This example opens an HTML page named M圜reatedWindow.html. The first parameter contains the URL you wish to open in the new window. That variable is important because you need it to manipulate the new window.

That variable holds a reference to your new popup window. The following code creates and opens a new popup browser window that you can control: window1 = window.open('M圜reatedWindow.html', '', 'width=300, height=200') For instance, you might want site visitors to view a small popup that shows a map or table. While some sites open popups that display advertising, others use popups to display helpful information. A popup is simply a browser window that opens while you’re viewing another browser window. Popup blockers are so popular these days that many browsers build them right into their infrastructure. New to JavaScript? Visit Udemy to learn pro coding tips.

However, you can use built-in JavaScript functions to resize and reposition browser windows instantly. Imagine the chaos that could ensue if any random function could shrink your browser window to the size of a quarter. That means this event is called whenever the URL changes.Fortunately, you cannot move or resize a browser window your JavaScript code did not create. Whenever a new page is navigated history.pushState is called and page is added to the state. The history API maintains complete the navigation state. Javascript does not provide any native listener to path change (not hashchange). This works as expected (partially), whenever the page is loaded the XHR is sent, but gatsby do not reload the page while changing the URL when any blog link is clicked, so XHR is sent only once per session and not on subsequent page loads. We created a function sendTelemetry and called it on window.onload. The blog is built using gatsby, we wanted to add google analytics to this, but instead of using google tag manager, we tried to restrict what data is sent to google and in this process, we need to send XHR request on every page load. We run into a situation where we need to call a function whenever URL path changes (not the hash).

But since there is no page reload, window.onload event does not get triggered for subsequent navigation. Modern JS frameworks tend not to reload the page but manipulate DOM and change URL path for internal navigation, for performance and smooth UX.

Call javascript function on resize