![]() ![]() Setting this attribute to an empty string ( alt="") indicates that this image is not a key part of the content (it's decoration or a tracking pixel), and that non-visual browsers may omit it from rendering. For these reasons and others, provide a useful value for alt whenever possible. In these cases, the browser may replace the image with the text in the element's alt attribute. The image is invalid or an unsupported type.The user chooses not to display images (saving bandwidth, privacy reasons).Non-visual browsers (such as those used by people with visual impairments).There are a number of situations in which a browser might not display images, such as: Note: Browsers do not always display images. SVG remains the recommended format for images that must be drawn accurately at different sizes. WebP (Web Picture format) - Excellent choice for both images and animated imagesįormats like WebP and AVIF are recommended as they perform much better than PNG, JPEG, GIF for both still and animated images.Use for images that must be drawn accurately at different sizes. SVG (Scalable Vector Graphics) - Vector image format.PNG (Portable Network Graphics) - Good choice for lossless compression of still images (slightly better quality than JPEG).JPEG (Joint Photographic Expert Group image) - Good choice for lossy compression of still images (currently the most popular).GIF (Graphics Interchange Format) - Good choice for simple images and animations.AVIF (AV1 Image File Format) - Good choice for both images and animated images due to high performance.APNG (Animated Portable Network Graphics) - Good choice for lossless animation sequences (GIF is less performant).The image file formats that are most commonly used on the web are: Note: The Image file type and format guide provides comprehensive information about image formats and their web browser support. ![]() Allowing cross-origin use of images and canvas.HTML table advanced features and accessibility.From object to iframe - other embedding technologies.Assessment: Structuring a page of content. ![]() Another subproject of ours provides the loading animations in CSS format. For user convenience the images can be sorted to include only animations that are available in SVG format and by other options. Most of the non-3D images are available in 3 formats - GIF, APNG and SVG. project provides more than 1000 different animations, split into 18 categories including most widely used loading spinners, horizontal bars, animated custom texts and others. It's still not very popular due to it's size in bytes comparing to all other formats. At the moment the APNG format is supported by most major browsers now. There is also APNG (or animated PNG) format which appeared because of the GIF limitations, but was denied by a number of comminities in the beginning. The animation objects are usually used in GIF format which is very popular due to it's history, but the loading images in SVG and CSS format are getting more and more poplular because of infinite size scalability - they can have any dimensions and relatively smaller size in bytes. Being an critically important part of web-site and application design and usability, mostly the animations are used to show that something is loading on the background (e.g. Loading GIF or, so called loader gif is an animation that indicates a loading process on a web-site or an application. ![]()
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