Neck

Neck is a library that adds number of features to Backbone.js:

• Event driven data-binding between controller and view (no dirty checking)
• Flexible dependeny injection module working with CommonJS out of the box
• Support for any JavaScript template engine
• Over a dozen helpers for view logic:
  • collections/lists management
  • showing/hiding elements
  • triggering events
  • routing (by refrencing and url based) to nested views (working like Android Activity Stack)
  • and more...

Overview

Library is inspired (in convention and code) by frameworks Angular and Batman. Neck is not separete framework. It extends Backbone.js functionality. You can use it with many other plug-ins and libraries created for Backbone.js.

Simple todo application could looks like this:

Controller:

class MyController extends Neck.Controller
  constructor:->
    super
    @scope.models = new Backbone.Collection()

View:

div(ui-neck="'MyController'")
  ul(ui-collection="models")
    li
      span(ui-value="item.get('name')")
      button(ui-event-click="item.destroy()") remove

  input(ui-bind="newItemName")
  button(
    ui-event-click="models.add({name: newItemName}); newItemName = ''"
    ui-attr="{ disabled: !newItemName }"
  ) Add todo

Setup

bower install --save neck

Library depends on Backbone.js and Underscore.js. They have to be included before Neck.

<script src="/path/to/underscore.js"></script>
<script src="/path/to/backbone.js"></script>
<script src="/path/to/neck.js"></script>

Browser support

• Current version of all modern browsers, IE9+

Project skeleton

To take full potencial of Neck, You should use it with CoffeeScript and one of JavaScript template engines.

I encourge to use Neck on Brunch skeleton, which can be great starting point for working with Neck. It includes tools like Brunch building tool, CommonJS, CoffeeScript, Stylus and Jade. It is working example of simple Neck application.

API Documentation

• Neck.Controller
  • Initializing
  • Instance properties
    • scope
    • parent
    • params
    • template
    • divWrapper
    • parseSelf
    • injector
  • Instance methods
    • constructor
    • render
    • watch
    • apply
• Neck.Helper
  • Initializing
  • Understanding accessors
  • Power of universal interpreting
  • Mapping accessors
  • Helper with template
  • Instance properties
    • attributes
    • orderPriority
• Neck.App
  • Instance properties
    • routes
    • history
• Neck.DI
  • Neck.DI.globals
  • Neck.DI.commonjs
• Built-in helpers
  • ui-attr
  • ui-bind & ui-value
  • ui-class
  • ui-collection
  • ui-element
  • ui-event-...
  • ui-hide & ui-show
  • ui-href
  • ui-init
  • ui-list
  • ui-neck
  • ui-route
  • ui-template
  • ui-yield

Neck.Controller

Extends Backbone.View, controls data passed to template. It can be also container for callback actions from view (Initialized template with controller is called as a view).

Initializing

Neck.Controller can be initialized directly or by ui-neck helper (read ui-neck section):

class MyController extends Neck.Controller
  template: 'myControllerTemplate'
  constructor:->
    super
    # Your setup actions
    @$el.addClass 'myController'

myController = (new MyController el: $('#myElement')).render()

When you initialize controller directly, you have to call render method to start parsing process and connect template to controller el object.

Instance properties

scope controller.scope

Everything that you set inside scope property will be available in a view.

class MyController extends Neck.Controller
  constructor:->
    super
    @scope.property = 'Some text'
    @scope.something = 'Some other text'

h1 My View
p!= property
ul
  li!= something
  li(ui-value="something")

You can use scope properties directly and put them in template (they will refresh on every render call), or put them into helpers using accessors.

scope is passed as first argument to templating function. Many templating engines use passed object as context (like Jade). Then scope properties can be accessed by thier name directly.

Properties can be predefined (you can omit constructor method):

class MyController extends Neck.Controller
  scope:
    property: 'first property text'

  someAction: ->
    console.log @scope.property # Will write 'first property text'

scope has special _context and _resolves properties. They should not be touched or used directly.

parent controller.parent (default: undefined)

Controller can be initialized with parent parameter which should points to other Neck.Controller instance:

myController = new Neck.Controller parent: ohterController

Child controller inherits scope property from parent (as its prototype). Then child controller will have access to parent scope properties by prototype chain (This is used by helpers that inherits scope from main controller).

params controller.params (default: undefined)

Use it to safely pass arguments from one controller to another.

