Write more code and save time using our ready-made code examples. After that, a window is opened. Theoretically Correct vs Practical Notation. Example1 In this example, there is a div element with a height of 200px and a width of 200px. How do I align things in the following tabular environment? To handle the unload event, you can use the addEventListener () method: addEventListener ( 'unload', (event) => { console .log ( 'The page is unloaded' ); }); Code language: JavaScript (javascript) Or assign an event handler to the onunload property of the window object: window .onunload = (event) => { console .log ( 'The page is unloaded' ); }; If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: 
, W3Schools is optimized for learning and training. A window is opened. Popups don't have a menu toolbar, whereas new tabs use the user interface of the browser window; therefore, many users prefer tab-browsing because the interface remains stable. You are trying to call onload rather than assign an event handler. They also convey incorrect semantics to assistive technologies, like screen readers. I try this code: void' is not assignable to parameter of type 'Event'. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. url currently in the secondary window */, /* if the resource to load is different, At this point, all of the objects in the document are in the DOM, and all the images and sub-frames have finished loading. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This is used with the window element to execute a script after the webpage has completely loaded. You can also go to the search page to find another event. Heres a document with
