{
  "api": {
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      "__compat": {
        "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver",
        "support": {
          "chrome": {
            "version_added": "51"
          },
          "chrome_android": {
            "version_added": "51"
          },
          "edge": {
            "version_added": "15"
          },
          "firefox": [
            {
              "version_added": "55"
            },
            {
              "version_added": "53",
              "version_removed": "55",
              "flags": [
                {
                  "type": "preference",
                  "name": "dom.IntersectionObserver.enabled",
                  "value_to_set": "true"
                }
              ]
            }
          ],
          "ie": {
            "version_added": false
          },
          "opera": {
            "version_added": "38"
          },
          "opera_android": {
            "version_added": "41"
          },
          "safari": {
            "version_added": "12.1"
          },
          "safari_ios": {
            "version_added": "12.2"
          },
          "samsunginternet_android": {
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          },
          "webview_android": {
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          }
        },
        "status": {
          "experimental": true,
          "standard_track": true,
          "deprecated": false
        }
      },
      "IntersectionObserver": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/IntersectionObserver",
          "description": "<code>IntersectionObserver()</code> constructor",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": "38"
            },
            "safari": {
              "version_added": "12.1"
            },
            "safari_ios": {
              "version_added": "12.2"
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        },
        "document_as_root": {
          "__compat": {
            "description": "<code>root</code> option can be a <code>Document</code>",
            "support": {
              "chrome": {
                "version_added": "81"
              },
              "chrome_android": {
                "version_added": "81"
              },
              "edge": {
                "version_added": "81"
              },
              "firefox": {
                "version_added": "76"
              },
              "firefox_android": {
                "version_added": false
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "68"
              },
              "opera_android": {
                "version_added": "58"
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": false
              },
              "webview_android": {
                "version_added": "81"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      },
      "disconnect": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/disconnect",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15",
              "notes": "Available since <a href='https://developer.microsoft.com/microsoft-edge/platform/status/intersectionobserver/'>Windows Insider Preview Build 14986</a>"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": true
            },
            "safari": {
              "version_added": null
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "observe": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/observe",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": true
            },
            "safari": {
              "version_added": "12.1"
            },
            "safari_ios": {
              "version_added": "12.2"
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "root": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/root",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": true
            },
            "safari": {
              "version_added": "12.1"
            },
            "safari_ios": {
              "version_added": "12.2"
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "rootMargin": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/rootMargin",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": true
            },
            "safari": {
              "version_added": "12.1",
              "notes": "<code>rootMargin</code> does not work with <code>&lt;iframe&gt;</code>s."
            },
            "safari_ios": {
              "version_added": "12.2",
              "notes": "<code>rootMargin</code> does not work with <code>&lt;iframe&gt;</code>s."
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "takeRecords": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/takeRecords",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15",
              "notes": "Available since <a href='https://developer.microsoft.com/microsoft-edge/platform/status/intersectionobserver/'>Windows Insider Preview Build 14986</a>"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": true
            },
            "safari": {
              "version_added": null
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "thresholds": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/thresholds",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": true
            },
            "safari": {
              "version_added": "12.1"
            },
            "safari_ios": {
              "version_added": "12.2"
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      },
      "unobserve": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/API/IntersectionObserver/unobserve",
          "support": {
            "chrome": {
              "version_added": "51"
            },
            "chrome_android": {
              "version_added": "51"
            },
            "edge": {
              "version_added": "15",
              "notes": "Available since <a href='https://developer.microsoft.com/microsoft-edge/platform/status/intersectionobserver/'>Windows Insider Preview Build 14986</a>"
            },
            "firefox": [
              {
                "version_added": "55"
              },
              {
                "version_added": "53",
                "version_removed": "55",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.IntersectionObserver.enabled",
                    "value_to_set": "true"
                  }
                ]
              }
            ],
            "ie": {
              "version_added": false
            },
            "opera": {
              "version_added": true
            },
            "safari": {
              "version_added": "12.1"
            },
            "safari_ios": {
              "version_added": "12.2"
            },
            "samsunginternet_android": {
              "version_added": "5.0"
            },
            "webview_android": {
              "version_added": "51"
            }
          },
          "status": {
            "experimental": true,
            "standard_track": true,
            "deprecated": false
          }
        }
      }
    }
  }
}