For example:

myController =  new Neck.Controller(params: myParam: 'some text')

Consider using params with higher priority than inheriting scope. Passing params to controller is safer and more useful. For example you can create generic contollers that react to given params.

Params are not pushed to scope property. There is no scope.params in controller. If you want to some param to be in view, You have to set it in scope when initializing controller:

class myController extends Neck.Controller
  constructor:->
    super
    @scope.myProperty = @params.passedObject

template controller.template (default: undefined)

Property used for rendering body of view. Expected values:

• string: id or template body for dependency injector (read Neck.DI section). Injector should return function (as function value below) or string containing template.
• boolean: When set to false controller el body will be used as template but not removed from DOM. When set to true DOM tree is empty before rendering. This is important for example when helper will reuse own body to create list of elements (read ui-collection or ui-list sections).
• function: Set with controller.scope property as first argument. Should return string value containg template body

When is not set (default undefined value) template is not used, but can be overwritten by options pushed to constructor method:

# This will work. template will be set to 'myTemplatePath'
myController = new Neck.Controller template: 'myTemplatePath'

class Controller extends Neck.Controller
  template: 'myWorkingTempalatePath' # can be also false / true / templateBody[string]

# This won't change template, and it still will be 'myWorkingTemplatePath'
myController = new Controller tempalte: 'myTemplatePath'

Some helpers use this functionality to automatically connects controller with corresponding view (RoR way). Initializing controller with set template param will point the same path for view as for controller (but with template type for Neck.DI).

divWrapper controller.divWrapper (default: true)

Controller el object (read Backbone.View docs) for default is created as empty div. Template will be placed inside this div element. divWrapper gives you option to change this behavior. If it is set to false, el object will be replaced by view and appended to DOM without div wrapper.

parseSelf controller.parseSelf (default: true)

It sets parsing view starting point. Parsing can be started from root node (when set to true) or from direct children of root node (when set to false).

injector controller.injector (default: Neck.DI.globals)

Injector property sets which dependency injector object is used when fetching controllers, helpers and templates. This property is inherited by controllers and helpers through whole application. You do not need to set it in every controller/helper, only root controller should have this property set. If You initialize application by helpers, You do not have to set it at all directly in controller.

Instance methods

constructor new Neck.Controller(params)

Constructor method reads pushed params object and use properties: parent, params, template and all that use Backbone.View (like el property).

They are used to set instance properites. Other properties from given object are ignored.

render controller.render()

Method fetches template with scope property, executes template function, parses view for helpers and pushes it to el controller. This method usually do not have to be called directly. For example ui-yield call render after creating new view. However, if you have to refresh view, you can call render method from controller.

This method provides two public events: render:before and render:after. After render event is triggered when view is placed into DOM. This ensures that calling measurement methods will return proper values.

watch controller.watch(keys, callback, initCall)

Triggers callback action when one or more scope properties has changed. Expected arguments:

• keys [string]: space separated list of evaluating properties of controller.scope object
• callback [function]: called every time when one of keys has changed; called with all keys as arguments in function, this set to controller instance where watch is set.
• initCall [boolean]: Default value: true. If set to false your callback will not be triggered when watching is initialized.

For Backbone.Model method listen also to change event. For Backbone.Collection its add, remove and change events.

When watch is set first time, that scope property is changed to getter/setter property. Then every time when value of this property change, callback will be invoked:

@scope.one = 'Something'
@watch 'one', (value)-> console.log "One now is: #{value}"

# This will trigger callback with new value
@scope.one = 'New thing'

Deep properties are not supported. Do not use it with keys set to something like 'one.two.three'. This method do not polyfills Object.observe method. Changing deep properties directly in controller will not trigger callback. For more complex structures use Backbone.Model and 'Backbone.Collection`. (There is great library Backbone-relational.js for models with relations).

