{
  "html": {
    "elements": {
      "iframe": {
        "__compat": {
          "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Element/iframe",
          "support": {
            "chrome": {
              "version_added": "1"
            },
            "chrome_android": {
              "version_added": true
            },
            "edge": {
              "version_added": "12"
            },
            "firefox": {
              "version_added": true,
              "notes": "The <code>resize</code> CSS property doesn't have any effect on this element due to <a href='https://bugzil.la/680823'>bug 680823</a>."
            },
            "firefox_android": {
              "version_added": true,
              "notes": "The <code>resize</code> CSS property doesn't have any effect on this element due to <a href='https://bugzil.la/680823'>bug 680823</a>."
            },
            "ie": {
              "version_added": true
            },
            "opera": {
              "version_added": true
            },
            "opera_android": {
              "version_added": true
            },
            "safari": {
              "version_added": true,
              "notes": "Safari has a <a href='https://www.quirksmode.org/bugreports/archives/2005/02/hidden_iframes.html'>bug</a> that prevents iframes from loading if the <code>iframe</code> element was hidden when added to the page. <code>iframeElement.src = iframeElement.src</code> should cause it to load the iframe."
            },
            "safari_ios": {
              "version_added": true,
              "notes": "Safari has a <a href='https://www.quirksmode.org/bugreports/archives/2005/02/hidden_iframes.html'>bug</a> that prevents iframes from loading if the <code>iframe</code> element was hidden when added to the page. <code>iframeElement.src = iframeElement.src</code> should cause it to load the iframe."
            },
            "samsunginternet_android": {
              "version_added": true
            },
            "webview_android": {
              "version_added": true
            }
          },
          "status": {
            "experimental": false,
            "standard_track": true,
            "deprecated": false
          }
        },
        "align": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "allow": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "60"
              },
              "chrome_android": {
                "version_added": "60"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": "74"
              },
              "firefox_android": {
                "version_added": false
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "47"
              },
              "opera_android": {
                "version_added": "44"
              },
              "safari": {
                "version_added": "11.1"
              },
              "safari_ios": {
                "version_added": "11.3"
              },
              "samsunginternet_android": {
                "version_added": "8.0"
              },
              "webview_android": {
                "version_added": "60"
              }
            },
            "status": {
              "experimental": true,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "allowfullscreen": {
          "__compat": {
            "support": {
              "chrome": [
                {
                  "version_added": "27"
                },
                {
                  "prefix": "webkit",
                  "version_added": "17",
                  "version_removed": "38"
                }
              ],
              "chrome_android": [
                {
                  "version_added": "27"
                },
                {
                  "prefix": "webkit",
                  "version_added": "18",
                  "version_removed": "38"
                }
              ],
              "edge": [
                {
                  "version_added": "≤79"
                },
                {
                  "prefix": "ms",
                  "version_added": "12",
                  "version_removed": "79"
                }
              ],
              "firefox": [
                {
                  "version_added": "18"
                },
                {
                  "prefix": "moz",
                  "version_added": "9"
                }
              ],
              "firefox_android": [
                {
                  "version_added": "18"
                },
                {
                  "prefix": "moz",
                  "version_added": "9"
                }
              ],
              "ie": {
                "prefix": "ms",
                "version_added": "11"
              },
              "opera": [
                {
                  "version_added": "≤15"
                },
                {
                  "prefix": "webkit",
                  "version_added": "15",
                  "version_removed": "25"
                }
              ],
              "opera_android": [
                {
                  "version_added": "≤14"
                },
                {
                  "prefix": "webkit",
                  "version_added": "14",
                  "version_removed": "25"
                }
              ],
              "safari": [
                {
                  "version_added": "7"
                },
                {
                  "prefix": "webkit",
                  "version_added": true
                }
              ],
              "safari_ios": [
                {
                  "version_added": "7"
                },
                {
                  "prefix": "webkit",
                  "version_added": true
                }
              ],
              "samsunginternet_android": [
                {
                  "version_added": "1.5"
                },
                {
                  "prefix": "webkit",
                  "version_added": "1.0",
                  "version_removed": "3.0"
                }
              ],
              "webview_android": [
                {
                  "version_added": "37"
                },
                {
                  "prefix": "webkit",
                  "version_added": "37",
                  "version_removed": "38"
                }
              ]
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "allowpaymentrequest": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": {
                "version_added": false
              },
              "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": true,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "aspect_ratio_computed_from_attributes": {
          "__compat": {
            "description": "Aspect ratio computed from <code>width</code> and <code>height</code> attributes",
            "support": {
              "chrome": {
                "version_added": "79"
              },
              "chrome_android": {
                "version_added": "79"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": [
                {
                  "version_added": "71"
                },
                {
                  "version_added": "69",
                  "version_removed": "71",
                  "flags": [
                    {
                      "type": "preference",
                      "name": "layout.css.width-and-height-map-to-aspect-ratio.enabled",
                      "value_to_set": "true"
                    }
                  ]
                }
              ],
