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React + Firebase Yuichiro MASUI @masuidrive Toreta, Inc. CTO

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Nice to meet u. I’m Ichi • Yuichiro MASUI @masuidrive • Toreta, Inc CTO / co-founder • Ruby, Javascript, Obj-C and many languages • Programming lover

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RubyConf Taiwan 2014

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Questions If you have questions in this session, please tweet with #GCPUG My hearing skill is poor :-p

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Firebase • One of BaaS (Backend as a Service) • Realtime Database • Simple Login • Hosting

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Firebase • Founded in 2011 (YC11) • Acquired by Google in 2014

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Realtime database • NoSQL - JSON friendly database • Libraries: Javascript (Browser/Node), iOS, Android • REST API • A lot of examples and tutorials

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Realtime database • NoSQL - JSON friendly database • Libraries: Javascript (Browser/Node), iOS, Android • REST API • A lot of examples and tutorials { key1: “VAL1”, key2: “VAL2”, key3: { key4: “VAL4” } }

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Realtime database • NoSQL - JSON friendly database • Libraries: Javascript (Browser/Node), iOS, Android • REST API • A lot of examples and tutorials { key1: “VAL1”, key2: “VAL2”, key3: { key4: “VAL4” } } GET “/key1”

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Realtime database • NoSQL - JSON friendly database • Libraries: Javascript (Browser/Node), iOS, Android • REST API • A lot of examples and tutorials { key1: “VAL1”, key2: “VAL2”, key3: { key4: “VAL4” } } GET “/key1” “VAL1”

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Realtime database • NoSQL - JSON friendly database • Libraries: Javascript (Browser/Node), iOS, Android • REST API • A lot of examples and tutorials { key1: “VAL1”, key2: “VAL2”, key3: { key4: “VAL4” } } GET “/key1” “VAL1” GET “/key3/key4”

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Realtime database • NoSQL - JSON friendly database • Libraries: Javascript (Browser/Node), iOS, Android • REST API • A lot of examples and tutorials { key1: “VAL1”, key2: “VAL2”, key3: { key4: “VAL4” } } GET “/key1” “VAL1” GET “/key3/key4” “VAL4”

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Realtime database • NoSQL - JSON friendly database • Libraries: Javascript (Browser/Node), iOS, Android • REST API • A lot of examples and tutorials

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Realtime database Hello!!

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Realtime database Hello!! database

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Database with notifications ClientA ClientB Firebase ClientC

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Database with notifications ClientA ClientB Firebase ClientC Set(A: 1)

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Database with notifications ClientA ClientB Firebase ClientC Set(A: 1) Added(A: 1) Added(A: 1)

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API • Set / Get / Remove • Query • Auth • Events

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First step • Sign up • Log in

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Second Step • Create database • Web Dashboard • CRUD

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Third Step • Manipulate database through from JS • Create app with client side JS only

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Role on database • Javascript based ACL on each data

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Authenticate • Email / password • Social media login • Google+, Facebook, GitHub, Twitter

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Why Firebase? • Almost web app is front end of DB • Browser Javascript API • Security and role

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But • Hard to build realtime web app on Javascript • DOM manipulation is too complex

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DOM is global variables
foo
DOM has state Add Divided operations
 from DOM
foo
Anybody can change DOM

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Client side logic Synchronous web app Browser Logic = Controller HTTP request Server User HTML generator (render) HTML generator (template engine) Generated state (setState) Generated state (template variables)

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Client side logic Browser Server User Event (onSubmit) React.js Server side logic HTML generator (render) Generated state (setState)

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React.js • Javascript library for building UI • Born from Facebook in ~2013 • Expanded to other companies • HipChat, AirBnB, Codecademy…

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Building UI • Just UI library • Components • Facebook provide Flux architecture framework • One direction flow

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var App = React.createClass({ getInitialState: function(){ return({items:[”abc”, ”def”]}); }, render: function() { return
    {this.state.items.map(function(item) { return
  • {item}
    • })}
; } }); React.render(, document.body);

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var App = React.createClass({ getInitialState: function(){ return({items:[”abc”, ”def”]}); }, render: function() { return
    {this.state.items.map(function(item) { return
  • {item}
    • })}
; } }); React.render(, document.body);

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var App = React.createClass({ getInitialState: function(){ return({items:[”abc”, ”def”]}); }, render: function() { return
    {this.state.items.map(function(item) { return
  • {item}
    • })}
; } }); React.render(, document.body);

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var App = React.createClass({ getInitialState: function(){ return({items:[”abc”, ”def”]}); }, render: function() { return
    {this.state.items.map(function(item) { return
  • {item}
    • })}
; } }); React.render(, document.body);

