| { |
| "api": { |
| "BeforeUnloadEvent": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/API/BeforeUnloadEvent", |
| "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#the-beforeunloadevent-interface", |
| "tags": [ |
| "web-features:beforeunload" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "30" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": "1.24" |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "1.5" |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "4" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "7" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": { |
| "version_added": "3.0" |
| }, |
| "webview_android": { |
| "version_added": "≤37" |
| }, |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| }, |
| "returnValue": { |
| "__compat": { |
| "mdn_url": "https://developer.mozilla.org/docs/Web/API/BeforeUnloadEvent/returnValue", |
| "spec_url": "https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-beforeunloadevent-returnvalue", |
| "support": { |
| "chrome": [ |
| { |
| "version_added": "119" |
| }, |
| { |
| "version_added": "30", |
| "version_removed": "119", |
| "partial_implementation": true, |
| "notes": "Before Chrome 119, an empty string incorrectly activated the confirmation dialog." |
| } |
| ], |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": false |
| }, |
| "edge": { |
| "version_added": "12" |
| }, |
| "firefox": { |
| "version_added": "1.5" |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": "9" |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "7" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": { |
| "version_added": "3.0" |
| }, |
| "webview_android": { |
| "version_added": "≤37" |
| }, |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": true |
| } |
| } |
| }, |
| "user_interaction": { |
| "__compat": { |
| "description": "User interaction required for dialog box", |
| "tags": [ |
| "web-features:beforeunload" |
| ], |
| "support": { |
| "chrome": { |
| "version_added": "60" |
| }, |
| "chrome_android": "mirror", |
| "deno": { |
| "version_added": false |
| }, |
| "edge": "mirror", |
| "firefox": { |
| "version_added": "44" |
| }, |
| "firefox_android": "mirror", |
| "ie": { |
| "version_added": false |
| }, |
| "oculus": "mirror", |
| "opera": "mirror", |
| "opera_android": "mirror", |
| "safari": { |
| "version_added": "11" |
| }, |
| "safari_ios": "mirror", |
| "samsunginternet_android": "mirror", |
| "webview_android": "mirror", |
| "webview_ios": "mirror" |
| }, |
| "status": { |
| "experimental": false, |
| "standard_track": true, |
| "deprecated": false |
| } |
| } |
| } |
| } |
| } |
| } |