Hovewer, helper accessor triggers proper changes on deep properties (thanks to its mapping proccess). It is recommended to rely more on helpers than using watching method directly in controller.

apply controller.apply(key)

Usually called by library, accessors or helpers, but can be called manually to trigger watch callback for scope properties. Should be called with key as string containing contorller.scope property name.

Neck.Helper

Extends Neck.Controller. Used to create view logic and controller data manipulation.

Initializing

View of controller (el object) is parsed when controller is rendered. Going down in tree, nodes are read looking for specific attributes - with ui- prefix. Name after prefix is traslated from dashed to camelCase and checked, if helper definition exists - firstly in built-in helpers container or when there is no helper - pushed to Neck.DI with helper type.

div(ui-some-helper="someValue", some-helper-property="'test'")

On initializing helper, main attribute body is used. Initializer can take also other attributes. To avoid duplicates use part after prefix and some name. For example ui-some-helper should read other attributes like some-helper-property or some-helper-other-thing. This properites are called accessors.

Helper inherits scope from controller. Controller scope properties can be accessed from helper scope.

Understanding accessors

Accesors are automatically pushed to helper scope. Main attribute (defining helper) as scope._main. Other attributes are translated from dashed to camelCase (from some-helper-property to scope.someHelperProperty).

Attributes body is interpreted as JavaScript code in context of parent controller scope. This means that someValue is translating into controller.scope.someValue. Interpreting method is called every time accessor value is read or written. Value of accesor is dynamic and depends of actual state of controller scope.

As body is interpreted as JavaScript, you can write statements as: a + b + 'someText' or someAction(a + b). In this example a and b will be interpreted in controller scope context. Also method someAction will be called as controller.scope.someAction.

Not initialized controller.scope properties will be set to undefined to prevent JavaScript runtime error. Deep properties will be set as chain of simple objects with last attribute set as undefined. For example one.two.three if not present in controller.scope will be created as scope.one = { two: { three: undefined }}. Creating not initialized properties work onlty for objects. If you use array, it has to be defined in controller.

Complex statements are not supported like: if (a) { someAction(b)} . You should understand accessor body as write or read inline statement. However, you can use ; line separator to create more than one call. It is useful for action triggers. Reading accessors will use returned value form first statement. Also inline conditions are supported, like a ? b : c.

Adding special character @ gives possibility to call controller directly (@someValue will be interpreted as controller.someValue). This is useful to call actions from controller inside helper. In below example will be triggered action written directly in controller :

a(ui-event-click="@controllerAction()")

If you want to call some global value, like window.something write it with this. prefix (this.something).

span(ui-value="this.moment().fromNow()")

Power of universal interpreting

Helper accessors are always interpreted as JavaScript. If helper require string you can pass variable or statement. For example ui-route uses main accessor as controller ID, but you can put there scope property that value will be used as controller ID:

@scope.myRoute = 'someController'

div(ui-route="myRoute", ...)

This is general behavior. It will work with any accessor.

Mapping accessors

Accessor attribute body is scanned for controller's scope properties and all are pushed to special scope._resolves container. When any property changes, refresh event of accessor will be triggered.

class Helper exteds Neck.Helper
  constructor:->
    super
    @watch '_main', (value)->
      console.log "new value of helper: #{value}"

div(ui-helper="2 + someProperty + one(thirdProperty) + 'otherValue' + secondProperty")

In this example scope._main depends on someProperty, secondProperty and thirdProperty of controller.scope. Changing deep properties in called function will not trigger accessor change (root properties has own getter/setter and triggers changes). You have to call function with deep property as parameter, for example: someAction(property.deepProperty). You can also manually invoke `@apply('property.deepProperty') inside controller method.

Mapping works with deep properites:

div(ui-helper="someObject.someProperty.otherProperty")

In this case mapping will add three properties to be watched: someObject, someObject.someProperty and someObject.someProperty.otherProperty.

Other helper can change this value: someObject.someProperty.otherProperty = "newValue" and then it will trigger referesh. When other helper or controller will change someObject or helper change someObject.someProperty, it also will trigger refresh on that accessor.

