says: if this “media query” is true, show the image with a 100vw width.For example, a device with a device-pixel-ratio of 1.5 is free to use either the 1x or 2x image, depending on what it knows about its capabilities, the network, etc. The srcset and sizes list is a hint to browsers, not a command.Old browsers will just use of course, so you’d use something like image.currentSrc || image.src to handle all cases. Check currentSrc in JavaScript to see what’s chosen by the browser. Think of, sizes and srcset attributes as overriding the src of the.This is good for accessibility as there is just one traditional place for your alternate text, and it’s great for fallback content in old browsers, which just show the element. The Opera House in Oslo at night Things to keep in mindīefore you start looking at the different examples though, here are a couple of things to keep in mind: When creating these examples, I had this night shot of the Oslo Opera house in my head - it might be useful for your reference. In the examples below, we’re referring to these questions with the keywords sizes, dpi, mime and art, respectively, and then for each combination of answers, we show a snippet of example code with a short explanation. Do I want to serve different art depending on certain contextual factors?.Do I want to serve images with different mime types to browsers that support them?.Do I want to optimize for high- dpi screens?.Do I want my image sizes to change depending on my responsive design rules?.Four questionsīefore you start using responsive images in your design, you always have to answer the following four questions: To help you match your requirements to the responsive image syntax, we’ve prepared this article full of examples. The new element can be verbose and confusing, because it solves a range of use cases. The element and a couple of new attributes for the element are behind a flag in Chromium 37 and shipping in Chromium 38 (so coming soon in Opera), in Firefox Nightly and are being implemented in WebKit (although it remains to be seen if Apple will ship it in the next version of Safari). Finally, true responsive images are becoming a reality on the web - in pure HTML, without convoluted hacks.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |