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- What is Onbeforeunload in JS?
- What is the difference between Onbeforeunload and Onunload?
- How to alert a user before leaving a page in JavaScript?
- How to display warning before leaving the web page with unsaved changes using JavaScript?
What is Onbeforeunload in JS?
The beforeunload event is fired when the window, the document and its resources are about to be unloaded. The document is still visible and the event is still cancelable at this point. This event enables a web page to trigger a confirmation dialog asking the user if they really want to leave the page.
What is the difference between Onbeforeunload and Onunload?
One significant difference (other than cancelability) between the onbeforeunload and onunload is that the former is triggered for download links and the latter is not.
How to alert a user before leaving a page in JavaScript?
To make a warning alert or confirm dialog display when the user reloads the page or closes a tab using javascript, we can use window. addEventListener() and beforeunload events like the script above.
How to display warning before leaving the web page with unsaved changes using JavaScript?
How to display warning before leaving the web page with unsaved changes using JavaScript ? The onbeforeunload event handler is used for processing beforeunload events. This event is fired whenever a window is about to unload its resources.