Helper with template

To avoid problems with changing orderPriority and template properties on already initialized helper, they are taken from helper prototype. You have to set them before initializing:

class MyHelper extends Neck.Helper
  # Good way
  template: true
  orderPriority: 1

  constructor:->
    super

    # Bad way - parsing will take `true` value of `template`
    @template = false

Helpers with templates can have own nested helpers. Using @ in accessor body of all helpers in chain points to root controller.

Instance properties

attributes helper.attributes (default: undefined)

Array containing list of attributes that will be created as accessors of helper. As written above they should be created with helper name as prefix (but it is not mandatory).

class SuperThing extends Neck.Helper
  attributes: [ 'superThingOne', 'superThingTwo']

  constructor: ->
    super
    console.log @scope.superThingOne, @scope.superThingTwo

div(ui-super-thing="'great stuff'", super-thing-one="'yes'", super-thing-two="'no' + ' or ' + 'yes'")

Main attribute (as scope._main) is always set, even if attributes property is undefined.

orderPriority helper.orderPriority (default: 0)

Helpers are initialized as they are ordered inside node. Chrome and Firefox browsers preserve order of node attributes. Unfortunately Internet Explorer does not. If you plan to write mobile apps for Android and iOS you can skip this property.

When orderProperty is set to higher value helper will be initialized before other helpers in the same node.

Neck.App

Extends Neck.Controller, adds url routing for navigation. Should be used only once for application, usually as root controller. When App is initialized, it checks routes and starts Backbone.history.

Routes are connected with yields, created by ui-yield helper.

Instance properties

routes app.routes (default: false)

List of application routes. Routes can be created in different ways:

class App extends Neck.App
  routes:
    # Without 'yields' - controller points to 'main' yield

    # Shortes way - set as string
    'someUrl': 'someController'

    # Full way - set as object
    # with passed options
    'someUrl/otherUrl':
      controller: 'someController'
      params:
        one: 1
        two: 2
      refresh: false
      replace: false

    # With multi yields, set `yields` container with yields names

    'someUrl/:id':
      yields:
        main:
          controller: 'someController'
        modal: 'otherController'
        extra: false

This three ways can be mixed. Setting yield to false will clear it when url will be reached. Params will be passed as controller.params. refresh and replace properties are described in ui-yield section.

Routes are passed to Neck.Router instance module which extends Backbone.Router. It has all functionality of its parent as setting url params. Different is with passing params to controller - they are passed as object with named parameters from url and query parameters (it is prepared to supports backbone-query-parameters):

# With set url like: '/users/:id' and going to '/users/1?title=asd' 
# will initialize controller with object

@params = 
  id: '1'
  title: 'asd' # Only if you add backbone-query-parameters plugin

When route is reached app.scope._state is set with actual route name. Sometimes it can be useful to check in what state is application.

history app.history (default: pushestate: true)

Options passed to Backbone.history.start method. Read Backbone.history docs for more information.

Neck.DI

Container for dependency injection modules. Every time when application needs controller, helper or template dependency injection load method is called:

# Loading controller
@injector.load someControllerID, type: 'controller'

load method should take first argument as ID of fetching object, second arguments is options object. For now library calls that method with options set to type: 'controller|helper|template'.

Neck supports out of the box two modules: Neck.DI.globals and Neck.DI.commonjs. For default Neck uses globals. You can write your own manager (or extends existing) to work with your project setup. When you use ui-neck helper put your manager into Neck.DI container.

Neck.DI.globals

ID passed to load method will be interpreted as global variable path, someController will be read as window.someController. It can be object chain like someObject.someController. Using globals is very easy - to define something, put it into global scope:

class window.MyController extends Neck.Controller
  ...

div(ui-neck="'MyController'")

When template is fetched and it is not found as global variable, ID is used as template body. This gives possibility to set controller.template as string containing template body.

Neck.DI.commonjs

This injector works with CommonJS module to load dependencies. You have to define your resources in proper way and have require global method.

Module has three parameters that are added as prefixes to resources paths:

• controllerPrefix: [string], default: controllers
• helperPrefix: [string], default: helpers
• templatePrefix: [string], default: templates

If template ID is not a proper path it is interpreted as template body and return without change.

