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Polymer Google Developer Group Hackathon.

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Creating Reusable Elements +AddyOsmani @addyosmani

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Apps should be composed of reusable, responsive & testable elements.

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Examples

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Bad Reusable

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Bad Reusable

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Not

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Not

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Today you might write an

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Element Docs Tests

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Element Create a component we’ve all written before.

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Tabs http://drbl.in/bAsu http://drbl.in/esYL

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PILE ON THE JAVASCRIPT

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https://www.flickr.com/photos/ darkismus/4179361946

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https://www.flickr.com/photos/ goodspeed/2669719176

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http://goo.gl/lKk7iT

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Tabs using web components

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! Tab 1 Tab 2 Tab 3 HTML

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! Tab 1 Tab 2 Tab 3 HTML

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Building a tabs element

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Start with github.com/PolymerLabs/seed-element

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Download Boilerplate

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/development /seed-element /tests .bowerrc bower.json demo.html index.html README.md seed-element.css seed-element.html Unzip it locally Workspace Element

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/development /seed-element /tests .bowerrc bower.json demo.html index.html README.md seed-element.css seed-element.html Boilerplate files Rename for my-tabs

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/development /my-tabs /tests .bowerrc bower.json demo.html index.html README.md my-tabs.css my-tabs.html Renamed files

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bower.io

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$ npm install -g bower Terminal

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$ npm install -g bower ! npm http GET https://registry.npmjs.org/bower npm http 200 https://registry.npmjs.org/bower npm http GET https://registry.npmjs.org/bower/-/bower-1.3.3.tgz npm http 200 https://registry.npmjs.org/bower/-/bower-1.3.3.tgz npm http GET https://registry.npmjs.org/bower-endpoint-parser npm http GET https://registry.npmjs.org/bower-json npm http GET https://registry.npmjs.org/bower-config npm http GET https://registry.npmjs.org/bower-logger npm http GET https://registry.npmjs.org/bower-registry-client npm http GET https://registry.npmjs.org/insight … Terminal

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~/development/my-tabs $ bower install Terminal

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~/development/ $ ls ! core-action-icons core-component-page my-tabs platform polymer chai mocha Terminal

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~/development/ $ ls ! core-action-icons core-component-page my-tabs platform polymer chai mocha Terminal Avoids nested dependency trees my-tabs / bower_components my-toolbar / bower_components my-button / bower_components

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! ! ! ! Polymer(‘seed-element’, {…}); my-tabs.html

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! ! ! ! my-tabs.html noscript if not using JS

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RE-USING ELEMENTS

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polymer-project.org/docs/elements/

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http://polymer.github.io/core-docs/ #core-selector

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http://polymer.github.io/core-docs/ #core-selector

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http://polymer.github.io/core-docs/ #core-selector

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! $ bower install Polymer/core-selector —save Terminal

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! $ bower install Polymer/core-selector —save ! bower cached git://github.com/Polymer/core-selector.git#0.3.0 bower validate 0.3.0 against git://github.com/Polymer/core-selector.git#* bower not-cached git://github.com/Polymer/core-selection.git#>=0.3.0 <1.0.0 bower resolve git://github.com/Polymer/core-selection.git#>=0.3.0 <1.0.0 bower not-cached git://github.com/Polymer/polymer.git#>=0.3.0 <1.0.0 bower resolve git://github.com/Polymer/polymer.git#>=0.3.0 <1.0.0 Terminal

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! ! !

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! ! ! ! ! my-tabs.html

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! ! ! ! ! my-tabs.html

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:host { font-family: ‘Roboto’, ‘Arial’, sans-serif; } ! polyfill-next-selector { content: ':host > .core-selected'; } ::content > .core-selected { background: #5599FF; color: white; } ! polyfill-next-selector { content: ':host > *'; } ::content > * { min-width: 60px; height: 60px; line-height: 60px; text-align: center; padding: 0 8px; font-size: 14px; color: #999; } my-tabs.css

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! Tab 1 Tab 2 Tab 3 Ideal usage

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! Tab 1 Tab 2 Tab 3 Ideal usage

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! ! !
! my-tabs.html

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my-tabs Demo ! ! ! demo.html

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... ! One Two Three ! demo.html

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... ! One Two Three ! demo.html selected=“0” selects the first tab

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! $ python -m SimpleHTTPServer 8000 Terminal

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Deployment

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ELEMENTS CAN BE SHARED

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Push to master!

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Push docs, demos, landing page to gh-pages! Next

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~/development/my-tabs $ cd .. Terminal

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$ mkdir temp && cd temp Terminal

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$ git clone git://github.com/Polymer/tools.git ! Cloning into 'tools'... remote: Reusing existing pack: 1201, done. remote: Total 1201 (delta 0), reused 0 (delta 0) Receiving objects: 100% (1201/1201), 834.45 KiB | 277.00 KiB/s, done. Resolving deltas: 100% (476/476), done. Checking connectivity... done. ! ! Terminal

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$ ./tools/bin/gp.sh my-tabs Terminal

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http://bit.ly/NZmXRP

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http://addyosmani.github.io/my-tabs

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Docs Automatically scraped and generated from source.

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https://www.flickr.com/photos/ bensutherland/2274353620

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Tests Unit testing your elements

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! var myEl = document.querySelector('seed-element'); assert.equal(myEl.author, 'Dimitri Glazkov'); Test properties

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! var hello = myEl.sayHello(); assert.equal(hello, 'seed-element says, Hello World!'); ! var greetings = myEl.sayHello('greetings Earthlings'); assert.equal(greetings, 'seed-element says, greetings Earthlings'); Test methods

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! myEl.addEventListener('seed-element-lasers-success', function(event) { ! assert.equal(event.detail.sound, 'Pew pew pew!'); done(); }); ! myEl.fireLasers(); Test events

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Elements ! Docs ! Tests !

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GO COMPONENTIZE THE WEB TODAY

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Thank you! #componentizetheweb +AddyOsmani @addyosmani

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github.com/PolymerLabs/seed-element