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Second, assign the onload event handler to the image. rev2023.3.3.43278. But we can use another event onbeforeunload. However, not sure how I should use it with react. In general, however, I'd avoid assigning functions directly to onload in favour of using addEventListener (with compatibility libraries if I needed to support older browsers). Window.onload function we can use to perform some task as soon as the page finishes loading. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. We can do something there that doesn't involve a delay, like closing related popup windows. Specifies the distance in pixels from the left side of the work area as defined by the user's operating system where the new window will be generated. Let's say we gather data about how the page is used: mouse clicks, scrolls, viewed page areas, and so on. Event Handlers Here are the Event handlers mention below You can find more information in the chapter Fetch API. While using W3Schools, you agree to have read and accepted our, , ,