Built-in helpers

Built-in helpers cover basic logic and data management in view. They work with dynamic data-binding. They react automatically to actual state of controller scope.

ui-attr

div(ui-attr="{ id: someProperty, disabled: inputRead == 'something' }")

Set collection of attributes. Main accessor should be a object with key and value pairs. Key name is used as attribute name. If value return true, key is set with key name (for example: disabled='disabled'). When value is false key is removed from node. In ohter cases key is set with value as string.

ui-bind & ui-value

// Binding with input interaction
input(ui-bind="someProperty")
// Backbone.Model property binding with input
input(ui-bind="someModel", bind-property="'name'")
// Binding any node with set 'contenteditable'
div(ui-bind="someProperty", contenteditable="true")

// Binding for only pushig value to node
span(ui-bind="someProperty")

Two way binding scope property or attribute of Backbone.Model. Model has be bind with set bind-property accessor as name of attribute (second example).

Number is translated to integer or float (works with dot and comma delimiter). Other values are returned as string.

Pushing values into input nodes uses val() method. Updating other elements (like div, span) uses html() method. Then writing '<span>something</span>' will show only 'something' text wrapped in span element.

span(ui-value="someProperty")

ui-value is simpler version of ui-bind. It only listen to changes of accessor and pushes value into node. Also it uses text() method, writing '<span>something<span>' will be displayed as it is. Use it if you only want to display value with no interact with user.

ui-class

div(ui-class="{ selected: index == 1, moving: someAction(property)}")

Set collection of classes. Main accessor should be a object with key and value pairs. Key name is used as class name added or removed from node depending on logic value of value.

ui-collection

div(ui-collection="collection" ... )

Render Backbone.Collection models. Main accessor should points to Backbone.Collection. Helper uses accessors:

• collection-item: string: Name of collection model in scope property of item. Default item.
• collection-sort: string or function: Variable pushed as collection.comparator. Read Backbone.Collection docs for more info.
• collection-filter: string or function: When this attribute is string, it is check if model.toString() contain this string. When its false, ui-hide class is added to item. When attribute is function, it should return true or false for given item as argument.
• collection-view: string id: Used with dependeny injection to load item view.
• collection-empty: string id: When collection is empty node can be fill in empty template.
• collection-controller: string id: You can use your own item controller instead Neck.Helper.collectionItem. This can broke helper functionality. Use it if you really need it.

Every item has _index property pushed to its scope which coresponds to collection list index. This property is set once at the begining and is not change when collection is sorted or filtered.

Item templating

When collection-view is not set, body of node is used as item template:

ul(ui-collection="users")
  li(ui-value="item.get('name')")

There is different between using inline template (as node body) and using collection-view. Inline template can not have own template engine logic (it is invoke once when parent template is rendered). Also you can not use item scope properties directly:

ul(ui-collection="users")
  // This will be called when hole ul... is rendered, not when using it for item
  if item.something 
    li(ui-value="item.get('name')")
    li!= item.get('address') // This will not work also

For that behavior use collection-view. It is separate view with own logic and access to scope as normal controller:

ul(ui-collection="users", collection-view="'myUserViewPath'")

if item.something
  li!= item.get('name')

Using inline template, everything is refreshed by helpers (data-binding). Using collection-view gives possibility to set values directly. Because of that, item view has to be rerender every time model changes. It is better to use with external template scope properties directly than by helpers (especially avoid ui-value and use = property).

It gives big performance boost. Rendering large collection with nested collections with inline templating (using lot of helpers) can slow down painting dramatically. Using collection-view you can set item body with scope properties written directly or with data-binding (using helepers).

ui-element

div(ui-element="'myDiv'")

class Controller extends Neck.Controller
  ...
  someCallback: ->
    @scope.myDiv.addClass 'super'

Create jQuery object of node and put it into controller.scope. Main accessor should be string name.

ui-event-...