              "firefox_android": {
                "version_added": "79"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "66"
              },
              "opera_android": {
                "version_added": "57"
              },
              "safari": {
                "version_added": "14"
              },
              "safari_ios": {
                "version_added": "14"
              },
              "samsunginternet_android": {
                "version_added": "12.0"
              },
              "webview_android": {
                "version_added": "79"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "external_protocol_urls_blocked": {
          "__compat": {
            "description": "External protocol URLs blocked",
            "support": {
              "chrome": {
                "version_added": null
              },
              "chrome_android": {
                "version_added": null
              },
              "edge": {
                "version_added": null
              },
              "firefox": {
                "version_added": "67"
              },
              "firefox_android": {
                "version_added": "67"
              },
              "ie": {
                "version_added": null
              },
              "opera": {
                "version_added": null
              },
              "opera_android": {
                "version_added": null
              },
              "safari": {
                "version_added": null
              },
              "safari_ios": {
                "version_added": null
              },
              "samsunginternet_android": {
                "version_added": null
              },
              "webview_android": {
                "version_added": null
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "frameborder": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "height": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "loading": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "76"
              },
              "chrome_android": {
                "version_added": "76"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": false
              },
              "firefox_android": {
                "version_added": false
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "63"
              },
              "opera_android": {
                "version_added": "54"
              },
              "safari": {
                "version_added": false,
                "notes": "See <a href='https://webkit.org/b/196698'>bug 196698</a>"
              },
              "safari_ios": {
                "version_added": false,
                "notes": "See <a href='https://webkit.org/b/196698'>bug 196698</a>"
              },
              "samsunginternet_android": {
                "version_added": false
              },
              "webview_android": {
                "version_added": false
              }
            },
            "status": {
              "experimental": true,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "longdesc": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "marginheight": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "marginwidth": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "name": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "referrerpolicy": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "51"
              },
              "chrome_android": {
                "version_added": "51"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": "50"
              },
              "firefox_android": {
                "version_added": "50"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "38"
              },
              "opera_android": {
                "version_added": "41"
              },
              "safari": {
                "version_added": "11.1"
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": "7.2"
              },
              "webview_android": {
                "version_added": "51"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "sandbox": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "4"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": "17"
              },
              "firefox_android": {
                "version_added": "17"
              },
              "ie": {
                "version_added": "10"
              },
              "opera": {
                "version_added": "15"
              },
              "opera_android": {
                "version_added": null
              },
              "safari": {
                "version_added": "5"
              },
              "safari_ios": {
                "version_added": "4.2"
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "sandbox-allow-downloads": {
          "__compat": {
            "description": "<code>sandbox=\"allow-downloads\"</code>",
            "support": {
              "chrome": {
                "version_added": "83"
              },
              "chrome_android": {
                "version_added": "83"
              },
              "edge": {
                "version_added": "83"
              },
              "firefox": {
                "version_added": "82"
              },
              "firefox_android": {
                "version_added": "82"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": null
              },
              "opera_android": {
                "version_added": null
              },
              "safari": {
                "version_added": false
              },
              "safari_ios": {
                "version_added": false
              },
              "samsunginternet_android": {
                "version_added": null
              },
              "webview_android": {
                "version_added": "83"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "sandbox-allow-modals": {
          "__compat": {
            "description": "<code>sandbox=\"allow-modals\"</code>",
            "support": {
              "chrome": {
                "version_added": null
              },
              "chrome_android": {
                "version_added": null
              },
              "edge": {
                "version_added": null
              },
              "firefox": {
                "version_added": "49"
              },
              "firefox_android": {
                "version_added": "49"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": null
              },
              "opera_android": {
                "version_added": null
              },
              "safari": {
                "version_added": null
              },
              "safari_ios": {
                "version_added": null
              },
              "samsunginternet_android": {
                "version_added": null
              },
              "webview_android": {
                "version_added": null
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "sandbox-allow-popups": {
          "__compat": {
            "description": "<code>sandbox=\"allow-popups\"</code>",
            "support": {
              "chrome": {
                "version_added": true
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "≤18"
              },
              "firefox": {
                "version_added": "28"
              },
              "firefox_android": {
                "version_added": "27"
              },
              "ie": {
                "version_added": null
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": null
              },
              "safari": {
                "version_added": null
