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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