One exception to Rule 2 is icons and small logos, which should retain their width and height attributes if you want them to be progressively enhanced: Consider SVG for hero textĪ non-scaling-stroke line has been applied to this speech bubble so it will not change in width when the viewport is resized Amelia Bellamy-Royds has written an excellent article on scaling SVG (opens in new tab). Note that, in order to keep things concise and clear, the code samples in the rest of this article don't include these changes. This will become the padding-bottom value for the SVG, 'propping' it open enough in IE to display the SVG in its correct aspect ratio: In addition to the preserveAspectRatio attribute, IE needs a little more guidance to preserve the correct scaling of the image: take the width of the SVG ( 365 in this case), divide it by the height ( 525) and multiply the result by 100 per cent. In that case, the SVG code needs a little more treatment for IE: In addition, SVG images are an extra HTTP request for the browser.įor these and other reasons, SVG is increasingly used inline. SVG images work well in general production, but have limited interactivity: most browsers will ignore interactivity and animation inside an SVG placed on a page as an. We can force IE9-11 to display the image correctly using the CSS attribute selector: img For IE 9-11, we have a few issues to address. That's true if we count Microsoft Edge as a modern browser. Rule 2 mentioned that correctly optimised SVGs are fully responsive in modern browsers. The same code can be integrated locally as a gulp or Grunt task (opens in new tab). Typically, you can save around 20 to 80 per cent in file size. Whatever tool you use to create your SVG content, it's still worthwhile processing its output through a tool like SVGOMG (opens in new tab), which will trim the code markedly. Optimise and minify SVG outputĪ combination of intelligent hand-editing and post-production optimisation can reduce SVG file sizes markedly Instead, you can follow the suggestions laid out in the third golden rule. If you're processing a lot of SVGs, or are in a rush, you don't need to complete this step by hand. This makes the SVG fully responsive in modern browsers. The only required code at the start of most SVG files is the following: įor our purposes, the most important aspect is the removal of the width and height attributes that most applications include automatically. Most apps add a lot of proprietary, unnecessary code in their SVG export. Alternatively, for detailed work I'd suggest a plugin like Astute Graphics' VectorScribe. If you're given vector files that do not follow this rule, don't worry – most vector art applications have a 'simplify' option you can use to reduce the number of points in an element without changing its shape. Many new designers assume more points is better, when the reverse is actually true: a few points, placed well, provide greater control over an element, while also reducing file size. Similarly, draw vector shapes using as few points as possible. This extreme precision is entirely unnecessary, and only adds to code bloat and file size, so it's better to truncate it at this point. SVG doesn't think in integers, so a vector point can have a value of 1.45882721px. Responsiveness and performance are closely related, so set the decimal precision to be no more than two points. Instead, leave at least 2px clear wherever the edge of the canvas comes close to an element. Antialiasing will still be applied to the SVG, and cutting it too close may also crop out the antialiasing. We use a free component for optimization SVGO.At the same time, don't crop the canvas area to the exact edges of elements. So if you want to get a small plus in search engines - you should reduce the size of your SVG, and we offer an easy way to do it without extra work. This can include the editor's metadata, comments, hidden items, default values or non-optimal values, and other things that can be safely removed or converted without affecting the result of SVG rendering.Īnd if you use similar SVGs on your web server, you probably know what the speed of downloading the site is and have seen in the recommendations the need to do file minification, including this applies to SVG files. SVG files, especially those exported from various editors, usually contain a lot of redundant and useless information. Questions & Answers Q: What can I do with this service? We only collect data about impersonal visitors. We do not need your e-mail address, name, location or any other personal data.
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