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var App = React.createClass({ mixins: [ReactFireMixin], getInitialState: function(){ return({items:[]}); }, componentWillMount: function() { fb = new Firebase(this.props.url); this.bindAsArray(fb, "data"); this.firebaseRefs[“data"] .on("child_added", this.add.bind(this)); }, add: function(snapshot) { this.setState({ items: this.state.items.concat([snapshot.val()]) }); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
; } }); React.render(, document.body);

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var App = React.createClass({ mixins: [ReactFireMixin], getInitialState: function(){ return({items:[]}); }, componentWillMount: function() { fb = new Firebase(this.props.url); this.bindAsArray(fb, "data"); this.firebaseRefs[“data"] .on("child_added", this.add.bind(this)); }, add: function(snapshot) {

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var App = React.createClass({ mixins: [ReactFireMixin], getInitialState: function(){ return({items:[]}); }, componentWillMount: function() { fb = new Firebase(this.props.url); this.bindAsArray(fb, "data"); this.firebaseRefs[“data"] .on("child_added", this.add.bind(this)); }, add: function(snapshot) {

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var App = React.createClass({ mixins: [ReactFireMixin], getInitialState: function(){ return({items:[]}); }, componentWillMount: function() { fb = new Firebase(this.props.url); this.bindAsArray(fb, "data"); this.firebaseRefs[“data"] .on("child_added", this.add.bind(this)); }, add: function(snapshot) {

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var App = React.createClass({ mixins: [ReactFireMixin], getInitialState: function(){ return({items:[]}); }, componentWillMount: function() { fb = new Firebase(this.props.url); this.bindAsArray(fb, "data"); this.firebaseRefs[“data"] .on("child_added", this.add.bind(this)); }, add: function(snapshot) {

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var App = React.createClass({ mixins: [ReactFireMixin], getInitialState: function(){ return({items:[]}); }, componentWillMount: function() { fb = new Firebase(this.props.url); this.bindAsArray(fb, "data"); this.firebaseRefs[“data"] .on("child_added", this.add.bind(this)); }, add: function(snapshot) {

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.on("child_added", this.add.bind(this)); }, add: function(snapshot) { this.setState({ items: this.state.items.concat([snapshot.val }); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
; } });

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.on("child_added", this.add.bind(this)); }, add: function(snapshot) { this.setState({ items: this.state.items.concat([snapshot.val }); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
; } });

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.on("child_added", this.add.bind(this)); }, add: function(snapshot) { this.setState({ items: this.state.items.concat([snapshot.val }); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
; } });

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.on("child_added", this.add.bind(this)); }, add: function(snapshot) { this.setState({ items: this.state.items.concat([snapshot.val }); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
; } });

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One direction flow • Can’t read DOM. Only write. $(“#count”).val($(“#count”).val() + 1); $(“#item”).toggle(“visible”);

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One direction flow • Can’t read value of handle: function(event) { this.setState({email: event.target.value}); }

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One direction flow • Can’t read value of handle: function(event) { this.setState({email: event.target.value}); }

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One direction flow • Can’t read value of handle: function(event) { this.setState({email: event.target.value}); }

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handleUpdateText: function(e) { this.setState({ newText: e.target.value }); }, handlePost: function(e) { this.firebaseRefs[“data”].push(this.state.newText); this.setState({newText: “”}); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
Post
; }

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    {this.state.items.map(function(item){ return
  • {item}
    • })}
Post< iv>;

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`
    {this.state.items.map(function(item){ return
  • {item}
    • })}
Post< iv>;

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handleUpdateText: function(e) { this.setState({ newText: e.target.value }); }, handlePost: function(e) { this.firebaseRefs[“data”].push(this.state.newText); this.setState({newText: “”}); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
Post
; }

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handleUpdateText: function(e) { this.setState({ newText: e.target.value }); }, handlePost: function(e) { this.firebaseRefs[“data”].push(this.state.newText); this.setState({newText: “”}); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
Post
; }

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handleUpdateText: function(e) { this.setState({ newText: e.target.value }); }, handlePost: function(e) { this.firebaseRefs[“data”].push(this.state.newText); this.setState({newText: “”}); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
Post
; }

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handleUpdateText: function(e) { this.setState({ newText: e.target.value }); }, handlePost: function(e) { this.firebaseRefs[“data”].push(this.state.newText); this.setState({newText: “”}); }, render: function() { return
    {this.state.items.map(function(item){ return
  • {item}
    • })}
Post
; }

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Components directory • React.rock • react-components • Official wiki

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Components directory • React.rock • react-components • Official wiki

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Components directory • React.rock • react-components • Official wiki

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Components directory • React.rock • react-components • Official wiki

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Sample App • Keep collaborate journals app • React + FireBase • https://bit.ly/gcpug0508 • http://github.com/masuidrive/journals • Not for production yet. Keep develop now.

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Wrap up • Firebase is realtime database provider • Can build app with Javascript only • React.js is smart library and architecture for realtime web • React.js and Firebase have good combination