// Calling controller callback
div(ui-event-submit="@sendForm(true, false)")

// Simple setting new value of scope.property 
div(ui-event-click="property = 'newValue'")

// Statements can use javascript breaking line to create 
// more complex actions
div(ui-event-blur="setSomething(inputValue); inputValue = 'something'")

Trigger proper event by calling action written in main accesor. Type of event is set in name of helper, for example to trigger click event use ui-event-click helper. List of implemented events:

• Mouse events: click, dblclick, mouseenter, mouseleave, mouseout, mouseover, mousedown, mouseup, drag, dragstart, dragenter, dragleave, dragover, dragend, drop.
• General events: load, focus, focusin, focusout, select, blur, submit, scroll.
• Touch events: touchstart, touchend, touchmove, touchenter, touchleave, touchcancel.
• Keys events: keyup, keydown, keypress.

Helper invoke preventDefault() method of DOM event object. It ensure that for example form will not be submit or link will not change url.

Understading data-binding

When event is triggered, apply method is invoke for releated to main accessor scope properties. This close the flow of data-binding proccess. Using event helpers to interact with user actions ensure that your application view will react to data changes automatically (with deep properties mapping).

Using jQuery event object

You can pass reference to function istead of calling it: ui-event-click="myFunction". When helper recognize that main accessor is a function, it will invoke that function passing jQuery event as first argument. Unfortunelly You can not then pass any other arguments defining event.

Also when you pass function normally, but it returns function, that function will be treat as explained above (as function that will be called with jQuery event object).

Multiply events

Neck does not support using the same halper in one node more than once, as DOM attributes have to be unique. You can use complex actions or wrap node into other node (events are bubbling):

div(ui-event-click="...")
  span(ui-event-click="...")

ui-hide & ui-show

div(ui-show="something == 'great'")
div(ui-hide="something != 'great'")

Hides or shows element depends on main accessor logic value. Both helper works similar (with oposite logic) with one difference - ui-hide hides node before it checks logic value for first time. This ensure that element is hidden before it can be seen.

ui-show and ui-hide (also ui-collection and ui-list to filter elements) uses global ui-hide CSS class, that set display: none !important. You can overwrite it if you want to this working differently.

ui-href

a(ui-href="'someUrl'")

Call Neck.Router.navigate method when node is clicked. This changes url using routes from application and fill in yields.

Helper adds href='#' attribute to anchor nodes if it is not set (for styling purposes).

ui-init

div(ui-init="someAction(); someProperty = 123")

Action invoked in parsing proccess. This can be usefull to initially set some values in scope directly from view.

ui-list

div(ui-list="someList", ...)

Helper works similar to ui-collection, but without events which collection has (adding or removing elements, etc..). Main accessor should points to Array instance. Helper uses accessors:

• list-item: string: Name of list element in scope property of item. Default item.
• list-sort: function: Function called within _.sortBy method with element as argument. You can there returned some value that will be used to sort elements.
• list-filter: string or function: When this attribute is string, it is check if item.toString() contain this string. When its false, ui-hide class is added to item. When attribute is function, it should return true or false for given item as argument.
• list-view: string id: Used with dependeny injection to load item view,
• list-empty: string id: When list is empty node can be fill in empty template.
• list-controller: string id: You can use your own item controller instead Neck.Helper.collectionItem. This can broke helper functionality. Use it if you really need it.

Every item has _index property pushed to its scope which coresponds to list index. This property is set once at the begining and is not change when list is sorted or filtered.

Helper only rerender list when main accessor changes. If you change array element or remove it from array, helper will not rerender:

@scope.someList = ['something']

# Won't change view
@scope.someList[0] = 'newValue'

# Will change view 
@scope.someList = ['one', 'two', 'three']

Use this helper for simple list of data. For better data-binding use ui-collection.

Item templating

Read ui-collection corresponding section.

ui-neck

div(ui-neck="'controllerName'", neck-injector="'commonjs'")

This helper is not real Neck.Helper instance. It is ordinary jQuery method invoke when document is ready. For coherence in library, helpers name convention is used here. Main accessor should point to your root controller.

Set neck-injector as name of one of dependency injector in Neck.DI container that you want to use. It will be inherit through all controllers and helpers.

ui-neck uses RoR convention to use controller name as path to template. It constructs controller passing template param as controller ID. When controller has not defined template property, library will look for template using controller ID (but with template type). This works well with commonjs dependency injector. With globals it will point to the same object and can throw errors.

