The favicon.ico must be placed in the project root, as shown in the example above. If the picture has blurred, you need a designer who will draw the favicon manually in a graphics editor. This can be checked manually by compressing your favicon from 32x32 to 16x16. So, when do you need to create a 16x16 favicon.ico? Do this when a 32×32 favicon gets blurry when compressed. Therefore, browsers that understand the 16x16 size will be able to reduce 32x32 to the required size. ico container is dynamic and can be resized on the fly. This is true and not true at the same time. Most online sources claim that you need a 16×16 favicon.ico. To help with that, Icon Horse must cache the resulting list of icons and the resulting chosen icon.Pay attention to two details: size and location. So when dealing with a slow server, it's possible that loading that icon could take quite a long time. If all this fails, generate a JPEG file on the fly as a fallback.Merge all these icons together in a list and sort them based on a best to worst criteria, while also making sure the icons themselves are reachable (and don't 404 Not Found).Parse the HTML and do a query lookup to get relevant icons and the manifest file.Consider that to serve an icon, one needs to: Also, for some use cases (such as React Native), SVG format icons would not work out of the box, and needed something like react-native-svg to get them to load, so I stuck to raster formats only (for the first version at least, I plan to open up SVGs as well in the future via a query parameter).Īnd finally, pulling all this content is time intensive. So I made the assumption that the best icon to serve would be the most high fidelity image. Since my service was making icons available to all who wanted them, there was no telling the different use cases they would be serving. I never wanted to serve a broken image or a timeout. I knew there was going to be even more edge cases I hadn't considered in the future, so it was very important to build in functionality for fallback images. The list of difficulties goes on – for example one prominent clothing retailer's icon is simply not loadable because they have a nasty bug in their site's redirects and headers meaning you cannot simply redirect: 'follow' your way to the HTML page, but must chain one request after the other manually. Some don't specify a MIME type or a file extension so you have to parse the actual image to know what you're dealing with. Some sites have 404 Not Found errors on their icons. Some sites have completely broken DNS or server issues (like infinite redirect loops). Some sites don't even bother to tell you the size (in pixels) of the icons. Some sites have only a few of the icons from the spec. When building a product to fetch favicons, you should expect no mercy. When it comes to standards, the web is pure chaos. I decided it would be nice to render a small icon next to the links, as a way to tease the content to my users:Īfter hunting for a good way to fetch icons for a given link, I found one that was a JSON API endpoint, but I wasn't very satisfied with this solution – I did not want to complicate my life by using it, since I still needed to write code to figure out the best icon to display from the list I got back.Īlso, I did not find a single service that provided fallbacks, or an icon that would be shown if the site is unreachable or if it had no icons at all.Īfter all, Gravatar does this very well for email addresses, and it was strange that no one had done this with favicons yet! So I got to work. Many meetings have links to relevant places, such as video conferencing apps (especially since the COVID-19 situation has moved many people to remote work). I'm currently working on a tool called Meeting Canary, from which a note-taking interface is displayed for a given calendar meeting. A separate Web App Manifest file which is specified in the.Today, there are three main places to look for icons: Now while technically a shortcut icon, they are usually lumped in with favicons in general internet terminology and also during the process to create them. But since favicons tended to be low resolution, a number of diverging standards came about and added these on both Android and iOS. Since then, a number of new circumstances have come up requiring new types of icons – one example is the advent of the smart phone, which allowed people to save a website shortcut on their home screen. Enter fullscreen mode Exit fullscreen mode
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