              },
              "safari_ios": {
                "version_added": null
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "sandbox-allow-popups-to-escape-sandbox": {
          "__compat": {
            "description": "<code>sandbox=\"allow-popups-to-escape-sandbox\"</code>",
            "support": {
              "chrome": {
                "version_added": "46"
              },
              "chrome_android": {
                "version_added": "46"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": "49"
              },
              "firefox_android": {
                "version_added": "49"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "32"
              },
              "opera_android": {
                "version_added": "32"
              },
              "safari": {
                "version_added": null
              },
              "safari_ios": {
                "version_added": null
              },
              "samsunginternet_android": {
                "version_added": "5.0"
              },
              "webview_android": {
                "version_added": "46"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "sandbox-allow-presentation": {
          "__compat": {
            "description": "<code>sandbox=\"allow-presentation\"</code>",
            "support": {
              "chrome": {
                "version_added": "53"
              },
              "chrome_android": {
                "version_added": "53"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": "50"
              },
              "firefox_android": {
                "version_added": "50"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "40"
              },
              "opera_android": {
                "version_added": "41"
              },
              "safari": {
                "version_added": null
              },
              "safari_ios": {
                "version_added": null
              },
              "samsunginternet_android": {
                "version_added": "6.0"
              },
              "webview_android": {
                "version_added": false
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "sandbox-allow-storage-access-by-user-activation": {
          "__compat": {
            "description": "<code>sandbox=\"allow-storage-access-by-user-activation\"</code>",
            "support": {
              "chrome": {
                "version_added": false
              },
              "chrome_android": {
                "version_added": false
              },
              "edge": {
                "version_added": false
              },
              "firefox": {
                "version_added": "65",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.storage_access.enabled",
                    "value_to_set": "true"
                  }
                ]
              },
              "firefox_android": {
                "version_added": "65",
                "flags": [
                  {
                    "type": "preference",
                    "name": "dom.storage_access.enabled",
                    "value_to_set": "true"
                  }
                ]
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": false
              },
              "opera_android": {
                "version_added": false
              },
              "safari": {
                "version_added": "11.1"
              },
              "safari_ios": {
                "version_added": "11.3"
              },
              "samsunginternet_android": {
                "version_added": false
              },
              "webview_android": {
                "version_added": false
              }
            },
            "status": {
              "experimental": true,
              "standard_track": false,
              "deprecated": false
            }
          }
        },
        "sandbox-allow-top-navigation-by-user-activation": {
          "__compat": {
            "description": "<code>sandbox=\"allow-top-navigation-by-user-activation\"</code>",
            "support": {
              "chrome": {
                "version_added": "58"
              },
              "chrome_android": {
                "version_added": "58"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": "79"
              },
              "firefox_android": {
                "version_added": "79"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "45"
              },
              "opera_android": {
                "version_added": "43"
              },
              "safari": {
                "version_added": "11.1",
                "notes": "Not initially available in 11.1, but added in sub-version 13605.1.33.1.2."
              },
              "safari_ios": {
                "version_added": null
              },
              "samsunginternet_android": {
                "version_added": "7.0"
              },
              "webview_android": {
                "version_added": "58"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "scrolling": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": true
            }
          }
        },
        "src": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "srcdoc": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "20"
              },
              "chrome_android": {
                "version_added": "25"
              },
              "edge": {
                "version_added": "79"
              },
              "firefox": {
                "version_added": "25"
              },
              "firefox_android": {
                "version_added": "25"
              },
              "ie": {
                "version_added": false
              },
              "opera": {
                "version_added": "15"
              },
              "opera_android": {
                "version_added": null
              },
              "safari": {
                "version_added": "6"
              },
              "safari_ios": {
                "version_added": null
              },
              "samsunginternet_android": {
                "version_added": "1.5"
              },
              "webview_android": {
                "version_added": "37"
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        },
        "width": {
          "__compat": {
            "support": {
              "chrome": {
                "version_added": "1"
              },
              "chrome_android": {
                "version_added": true
              },
              "edge": {
                "version_added": "12"
              },
              "firefox": {
                "version_added": true
              },
              "firefox_android": {
                "version_added": true
              },
              "ie": {
                "version_added": true
              },
              "opera": {
                "version_added": true
              },
              "opera_android": {
                "version_added": true
              },
              "safari": {
                "version_added": true
              },
              "safari_ios": {
                "version_added": true
              },
              "samsunginternet_android": {
                "version_added": true
              },
              "webview_android": {
                "version_added": true
              }
            },
            "status": {
              "experimental": false,
              "standard_track": true,
              "deprecated": false
            }
          }
        }
      }
    }
  }
}