![]() ( reference)Įven those proxy browsers support SVG. Blocking technology can either automatically or offer to block custom fonts.(More on the issues with icon font accessibility from Seren D.) For instance, one that applies a font better for people with dyslexia. Some people force their own fonts over yours, for example in a user stylesheet or a browser extension specifically for applying custom styles.So even if you try to feature detect, it may fail. Proxy browsers like Opera Mini or UC Browser don’t support at all, even though they sometimes report that they do.If the browser supports it, it displays it. Or that emoji might even overrule your glyphs! ![]() Plus, if you try and do something clever like map icons to “Private Use Area” of unicode and the font fails, it may do something really weird like show an unexpected emoji, because the environment you’re in uses that same area for emoji. Weird Failures Icon FontĪn icon font might fail because 1) it’s being loaded cross-domain without the proper CORS headers and Firefox doesn’t like that 2) for any reason, the font file fails to load (network hiccup, server failure, etc) 3) There is some weird Chrome bug that dumps the and shows a fallback font instead 4) Surprising browser doesn’t support failures are pretty common for a variety of reasons. See how the pseudo element box isn’t quite where the glyph actually is. Then the pseudo elements display type affects if those properties have an effect or not. The icons are inserted via pseudo element, and it depends on line-height, vertical-align, letter-spacing, word-spacing, how the font glyph is designed (does it naturally have space around it? does it have kerning information?). It can be frustrating to position a font icon. The big win for inline SVG here is probably multi-color icons. You have all the same CSS control as with a font, but better, because you can 1) control individual parts of a multi-part icon and 2) use SVG-specific CSS like stroke properties. You can control the size (via font-size), color, shadows, rotation, etc. In a recent personal example, while converting some icons from fonts to SVG on CodePen, some of the font icons were noticeably less sharp than the ones I converted over. Can lead to icons not being as sharp as you might expect. Icon Fontīrowsers consider it text, so the icons are anti-aliased as such. There are big advantages to vector icons: resizable up and down without losing quality, extra sharp on retina displays, and small file size among them. Two of those options are using inline SVG and using icon fonts. If the icons will be vector images (much more common these days), you have some options. If you know the icons need to be raster images, then you’ll likely be using CSS sprites. If you’re building an icon system for a site, you have some options.
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