What is Yotube Cover Bookmarklets？

As of my last knowledge update in September 2021, there was no widely known or established concept called “YouTube Cover Bookmarklets.” However, it’s possible that this term or concept has emerged or become relevant after my last update, or it could be a niche or specialized tool or technique that isn’t widely recognized.

In general, bookmarklets are small pieces of JavaScript code that can be saved as bookmarks in your web browser. When you click on a bookmarklet, it executes the code, allowing you to perform various actions or functions on the current web page. Bookmarklets are often used to enhance or customize the functionality of websites.

If “YouTube Cover Bookmarklets” refers to a specific tool or technique that has emerged after my last update, I recommend searching for the latest information online or checking the official YouTube documentation or community forums for any developments or explanations related to this term. Additionally, you can provide more context or details about what you’re looking for, and I’d be happy to try to provide more relevant information based on my knowledge up to September 2021.

    Let’s take a look at the code for how to implement “Yotube Cover bookmarklets”：

    javascript:(function(){const%20validOrigins=%7Bbandcamp:%22https://bandcamp.com%22,instagram:%22https://instagram.com%22,mixcloud:%22https://mixcloud.com%22,soundcloud:%22https://soundcloud.com%22,youtube:%22https://youtube.com%22%7D;function%20getSoundcloudImage()%7Breturn%20document.querySelector(%22.fullHero__artwork%20.image%20span%22).style.backgroundImage.split('%22')%5B1%5D.replace(/t500x500/g,%22original%22)%7Dfunction%20getMixcloudImage()%7Breturn%20document.querySelector(%22.album-art%20img%22).srcset.split(%22,%22).pop().split(%22%20%22).shift()%7Dfunction%20getInstagramImage()%7Breturn%20document.querySelector('%5Bstyle%5E=%22padding-bottom%22%5D%20img').srcset.split(%22,%22).pop().split(%22%20%22).shift()%7Dfunction%20getYoutubeImage()%7Blet%7Bgroups:t%7D=window.location.href.match(/%5E.*((youtu.be%5C/)%7C(v%5C/)%7C(%5C/u%5C/%5Cw%5C/)%7C(embed%5C/)%7C(watch%5C?))%5C??v?=?(?%3Cid%3E%5B%5E#&?%5D*)/);return%20t.id?%60http://i3.ytimg.com/vi/$%7Bt.id%7D/maxresdefault.jpg%60:null%7Dfunction%20getBandcampImage()%7Breturn%20document.querySelector(%22#tralbumArt%20.popupImage%20img%22).src.replace(%22_16.jpg%22,%22_10.jpg%22)%7Dasync%20function%20writeToClipboard(t)%7Btry%7Bawait%20navigator.clipboard.writeText(t)%7Dcatch(t)%7Bconsole.error(t)%7D%7D(async()=%3E%7Bwindow.focus();const%20t=window.location.origin.replace(%22//www.%22,%22//%22);let%20e=%22%22;switch(t)%7Bcase%20validOrigins.instagram:e=getInstagramImage();break;case%20validOrigins.mixcloud:case%20validOrigins.wwwMixcloud:e=getMixcloudImage();break;case%20validOrigins.soundcloud:e=getSoundcloudImage();break;case%20validOrigins.youtube:e=getYoutubeImage();break;default:if(t.endsWith(%22.bandcamp.com%22))%7Be=getBandcampImage();break%7Dreturn%20void%20window.alert(%60This%20bookmarklet%20does%20not%20support%20$%7Bt%7D%60)%7De&&(await%20writeToClipboard(e),window.open(e))%7D)();})()

    How to createYotube Cover bookmarklets？

    Create a New Bookmark: In your web browser, go to the webpage where you want to create the bookmarklet. Then, right-click on your bookmarks bar and select “Add Page” or “Bookmark This Page” (the exact wording may vary depending on your browser).

    Name the Bookmark: Give your bookmarklet a descriptive name. You can name it something like “Get Window Size” or whatever you prefer.

    Edit the URL/Address: Instead of a website URL, you will enter JavaScript code into the URL field of the bookmark. for getting the window size is as follows: Copy and paste the above code into the URL field of your bookmark.

    Save the Bookmark: Click the “Save” or “Done” button to save your new bookmarklet.

    Now, whenever you want to check the size of the browser window on a webpage, simply click on the bookmarklet you just created. A popup or alert box will appear, displaying the width and height of the browser window in pixels.Please note that the exact process for creating bookmarks and using bookmarklets may vary slightly depending on your web browser. The above instructions are general guidelines and should work for most modern browsers.