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CHRIS COYIER
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mycockpit.club
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2014
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SLIDE TO SEEM TIMELY AND RELEVANT
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Sharp at any size or resolution
Small in file size
SVG is
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Styleable & Responsive - you can apply CSS
Scriptable - shapes can be in the DOM
Systematic - easy to build an icon system
Animateable - in many comfortable ways
Interactive - links! hovers! games!
Accessible - in all the right ways
SVG is
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Big Promises / Can’t Use
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Nope. You can use SVG now
and it’s pretty dang easy.
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Well-supported
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Even if you need to go deeper, it’s not
that bad. We’ll get into that in a bit.
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HEY
that looks like
HTML
(It’s XML)
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SVG syntax can be learned!
Unlike any other image format.
(You don’t “learn” JPG, unless you’re like Rain Man.)
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SVG can be made from
essentially anything “vector”.
.eps / .pdf / .ai / .whatever
open in Illustrator, Save As .svg
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“Scaleable Vector Graphics”
SVG can be made from
essentially anything “vector”.
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SVG will never replace
raster graphics.
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Rasterfarian GET IT?!
(This image would be very bad at being vector.)
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wpapcommunity.com/site/index.php/gallery/musisi-jazz/bob-marley-rastaman-2048
(This image would be very good at being vector.)
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Todd Parker’s Chart
https://docs.google.com/presentation/d/1CNQLbqC0krocy_fZrM5fZ-YmQ2JgEADRh3qR6RbOOGk/edit#slide=id.p
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How do you get
SVG to use?
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1
Learn the SVG syntax and
hand-craft them.
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Basic Shapes
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2
Make your own images in a
vector editing program
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(p.s. you can copy and paste SVG out of Illustrator CC)
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Illustrator
$19.99 / month
Extremely robust
Lots of training/tutorials available
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Sketch
$99
Modern take on design software
Great for web
Great exporting
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WebCode
$39.99
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iDraw
$24.99
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Inkscape
Free
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3
Go snag some vector stuff
off the internet.
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• Adjust colors
• Change artboard size
• Remove cruft
• Save it
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http://creativedroplets.com/export-svg-for-the-web-with-illustrator-cc/
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How to Use SVG
LIKE, ON WEBPAGES YA TEAMSTERS
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SVG-as-img
HTML
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SVG-as-img
HTML
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.clover {
background: url(clover.svg);
}
Great way to support gradients in IE 9.
Compass can automatically do that for you.
www.sitepoint.com/getting-started-svg-gradients/
SVG as background-image
CSS
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html5hub.com/#i.5cx78814yheb6u
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AddType image/svg+xml .svg .svgz
.htaccess
css-tricks.com/snippets/htaccess/serve-svg-correct-content-type/
content-type fix
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Because SVG can be resized worry-free, you
probably will resize them most of the time.
http://blog.froont.com/9-basic-principles-of-responsive-web-design/
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img {
max-width: 100%;
height: auto;
}
CSS
img[src$=".svg"] {
max-width: auto;
width: 100%;
height: auto;
}
Don’t get bigger than the
container element.
Also, don’t scale up.
Don’t get bigger than the
container element.
Scale up if you need to.
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.horse {
background: url(horse.svg);
background-size: cover;
}
CSS
Firefox used to have an issue with blurring SVG when resizing, but not anymore since v24.
Fill the entire background of
this element no matter what.
Scale up if you have to.
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You can put
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Three Big Advantages to
Using Inline SVG:
1) Shapes are in the DOM: CSS Styling! JavaScript stuff!
2) No additional HTTP Request (it’s like a data URI, but better)
3) You can use define once and use in multiple places
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SVG Templating
Using inline
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Sites need a system for icons.
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2014.cssconf.com
codepen.io/elrumordelaluz/pen/dhwLi
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Even better, let’s get that block of SVG
out of the HTML entirely.
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defs.svg
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browser caching!
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IE (any version) won’t allow with an external source.
Jonathan Neal has a fixer-upper script.
