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Your Very Own Component Library @slexaxton
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What’s a Component Library?
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Why write one at all?
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Alex Sexton’s List of CSS Facts definitely true
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CSS Fact 1 Once you write a line of CSS, it can never be deleted.
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extremely useful styles
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CSS Fact 2 Preprocessors are great, as long as you know exactly what they output.
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ಠ_ಠ
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CSS Fact 3 No two people write CSS in a similar way.
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CSS Fact 4 You cannot test CSS.
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CSSish Fact 5 You cannot upgrade to a new version of bootstrap without an animal sacrifice.
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Deleting & Testing go hand in hand
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Component Libraries are well tested & highly reusable
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Me on a good day
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Me on a normal day
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Use your best days to build up components that you can use mindlessly on your worst days
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Keyboard Accessibility
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Responsiveness™
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Screenreader Accessibility
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:focus states
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:active:hover:focus states
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It turns this…
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(crappy clay mario)
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into this…
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(sweet lego mario)
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Documentation & Code Samples built in
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Consistency for users
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Bonus: consistency for your crappy internal apps too
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How Can I Make One?
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How Can I Make One that’s better than just using Bootstrap?
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Choose a preprocessor
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KFCSS
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SUIT CSS
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Add your own checks!
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what color are these?
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works every time
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CIEDE2000
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You can test CSS!
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:hover —> .pseudo-hover
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Every combination of state
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a failing test
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abstraction.
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deleting code is too hard
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Changing a component means you have to go find every. single. use. in. every. app.
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abstraction.
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i thought this was JSConf?!
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Turn all your CSS Components into JS Application Components
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never use your component library directly
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avoid this, in general
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Auto generated
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“living” style guide
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Deleting code?
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upgrading?
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Flexbox grid has the same class names as the Bootstrap grid, but uses flexbox
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90%
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10%
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Gracias! @slexaxton