![]() Then, scroll the page for a few seconds, and stop the recording. While in the DevTools, go to the Performance panel, and click on the record button. I used Google Chrome DevTools to create the above recording. Generated frames during a few seconds of scrollingĪnd as you can see, each frame was displayed for 16.7ms (60 fps). The image below shows the sequential frames produced and displayed during a few seconds of scrolling. When you scroll through a page, the browser displays off-screen areas of the document as you scroll down (or up). Of course, a frame stays on the screen if there's no change. These changes could be as simple as adding or removing a element or changing the styles of a button.īased on W3C frame timing guidelines, the web browser has to be able to display sixty frames per second (60 fps). In fact, they are sequential images displayed rapidly to give us a perception of motion or simply reflect a change.Įvery time JavaScript code changes the page, an area in the previous image is invalidated, and the browser draws a new one. Scrolling, pinch zooming, text selection, and even hovering over a button are technically animations and work similarly. We watch various motions every time we're on a web page.Īnd it's not only JavaScript or CSS animations that I'm talking about. We recommend this program with reservations.What if I told you that web pages were interactive animations played back by your web browser? Overall, we think that DuckCapture has a lot of potential, but we'll probably stick to other utilities that reliably work for us.ĭuckCapture installs and uninstalls without issues. There are workarounds-we were able to upload our captures to Minus and then save them to our computer-but that's obviously not how we'd prefer to do things. The program has no Help file to speak of, so we weren't able to take any troubleshooting steps. This is obviously a major problem for a screen-capture utility, and one that we're at a loss to explain. A search of our machine indicated that we hadn't inadvertently saved them to some obscure directory they had just vanished. We tried saving them as different file types and in different locations, but when we went to open them, they weren't there. Try as we might, we could not successfully save any of our screen captures. Ostensibly, users can also save their captures as images, but that's where we ran into problems. Once the capture is done, users can annotate it, copy it to the clipboard, print it, or even share it on Minus, a file-sharing Web site. ![]() The scrolling feature is especially cool click on a long Web page that you want to capture, and DuckCapture will automatically scroll down and capture the entire thing. The program has a straightforward interface, with icons that users can click to select the region, window, full screen, or scrolling page that they want to capture. It works well for the most part but for us, it had one fatal flaw. Unfortunately, DuckCapture wasn't all we had hoped. DuckCapture promised to be one of the better ones we've tried, and we were especially excited about checking out its autoscroll feature. We love screen-capture utilities, perhaps because they can be both incredibly useful and a lot of fun. ![]()
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