "deprecated": true
          }
        }
      },
      "has": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/has",
          "support": {
            "chrome": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "chrome_android": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "edge": {
              "version_added": "14"
            },
            "firefox": [
              {
                "version_added": "39"
              },
              {
                "version_added": "34",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.fetch.enabled"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "opera_android": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": {
              "version_added": "42"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "keys": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/keys",
          "support": {
            "chrome": {
              "version_added": "45"
            },
            "chrome_android": {
              "version_added": "45"
            },
            "edge": {
              "version_added": "16"
            },
            "firefox": {
              "version_added": "44"
            },
            "firefox_android": {
              "version_added": "44"
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": "32"
            },
            "opera_android": {
              "version_added": "32"
            },
            "safari": {
              "version_added": null
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "45"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "lexicographical_sorting": {
        "__compat": {
          "description": "Lexicographical sorting, and values from duplicate header names combined when iterated.",
          "support": {
            "chrome": {
              "version_added": null
            },
            "chrome_android": {
              "version_added": null
            },
            "edge": {
              "version_added": null
            },
            "firefox": {
              "version_added": "44"
            },
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": "28"
            },
            "opera_android": {
              "version_added": null
            },
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": null
            },
            "webview_android": {
              "version_added": null
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "set": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/set",
          "support": {
            "chrome": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "chrome_android": [
              {
                "version_added": "42"
              },
              {
                "version_added": "41",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "edge": {
              "version_added": "14"
            },
            "firefox": [
              {
                "version_added": "39"
              },
              {
                "version_added": "34",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.fetch.enabled"
                  }
                ]
              }
            ],
            "firefox_android": {
              "version_added": false
            },
            "ie": {
              "version_added": false
            },
            "opera": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "opera_android": [
              {
                "version_added": "29"
              },
              {
                "version_added": "28",
                "flags": [
                  {
                    "type": "preference",
                    "name": "Experimental Web Platform Features"
                  }
                ]
              }
            ],
            "safari": {
              "version_added": false
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "4.0"
            },
            "webview_android": {
              "version_added": "42"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "values": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/Headers/values",
          "support": {
            "chrome": {
              "version_added": "45"
            },
            "chrome_android": {
              "version_added": "45"
            },
            "edge": {
              "version_added": "16"
            },
            "firefox": {
              "version_added": "44"
            },
            "firefox_android": {
              "version_added": "44"
            },
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": "32"
            },
            "opera_android": {
              "version_added": "32"
            },
            "safari": {
              "version_added": null
            },
            "safari_ios": {
              "version_added": false
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "45"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}