To avoid reusing helper when controller is render, ui-neck attribute is removed from node after initialize.

ui-route

a(ui-route="'someController'", route-yield="'main'", route-params="{ item: someItem }" ... )

Helper pushes controller to ui-yield on click. Main accessor should be string controller ID. Helper uses accessors:

• route-yield: string id : To yield with that id controller will be pushed. When not set, 'main' id will be used.
• route-params: object: Object passed as params property to controller.
• route-refresh: boolean: Refresh option passed to yield. Read more in ui-yield section.
• route-replace: boolean: Replace option passed to yield. Read more in yi-yield section.

Helper does not work without corresponding ui-yield (set with route-yield). Routing does not change url either. For url routing use ui-href and Neck.App with set routes.

ui-template

div(ui-template="someTemplate")
  p Empty list

div(ui-collection="collection", collection-empty="someTemplate")

Set node html body as scope property. Main accessor will be set.

Helper is useful for example for using as empty template for ui-collection or ui-list. Then you do not have to create separate file with empty message, just use property created with ui-template.

Node is removed from DOM after helper is initialized.

ui-yield

div(ui-yield="'main'" ... )

Container for nested views (in this context view means controller with connected template). Main accessor should be string unique ID of yield. This ID can be used by ui-route and routes in Neck.App to determinate where view should be pushed. Helper uses accessors:

• yield-view: string id: Controller ID of initially pushed view to yield
• yield-params: object: Params passed to controller set by yield-view (only for initially view)
• yield-replace: boolean: Determine if view stack is cleared when new view is pushed
• yield-inherit: boolean: Determine scope inheriting

Yield ID

You can use main accessor without setting ID - ui-yield="". Then 'main' ID will be used. Identity has to be unique through all application views, because yield is searched from view where is trigger (like ui-route) up to application root view. This gives possibility to change parts of your application flexible from any point.

ID has to be unique in particular state of application. When view is dismiss you can again use yield with the same ID.

Yield view stack

Yield for default do not remove existings views, it appends new one at the end of node. To view only last one (on the top) you have to write css like this:

[ui-yield] div 
  display none
  &:last-child
    display block

Helper works similar to Android Activity Stack. State of your parent view is holded by browser, and when you close children view, your parent will be in state that was before. But all views work in background. They still has connected data-binding (big stack can slow down application).

If your application is simple, you can use one ui-yield and push there your views. Create stack like this: list -> show -> edit of some products. When you need some navigation, it can be other ui-yield put in root application view or other place. Also modal with wizard pages can be separate ui-yield that has own views with other yields.

Templating in RoR way

Similar to ui-neck, helper uses controller ID as template parameter in controller constructor. If you use Neck.DI.commonjs you can leave template property undefined and Neck will search for template in right place for you.

Replace and refresh views

When yield appends view, it searches if that view is already there. It uses controller ID pushed to ui-route or set in Neck.App routes. If this view is in stack, helper cleares all children of it making this view last one in stack.

Use route-replace, replace routes property or yield-replace to clear stack when new view is appended. Property set in yi-yield have less importance (other properties overrides it). When you call a view that is in stack as root already, it will not refresh it, only clear its children if they exists.

Use route-refresh or refresh routes property to recreate view even it is in yield. Refresh means that view is removed form yield and put again (controller is initialized).

In some cases would be better to invoke some callback when view has to be refreshed (for example when user tirgger back action in browser). If there is set render:refresh event in controller, it will be used instead rebuilding controller.

Scope inheriting

Sharing scope works separate for all views pushed to yield. scope between views in stack is not shared. Each one inherits scope from parent controller, when yield-inherit is set to true.

As it is described in scope section inheriting should be used carefully. Use yield inheritance when it is really needed.

Contribution

Feel free to contribute project. For developing, clone project and run:

npm install && bower install

Use npm start and go to your browser http://localhost:3333/test/ for checking tests.

Pull requests

Write some changes, update tests and do pull request to this repository. Please provide proper prefix to your commits: BUG-FIX, TEST, DOCS, REFACTOR and NEW-FUNC. It will be easier to create changelog reading meaningful commits.

License

Neck is released under the MIT License