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Your CSS is a Mess from SmartWeb
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snookca
September 24, 2013
Programming
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210
Your CSS is a Mess from SmartWeb
As presented at SmartWeb Conference in Bucharest, Romania
snookca
September 24, 2013
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Transcript
YOUR CSS IS A MESS
None
None
1 person.
None
4 designers.
5 developers.
1 team.
1 project.
None
30 designers.
5 prototypers.
200 engineers.
multiple teams.
multiple projects.
CSS is easy.
None
None
li { }
oat: left padding: 3px 50px; margin: 0;
.block { display:block !important; } .inline { display:inline !important; }
.hide { display:none !important; } .s-none { margin:0 !important; } .s { margin:10px !important; } .ss { margin:20px !important; } .sr { margin-right:10px !important; } .p-none { padding:0 !important; } .p { padding:10px !important; } .pp { padding:20px !important; } .pt { padding-top:10px !important; } .w-auto { width:auto !important; }
None
.layout_1_2 #blogList .pageitem .statusBar {} .layout_1_2 #blogList .pageitem .statusBar .status,
#blogList .pageitem .statusBar .status .status1 { } .layout_1_2 #blogList .pageitem .statusBar .status { } .layout_1_2 #blogList .pageitem .statusBar .status .status1 { } .layout_1_2 #blogList .pageitem .statusBar .status .status1 a { } .layout_1_2 #blogList .pageitem .statusBar .status .status1 .sep {}
.layout_1_2 #blogList .pageitem .statusBar {} .layout_1_2 #blogList .pageitem .statusBar .status,
#blogList .pageitem .statusBar .status .status1 { } .layout_1_2 #blogList .pageitem .statusBar .status { } .layout_1_2 #blogList .pageitem .statusBar .status .status1 { } .layout_1_2 #blogList .pageitem .statusBar .status .status1 a { } .layout_1_2 #blogList .pageitem .statusBar .status .status1 .sep {}
#nav-header ul li { float: left; ... } #nav-content ul
li { float: left; ... }
#comments .comment .meta .authorname {} #comments .comment .meta .commentnumber a
{}
#comments .comment .meta .authorname {} #comments .comment .meta .commentnumber a
{}
None
None
None
Scalable and Modular Architecture for CSS
SMACSS
3 Considerations
3 Categorization Naming Convention Decouple HTML/CSS
1 Categorization
Categorization • Base • Layout • Module • State •
Theme
Base
html { background-color: #FFF; font-family: Arial, Helvetica, sans-serif; font-size: 14px;
} body { margin: 0; padding: 0; } h1, h2, h3 { margin: 1em 0; }
Layout
None
Sidebar Content Header
None
None
Module
Customized List Button Tabs
None
None
None
None
None
None
None
Sub-modules
Large Search Dark Small
None
None
None
Sub-components
None
None
State
Active State Default State Disabled State Default State
Theme
None
None
None
Have your CSS (and HTML)... Do one thing and one
thing only
http://snk.ms/1r The Single Responsibility Theory
<div class="grid"> <div class="col module">...</div> </div>
.grid {} .col { float:left; } .col:nth-child(2n) { clear:left; }
.module { display:inline-block; }
<div class="grid"> <div class="col"> <div class="module">...</div> </div> </div>
<ul class="grid"> <li class="module">...</li> </ul>
.grid {} .grid > li { float:left; } .grid >
li:nth-child(2n) { clear:left; } .module { display:inline-block; }
<ul class="grid"> <li> <div class="module">...</div> </li> </ul>
<ul class="grid"> <li> {{item}} </li> </ul>
<li class="module">...</li> <div class="module">...</div>
Categorization is about Isolation
2 Naming Convention
Naming Convention Naming convention clari es intent
Use Class over ID Don’t use a grenade to dig
a hole when a shovel will do.
