Enemy Of The State - Speaker Deck

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ENEMY of STATE the

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No content

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ammeep

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GitHub

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State

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State & events

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State & events a shit load of

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as complexity increases our sanity decreases

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conflated models

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conflated models views conflated

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conflated models views ﬆate conflated conflated

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conflated models views ﬆate events conflated conflated conflated

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everything is terrible

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design http://www.ﬂickr.com/photos/neononac/ patterns

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ideas

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mv what ever

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Server versus client

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server versus client

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where the magic happens Models

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Views presentation of the magic

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coordination of the magic Controllers

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Routes interaction with the magic

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on the server State

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Stateon the server

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How do we transition state ?

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and events Routes address state

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matches a pattern Router

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matches a pattern Router has action invoked Controller

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matches a pattern Router has action invoked Controller look up and update Model

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matches a pattern Router has action invoked Controller look up and update Model snapshot returned View

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client server boundary addressable & linear

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server versus Client

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STATEFUL CLIENTS no boundaries

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the state space no boundaries

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models the state space no boundaries

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models view ﬆate the state space no boundaries

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models view ﬆate the state space no boundaries application ﬆate

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{❴ {❴ state and transitions inside the boundary

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need decent plans non linear ﬆate space because, complicated

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model view controller stateful presentation patterns

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routes model view controller stateful presentation patterns

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whats all this then? routes model view controller stateful presentation patterns

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addressability we still need

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play out on the client mv what ever you want to call it how does

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! ! /** Models **/ Animal = Backbone.Model.extend({}); PartyAnimals = Backbone.Collection.extend({ model: Animal }); ! /** View /Controller / Worlds most poorly named object **/ PartyAnimalView = Backbone.View.extend({ ! template: "#party-animal-template", render: function(){ var html = $(this.template).tmpl(this.collection); $(this.el).html(html);

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encapsulation breaking

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! ! AppRouter = Backbone.Router.extend({ ! routes: { '#/party': 'startTheParty', '#/party/uninvite/:animal': 'revokePartyRights' }, revokePartyRights: function(animal){ model = partyAnimalCollection.find(animal); model.destroy(); $("#animal-party").remove(); }, ! startTheParty: function(animal){ var view = new PartyView({ collection : partyAnimalCollection }); partyAnimalCollection.fetch(); view.render(); } ! }); !

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SECOND CLASS citizens

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rows in a database our models are more than they are rich and interactive

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Routes are a feature

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enemy are routes the

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the enemy over use of routes is

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shoe horned a web server onto the client

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address state but never transitions

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refactor transitions ‘

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! /** Models **/ Animal = Backbone.Model.extend({}); PartyAnimals = Backbone.Collection.extend({ model: Animal }); ! ! /** View /Controller / Worlds most poorly named object **/ PartyAnimalView = Backbone.View.extend({ ! el: "#animal-party", template: "#party-animal-template",

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no more unnecessary look ups

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and the view is in charge

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addressability is still a key concern

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embraces events an architecture which

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models Syncs state, Transition state. Raises events

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models Syncs state, Transition state. Raises events views Handles model events Handles DOM events

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models Syncs state, Transition state. Raises events views Handles model events Handles DOM events templates HTML rendered by the view

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controller Initialises models and views keeps track of their placement within a given container models Syncs state, Transition state. Raises events views Handles model events Handles DOM events templates HTML rendered by the view

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module A strand alone component

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The secret to building large apps is never build large apps. Break your application into small pieces. Then, assemble those testable, bite-sized pieces into your big application ” “ Justin Meyer, author JavaScriptMVC

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Modules

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never place themselves a modules views on the application shell

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! Layout Composition

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! ! ! ! ! var rm = new Marionette.RegionManager(); ! var region = rm.addRegion("foo", “#bar”); ! var regions = rm.addRegions({ mainContent: "#mainContent", sideBar: “#sideBar" }); ! regions.mainContent.show(myView);

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! ! ! ! ! var composer = new LayoutComposer(); ! var region = composer.addRegion(“mainContent", “#mainContent"); ! var composer = rm.addRegions({ mainContent: "#mainContent", sideBar: “#sideBar" }); ! composer.mainContent.show(suchModule); ! // region.show() function // will supply the module with the el to render to

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layout composer Initialises models and views keeps track of their placement within a given container module A strand alone component

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the dispatcher

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the router

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! ! ! ! ! ! module.exports = Dispatcher = (function() { ! Dispatcher.extend = Backbone.Model.extend; ! _.extend(Dispatcher.prototype, EventBroker); ! Dispatcher.prototype.previousRoute = null; ! Dispatcher.prototype.currentModules = null; ! Dispatcher.prototype.currentRoute = null; ! Dispatcher.prototype.initialize = function(options) {

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layout composer Initialises models and views keeps track of their placement within a given container module A strand alone component dispatcher Loads new modules disposes of old

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layout composer Initialises models and views keeps track of their placement within a given container module A strand alone component dispatcher Loads new modules disposes of old router Mediates address bar events

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composable and event driven a new design

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scaling a state space can be really hard work TL;DR

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especially when we don’t separate concerns TL;DR

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address states never transitions TL;DR

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take inspiration and evolve ideas TL;DR

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dont build servers on the client TL;DR

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Thank you @ammeep amy.palamounta.in internet related activities: github.com/ammeep ENEMY ofSTATE the chaplinjs.org marionettejs.com