(XHRs in the guts so it’s like straight up inline SVG.)
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Using instead of
is even better!
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Or, do add viewBox if
you want/need
width: auto;
behavior.
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.specific-icon {
background: url('svg.svg#svgView(viewBox(0,0,48,41))');
}
Fragment Identifiers
Fragment Identifiers
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This is the idea of
SVG Sprites
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1) Vector (awesome)
2) No background-position craziness
3) More CSS control (i.e. SVG-specific, @media, etc)
4) All the other advantages of inline SVG (accessible, multiple links, scriptable)
5) Fallbacks are possible
It’s the same idea,
only way better because:
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codepen.io/chriscoyier/pen/mhaFy
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Media Queries in CSS + SVG
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All this stuff is possible on inline SVG.
You get some advantages of SVG with ![]()
or
background-image, but not as many.
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SVG vs. Icon Fonts
Cagematch!
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THE ANCIENT PAST
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Icon Font SVG
Vector yup (but anti-aliasing…) yup
CSS Control some (single color) better
Positioning die XXX murder good
Weird Failures* yup less
Semantics none / ::before better
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Guess which one I like?
Tip: it’s the one that isn’t icon fonts.
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If you’re going to use
icon fonts, read this.
It goes into how it can
be done perfectly* in
regards to accessibility,
browser support, and
failures.
*95%
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Build Tools
Don’t freak out.
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Optimizing SVG
1. Removing meta junk
2. Simplifying shapes
3. Reducing crazy precision
4. Removing hidden elements
5. Removing whitespace
youtube.com/watch?v=iVzW3XuOm7E&feature=youtu.be
youtube.com/watch?v=1AdX8odLC8M&feature=youtu.be
Kyle Foster has great videos
detailing SVG optimization
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Raster images
are a grid of
pixels so it’s
easy to
understand
they have an
intrinsic width
and height.
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SVG has a
Viewport and viewBox
Viewport is the size of the element. Think how the browser
window is the viewport for the whole site but an iframe has it’s
own smaller viewport. Likewise, SVG has it’s own viewport.
viewBox is an attribute on
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Dealing with
Fallbacks
e.g. dealing with IE 8 and Android 2.3
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Remember, one kind of fallback
is nothing.
Like if you’re using an icon to enhance a word.
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svgeezy.init(false, "png");
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svgeezy.init(false, 'png');
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codepen.io/chriscoyier/pen/jnsIr
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codepen.io/chriscoyier/pen/jnsIr
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It works, but it requests two images in
non-supporting browsers.
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… but, SVG is more well supported than the responsive images stuff is.
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.my-element {
background-image: url(fallback.png);
background-image:
linear-gradient(transparent, transparent),
url(image.svg);
}
Fallback for CSS background-image
This works because it combines multiple backgrounds and old-syntax gradients,
thus it works for Android 2.x where multiple backgrounds alone did not.
You could use Modernizr too, but if you just need it for this, it would be overkill.
pauginer.tumblr.com/post/36614680636/invisible-gradient-technique
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Also, background is generally
decorative and non-vital to content, so no
fallback is often acceptable.
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Supporting (most) browsers
Just leaves alone
IE 9-11
Ajax’s in
IE 6-8
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Animating SVG
Let us count the ways.
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1. SVG Syntax (“SMIL”)
2. With CSS @keyframes / transitions
3. With JavaScript
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SVG Filters
& Blend Modes
The OG of cool web effects.
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.an-event-apart {
-webkit-filter: url(#blur);
filter: url(#blur);
}
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SVG Filters
You can use CSS filters on SVG, but SVG has its own special filters too.
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Accessible SVG
Thankfully it ain’t that hard.
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1. Use SVG
2. Use Inline SVG
3. Provide a and aria-labeledby
4. Provide a <desc> and aria-labeledby
5. Use <text>
6. Make links focusable (if parts)
7. Use ARIA roles
8. Create alternatives
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http://css-tricks.com/svg-text-typographic-designs/
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@chriscoyier