block confirm function before unload · Issue #28 · jacobbuck/react- beforeunload · GitHub
javascript - Is it possible to display a custom message in the beforeunload popup? - Stack Overflow
Prevent leaving the page using plain JavaScript
Easy fix for: Blocked attempt to show a 'beforeunload' confirmation panel for a frame that never had a user gesture since its load
Javascript tips: list EVERY event that exists in the browser
javascript - Is it possible to display a custom message in the beforeunload popup? - Stack Overflow
Alert before unload
DOM: the unload and beforeunload events | Tyler Jones
Buttons – Design Lance
Sure you want to leave?—browser beforeunload event - DEV Community
Window.confirm() - Web APIs | MDN
Page Lifecycle API - Chrome Developers
Electron browser hangs/errors on apps with window.onbeforeunload alerts · Issue #2118 · cypress-io/cypress · GitHub
Javscript Tutorial:How to display an alert when the user Enters or leaves you page! - YouTube
How to create a custom dialog in React to show before user leave | Shubham Verma
Electron browser hangs/errors on apps with window.onbeforeunload alerts · Issue #2118 · cypress-io/cypress · GitHub
![Javascript] 關閉瀏覽器或分頁事件: beforeunload](https://1.bp.blogspot.com/-iGAFjyHIe1k/XS8yGo75d8I/AAAAAAAAQpE/q8nE_tj9JxoFi6nsPQTMMZ6MPtmCbJcJgCLcBGAs/w1200-h630-p-k-no-nu/carbon.png "Javascript] 關閉瀏覽器或分頁事件: beforeunload")
Javascript] 關閉瀏覽器或分頁事件: beforeunload
Electron browser hangs/errors on apps with window.onbeforeunload alerts · Issue #2118 · cypress-io/cypress · GitHub
javascript - Is it possible to display a custom message in the beforeunload popup? - Stack Overflow
![ROOMY - NATION: [JavaScript] Blocked alert() during beforeunload](https://1.bp.blogspot.com/-apQJH_M8h9A/WVtm6apCgCI/AAAAAAAABvM/h-8bJvIe3XETmetHTdiCHSg7OnppWxr6gCK4BGAYYCw/w1200-h630-p-k-no-nu/block.png "ROOMY - NATION: [JavaScript] Blocked alert() during beforeunload")