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Who am I? ๏ Founder @ Dynamatik ๏ Co-Founder @ Ember Chat ๏ Engineer @ Kobo ๏ @FaisalAbid ๏ [email protected] - Ask me anything about Node, AngularJS, Dart, Polymer, and Android.

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About the talk ๏ Split into three parts. ๏ For someone who has not done Dart and Polymer before. ๏ Goal is to inspire you to go out, learn Dart & Polymer and rule the world. ๏ Part 1. Dart introduction to basic language concepts ๏ Part 2. Quick rundown of Web components & Polymer ๏ Part 3. Dart + Polymer and how they love each other

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But first Let’s play a game

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Guess the language

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! public String Hello(){ return "World"; }

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! public String Hello(){ return "World"; } Java

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! function Hello(){ return "World"; }

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! function Hello(){ return "World"; } Javascript

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! String Hello(){ return "World"; }

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! String Hello(){ return "World"; } Dart!

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You already know Dart* *95% of it at least

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1 Dart

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What is Dart & Why should I care? ๏ Dart is a new platform and language by Google. ๏ Dart is for “Scalable web app engineering”

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“Scalable web app engineering” What does that mean?

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Scalable web app engineering ๏ Javascript is “Scalable” to an extent • RequireJS/AMD modules • Frameworks like Backbone, Ember.js, Angular.js • JQuery, Zepto

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Javascript is the root of all evil* *a little bit dramatic, but gets the point across

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Scalable web app engineering ๏ Dart is built for scale • Optional type checking - I <3 typed objects • Single threaded “Isolate” concept for server apps. Web workers for client. • Objects, Classes, Polymorphism • Easy async, less messy callbacks • Many years of programming language research • High performance VM, Dartium • Compile straight to JS for cross browser compatibility

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All while keeping the language easy to develop in.

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All while keeping the language easy to develop in. Because all that scale stuff is cool, but this is what really matters.

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class Conference { String name; num attendees; Conference(String name, num attendees) { this.name = name; this.attendees = attendees; } } // then later var OSCON = new Conference("OSCON", 5800); Example Class in Dart

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Dart IDE Tour

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Dart IDE Tour

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Dart Package Manager

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Dart IDE Tour

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Dart IDE Tour

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OOP ๏ Dart is Object Oriented. ๏ Makes web development sane. ๏ Concept of libraries to pair multiple classes together. ๏ One .dart file can have multiple classes.

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Dart OOP Example

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OOP - summary ๏ Part / Part of makes easy to separate “libraries” ๏ Constructors can easily set instance variables ๏ Control visibility with _ ๏ Easy one line methods with => ๏ Listen to events with .listen

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Optionally Typed ๏ Dart is optionally typed. ๏ For Public API’s / Public Methods - Use Type ๏ For internal method implementations, use var. • Dart IDE will make use of type info also. Easy code assist. • “Explicit type annotations are usually just visual noise.”

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Dart Typed Example

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Dart > Javascript

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Async / Future ๏ One of the most powerful features of Dart ๏ Dart is single threaded, blocking code blocks! ๏ Dart futures lets you perform async operations. I.e HTTP

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Dart Future Example

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Async / Future - Recap ๏ One of the most powerful features of Dart ๏ Dart is single threaded, blocking code blocks! ๏ Dart futures lets you perform async operations. I.e HTTP ๏ Futures make it easy to avoid callback hell and keep syntax simple. ๏ Almost one line API calls. no callbacks needed

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Dart Everywhere ๏ You can write your Dart apps on the server side also! ๏ Dart on the full stack! Front-end and backend. ๏ Use classes, futures and everything you’ve learned

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Simple Dart:io Example

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Dart for web ๏ Ran through simple but powerful examples. ๏ Dart makes web development easy. ๏ Dart is built to scale, with OOP principals, Async programming made easy and simple to use syntax. Making Dart web apps is easy. ๏ But what’s this polymer thing about?

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2 Polymer / Web components

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What are web components? ๏ Next generation of encapsulation for the web. ๏ Build your own tag, hide the implementation details.

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Whats the shadow DOM? ๏ Shadow DOM hides the web component implementation from the DOM. ๏ I.e shows up as and not a series of divs. ๏ Ready in firefox, chrome, opera, and their mobile counterparts. ๏ Not in Safari. ๏ Polyfills ready for older browsers and Safari. Mileage may vary

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Now what’s Polymer then? ๏ Truthfully the web component spec is sometimes messy ๏ Hard to implement on its own. ๏ Polymer wraps all this up in a nice abstraction layer. By Google ๏ Works wherever Web components/ Shadow dom works.

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Can I use Polymer with only Dart? ๏ No! Polymer can be used with Javascript. In fact it’s first written for JS. ๏ Dart has a feature parity port by Google. ๏ pub : polymer ๏ pub : paper-elements ๏ Polymer is better with Dart. You feel like you are coding for the future.

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3 Dart meet Polymer

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How do you use Polymer with Dart ๏ Starter project makes it easy to get started. ๏ Transformer gets polymer all ready to rock.

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Dart / Polymer Example

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Simple data binding in Polymer ๏ You want your components to do something and take attributes ๏ Databinding is simple with polymer. ๏ Lets take a look!

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Dart / Polymer Databinding

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Simple data binding in Polymer ๏ You want your components to do something and take attributes ๏ Databinding is simple with polymer. ๏ @published - is two way binding ๏ @observable - is one way binding

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Advanced data binding in Polymer ๏ Databind on lists too!

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! @CustomTag(‘speaker-list') class SpeakerList extends PolymerElement { final List speakers = toObservable(["Speaker One", "Speaker Two", "Speaker Three"]); ! SpeakerList() : super.created(); } ! [ . . . ] !
  • {{speaker}}
    • Example list data binding in Dart

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    Advanced data binding in Polymer ๏ Databind on lists too! ๏ DAMN THIS IS EASY!!!!

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    Material Design & Polymer ๏ Google introduced this at Google IO ๏ Sexy fluid new UI components for the web & mobile. ๏ “Paper-elements” is a package ready to be used by Dart. In fact many examples have used paper-elements already!

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    Material Design / Polymer Example

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    Closing Thoughts ๏ Dart is ready for prime time. version 1.5.2 ๏ Polymer still in beta for Dart, but “pretty” stable. ๏ Dart brings sanity to web development. ๏ Polymer/Web components brings proper modularity to web development. ๏ Dart is moving full steam ahead, adopted heavily by Google. ๏ It’s not going anywhere, so embrace change and lets rule the world.

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    Thank you @FaisalAbid - [email protected] Title screen by Sam Beck - two-thirty.tumblr.com Thanks to cloudimage.io for helping me out with my Image CDN needs. Check them out!

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