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If you can't understand something in the article please elaborate. The window.onload ensures all the elements are loaded and are available for document.getElementById ('my_iframe') to fetch them. How to check an image is loaded or not in VueJS ? All Right Reserved. Page Load Time in TypeScript - c-sharpcorner.com First, create an image element after the document has been fully loaded by placing the code inside the event handler of the windows load event. A window is opened. This can be used for various purposes like checking for cookies or setting the correct version of the page depending on the user browser. Using a single target attribute value and reusing it in links is much more user resources friendly as it only creates one single secondary window, which is recycled. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The window.onload method is triggered when the page is entirely loaded on the browser (as well as all images, style, scripts, and CDN). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. As DOMContentLoaded waits for scripts, it now waits for styles before them as well. To handle the load event, you register an event listener using the addEventListener() method: Or use the onload property of the window object: If you maintain a legacy system, you may find that the load event handler is registered in of the body element of the HTML document, like this: Its a good practice to use the addEventListener() method to assign the onload event handler whenever possible. Why do small African island nations perform better than African continental nations, considering democracy and human development? The window creation and the loading of the referenced resource are done asynchronously. I plan to develop rich Html/Js webresources with UCI lookalike controls. Modern browsers offer a popup-blocking feature. The onbeforeunload event occurs when a document is about to be unloaded. There are cases when we are not sure whether the document is ready or not. Alert inside code function Window.onload". window | Cypress Documentation How do you run JavaScript script through the Terminal. JavaScript onload - javatpoint To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Heres a document with