Specificity Inline ID Class (pseudo-classes and attribute selectors) Element (pseudo-
elements) style="..." #article .article :hover [attr=val] a : rst-child
Specificity Inline ID Class (pseudo-classes and attribute selectors) Element (pseudo-
elements) style="..." #article .article :hover [attr=val] a : rst-child
a { color: #039; } .subdued { color: #666; }
#cancel { color: #900; } <a href="...">Link</a> <a href="..." class="subdued">Link</a> <a href="..." id="cancel">Link</a> <a href="..." id="cancel" class="subdued">Link</a>
None
a { color: #039; } .subdued { color: #666 !important;
} #cancel { color: #900; } <a href="...">Link</a> <a href="..." class="subdued">Link</a> <a href="..." id="cancel">Link</a> <a href="..." id="cancel" class="subdued">Link</a>
Specificity Buster! !important
Specificity Buster! !important
a { color: #039; } .subdued, #cancel.subdued { color: #666;
} #cancel { color: #900; } <a href="...">Link</a> <a href="..." class="subdued">Link</a> <a href="..." id="cancel">Link</a> <a href="..." id="cancel" class="subdued">Link</a>
a { color: #039; } .subdued { color: #666; }
.cancel { color: #900; } <a href="...">Link</a> <a href="..." class="subdued">Link</a> <a href="..." id="cancel" class="cancel">Link</a> <a href="..." id="cancel" class="subdued">Link</a>
.btn {} .btn-large {} .btn-small {} .btn-default {} .btn-search {}
.modal {} .modal-large .modal-header {} .modal-body {} .modal-footer {}
None
.btn {} .is-btn-active {} .is-btn-disabled {}
.modulename .modulename-submodule .modulename-subcomponent No hyphens Always a root node No
hyphens No difference from submodule
.module-name .module-name--submodule .module-name__subcomponent allows for hyphens Always a root node
Alternatives underscores hyphens
.moduleName .moduleName-subModule .moduleName--subComponent camelCase Alternatives double hyphen single hyphen
Naming Convention • Pick a system that works for you
and your team • Be consistent • Consider: • Root node • Sub-modules • Sub-components
3 Decoupling CSS from HTML
.nav { margin: 0; padding: 0; list-style: none; } .nav
li { float: left; } .nav li a { display: block; padding: 5px 10px; background-color: blue; }
<ul class="nav"> <li><a href="/">Home</a></li> <li><a href="/products">Products</a></li> <li><a href="/contact">Contact Us</a></li> </ul>
<ul class="nav"> <li><a href="/">Home</a></li> <li><a href="/products">Products</a> <ul> <li><a href="/products/shoes">Shoes</a></li> <li><a
href="/products/jackets">Jackets</a></li> </ul> </li> <li><a href="/contact">Contact Us</a></li> </ul>
.nav ul { margin: 0; padding:0; list-style:none; } .nav li
li { float: none; } .nav li li a { padding: 2px; background-color: red; }
.nav { margin: 0; padding: 0; list-style: none; } .nav
> li { float: left; } .nav > li > a { display: block; padding: 5px 10px; background-color: blue; }
.menu { margin: 0; padding: 0; list-style: none } .menu
> li > a { display: block; padding: 2px; background-color: red; }
Please. Use child selectors
<div class="box"> <h2>Sites I Like</h2> <ul> <li><a href="http://www.smartwebconf.com/">SmartWeb</a></li> <li><a href="http://smacss.com/">SMACSS</a></li>
</ul> </div>
.box { border: 1px solid #333; } .box h2 {
margin: 0; padding: 5px 10px; border-bottom: 1px solid #333; background-color: #CCC; } .box ul { margin: 10px; }
<div class="box"> <h2>Sites I Like</h2> <ul> <li><a href="http://www.smartwebconf.com/">SmartWeb</a></li> <li><a href="http://smacss.com/">SMACSS</a></li>
</ul> </div> <div class="box"> <h2>About Us</h2> <p>The Fancy Pants Company is all about fancy pants.</p> </div> <div class="box"> <h2>Sponsored By</h2> <div><img src="http://example.com/img.png" alt="..."></div> </div>
.box { border: 1px solid #333; } .box h2 {
margin: 0; padding: 5px 10px; border-bottom: 1px solid #333; background-color: #CCC; } .box ul, .box p, .box div { margin: 10px; }
.box { border: 1px solid #333; } .box h2 {
margin: 0; padding: 5px 10px; border-bottom: 1px solid #333; background-color: #CCC; } .box-body { margin: 10px; }
<div class="box"> <h2>Sites I Like</h2> <ul class="box-body"> <li><a href="http://www.smartwebconf.com/">SmartWeb</a></li> <li><a
href="http://smacss.com/">SMACSS</a></li> </ul> </div> <div class="box"> <h2>About Us</h2> <p class="box-body">The Fancy Pants Company is all about fancy pants.</p> </div> <div class="box"> <h2>Sponsored By</h2> <div class="box-body"><img src="..." alt="..."></div> </div>
when the HTML can’t or won’t be predictable Apply a
class
Or make the html predictable
<div class="box"> <h2>Sites I Like</h2> <div class="box-body"> <ul> <li><a href="http://www.smartwebconf.com/">SmartWeb</a></li>
<li><a href="http://smacss.com/">SMACSS</a></li> </ul> </div> </div> <div class="box"> <h2>About Us</h2> <div class="box-body"> <p>The Fancy Pants Company is all about fancy pants.</p> </div> </div> <div class="box"> <h2>Sponsored By</h2> <div class="box-body"><img src="..." alt="..."></div> </div>
What does it mean?
Shift your thinking
Don’t code CSS for the page. Code it for the
system.
State-based Design
State-based Design • A layout or module style • Sub-modules
• JavaScript-driven states • Pseudo-class states • Media query states
CSS Panic http://snk.ms/15
.enemys { z-index:3; position:absolute; top:0px; left:0; width:49px; height:93px; display:block; -webkit-appearance:
button; -moz-appearance: button; background-position:0px 0px; background-repeat:no-repeat; -webkit-animation-iteration-count:infinite cursor:pointer; opacity:0.9; border:none;
.enemys { z-index:3; position:absolute; top:0px; left:0; width:49px; height:93px; display:block; -webkit-appearance:
button; -moz-appearance: button; background-position:0px 0px; background-repeat:no-repeat; -webkit-animation-iteration-count:infinite cursor:pointer; opacity:0.9; border:none;
.enemys:checked{ overflow:hidden; -webkit-animation-name: none; -webkit-pointer-events: none; pointer-events: none; opacity:0; }
.enemys:checked{ overflow:hidden; -webkit-animation-name: none; -webkit-pointer-events: none; pointer-events: none; opacity:0; }
3 Categorization Naming Convention Decouple HTML/CSS
http://smacss.com/ Thanks!