{ "api": { "CloseEvent": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/API/CloseEvent", "support": { "chrome": { "version_added": "13" }, "chrome_android": { "version_added": "18" }, "edge": { "version_added": "12" }, "firefox": { "version_added": "8", "notes": [ "Prior to Firefox 12, the close code CLOSE_NORMAL was used when the channel was closed due to an unexpected error or unspecified error condition.", "Prior to Firefox 8, the WebSocket close event was sent to the listener as a simple event." ] }, "firefox_android": { "version_added": "8" }, "ie": { "version_added": "10" }, "opera": { "version_added": "12.1" }, "opera_android": { "version_added": "12.1" }, "safari": { "version_added": "6" }, "safari_ios": { "version_added": "6" }, "samsunginternet_android": { "version_added": "1.0" }, "webview_android": { "version_added": "≤37" } }, "status": { "experimental": false, "standard_track": true, "deprecated": false } }, "CloseEvent": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/API/CloseEvent/CloseEvent", "description": "CloseEvent() constructor", "support": { "chrome": { "version_added": null }, "chrome_android": { "version_added": null }, "edge": { "version_added": null }, "firefox": { "version_added": "8" }, "firefox_android": { "version_added": "8" }, "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": false } } }, "initCloseEvent": { "__compat": { "mdn_url": "https://developer.mozilla.org/docs/Web/API/CloseEvent/initCloseEvent", "support": { "chrome": { "version_added": false }, "chrome_android": { "version_added": false }, "edge": { "version_added": "12", "version_removed": "79" }, "firefox": { "version_added": "8", "version_removed": "41" }, "firefox_android": { "version_added": "8", "version_removed": "41" }, "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": false, "deprecated": false } } } } } }